visit New www.GLOBE.govHydrologic Unit Codes
Find out more about US watersheds on the EPA "Surf Your Watershed" site. Locate your watershed's Hydrologic Unit Code (HUC) and click on the watershed name. HUC s are listed by region, which is found by taking the first two digits of the HUC .
To find your school's watershed:
- Follow the School Search link in the navigation bar at the side of this page.
- Search for your school by entering your school and/or city name.
- Follow the Map link that appears beneath your school.
- Click on the 'Compare Images' link in the 'Other Options' section.
- Select Geophysical Data from the Data Source menu beneath the map on the right. The default dataset for the geophysical data source is the watershed data. the watershed data.
- Select 'show value/choose school' from the options directly below the maps. Click on your school location, which should be near the center of the map on the left. After you click on your school, the web page will refresh and a table will appear near the bottom of the page. Find your school in the table. If you do not find your school, you may need to click in a different location on the map, or increase the search radius by following the link above the table. Record the HUC value at your school.
- Select the 'Visualization Help Index' link from the 'Other Options' section of that page, then select the 'Hydrologic Unit Codes' link to return to this page.
- Find the corresponding HUC value on this page, and click on the watershed name. NOTE: By following this link, you will be leaving the GLOBE web site.
Hydrologic Regions
1 - New England Region2 - Mid Atlantic Region
3 - South Atlantic-Gulf Region
4 - Great Lakes Region
5 - Ohio Region
6 - Tennessee Region
7 - Upper Mississippi Region
8 - Lower Mississippi Region
9 - Souris-Red-Rainy Region
10 - Missouri Region
11 - Arkansas-White-Red Region
12 - Texas-Gulf Region
13 - Rio Grande Region
14 - Upper Colorado Region
15 - Lower Colorado Region
16 - Great Basin Region
17 - Pacific Northwest Region
18 - California Region
19 - Alaska Region
20 - Hawaii Region
21 - Caribbean Region
1 New England Region 1010001 Upper St. John. Maine 1010002 Allagash. Maine. 1010003 Fish. Maine. 1010004 Aroostook. Maine. 1010005 Meduxnekeag. Maine. 1020001 West Branch Penobscot. Maine. 1020002 East Branch Penobscot. Maine. 1020003 Mattawamkeag. Maine. 1020004 Piscataquis. Maine. 1020005 Lower Penobscot. Maine. 1030001 Upper Kennebec. Maine 1030002 Dead. Maine 1030003 Lower Kennebec. Maine. 1040001 Upper Androscoggin. Maine, New Hampshire. 1040002 Lower Androscoggin. Maine, New Hampshire. 1050001 St. Croix. Maine. 1050002 Maine Coastal. Maine. 1050003 St. George-Sheepscot. Maine. 1060001 Presumpscot. Maine. 1060002 Saco. Maine, New Hampshire. 1060003 Piscataqua-Salmon Falls. Maine, New Hampshire, Massachusetts 1070001 Pemigewasset. New Hampshire. 1070002 Merrimack. Massachusetts, New Hampshire. 1070003 Contoocook. New Hampshire. 1070004 Nashua. Massachusetts, New Hampshire. 1070005 Concord. Massachusetts. 1080101 Upper Connecticut. Maine, Vermont. 1080102 Passumpsic. Vermont. 1080103 Waits. Vermont. 1080104 Upper Connecticut-Mascoma. New Hampshire, Vermont. 1080105 White. Vermont. 1080106 Black-Ottauquechee. Vermont. 1080107 West. Vermont 1080201 Middle Connecticut. Massachusetts, New Hampshire, Vermont. 1080202 Miller. Massachusetts, New Hampshire. 1080203 Deerfield. Massachusetts, Vermont. 1080204 Chicopee. Massachusetts. 1080205 Lower Connecticut. Connecticut, Massachusetts. 1080206 Westfield. Connecticut, Massachusetts. 1080207 Farmington. Connecticut, Massachusetts. 1090001 Charles. Massachusetts. 1090002 Cape Cod. Massachusetts, Rhode Island. 1090003 Blackstone. Massachusetts, Rhode Island. 1090004 Narragansett. Massachusetts, Rhode Island. 1090005 Pawcatuck-Wood. Connecticut, Rhode Island. 1100001 Quinebaug. Connecticut, Massachusetts, Rhode Island. 1100002 Shetucket. Connecticut, Massachusetts. 1100003 Thames. Connecticut. 1100004 Quinnipiac. Connecticut. 1100005 Housatonic. Connecticut, Massachusetts, New York. 1100006 Saugatuck. Connecticut, New York. 1100007 Long Island Sound. Connecticut. 1110000 St. Francois. Vermont.
2 Mid Atlantic Region 2010001 Lake George. New York, Vermont. 2010002 Otter. Vermont. 2010003 Winooski. Vermont. 2010004 Ausable. New York. 2010005 Lamoille. Vermont. 2010006 Great Chazy-Saranac. New York. 2010007 Missiquoi. Vermont. 2020001 Upper Hudson. New York. 2020002 Sacandaga. New York. 2020003 Hudson-Hoosic. New York, Massachusetts, Vermont. 2020004 Mohawk. New York. 2020005 Schoharie. New York. 2020006 Middle Hudson. Massachusetts, New York. 2020007 Rondout. New Jersey, New York. 2020008 Hudson-Wappinger. New York. 2030101 Lower Hudson. Connecticut, New Jersey, New York. 2030102 Bronx. New York. 2030103 Hackensack-Passaic. New Jersey, New York. 2030104 Sandy Hook-Staten Island. New Jersey, New York. 2030105 Raritan. New Jersey. 2030201 Northern Long Island. New York. 2030202 Southern Long Island. New York. 2040101 Upper Delaware. New York, Pennsylvania. 2040102 East Branch Delaware. New York. 2040103 Lackawaxen. Pennsylvania. 2040104 Middle Delaware-Mongaup-Brodhead. NJ, NY, PA. 2040105 Middle Delaware-Musconetcong. New Jersey, Pennsylvania. 2040106 Lehigh. Pennsylvania. 2040201 Crosswicks-Neshaminy. New Jersey, Pennsylvania. 2040202 Lower Delaware. New Jersey, Pennsylvania. 2040203 Schuylkill. Pennsylvania. 2040204 Delaware Bay. New Jersey. 2040205 Brandywine-Christina. Delaware, Maryland, Pennsylvania. 2040206 Cohansey-Maurice. New Jersey. 2040207 Broadkill-Smyrna. Delaware. 2040301 Mullica-Toms. New Hersey. 2040302 Great Egg Harbor. New Jersey. 2050101 Upper Susquehanna. New York, Pennsylvania. 2050102 Chenango. New York. 2050103 Owego-Wappasening. New York, Pennsylvania. 2050104 Tioga. New York, Pennsylvania. 2050105 Chemung. New York, Pennsylvania. 2050106 Upper Susquehanna-Tunkhannock. Pennsylvania. 2050107 Upper Susquehanna-Lackawanna. Pennsylvania. 2050201 Upper West Branch Susquehanna. Pennsylvania. 2050202 Sinnemahoning. Pennsylvania. 2050203 Middle West Branch Susquehanna. Pennsylvania. 2050204 Bald Eagle. Pennsylvania. 2050205 Pine. Pennsylvania. 2050206 Lower West Branch Susquehanna. Pennsylvania. 2050301 Lower Susquehanna-Penns. Pennsylvania. 2050302 Upper Juniata. Pennsylvania. 2050303 Raystown. Pennsylvania. 2050304 Lower Juniata. Pennsylvania. 2050305 Lower Susquehanna-Swatara. Pennsylvania. 2050306 Lower Susquehanna. Maryland, Pennsylvania. 2060001 Upper Chesapeake Bay. Maryland. 2060002 Chester-Sassafras. Delaware, Maryland, Pennsylvania. 2060003 Gunpowder-Patapsco. Maryland, Pennsylvania. 2060004 Severn. Maryland. 2060005 Choptank. Delaware, Maryland. 2060006 Patuxent. Maryland. 2060007 Blackwater-Wicomico. Delaware, Maryland. 2060008 Nanticoke. Delaware, Maryland. 2060009 Pocomoke. Delaware, Maryland, Virginia. 2060010 Chincoteague. Delaware, Maryland, Virginia. 2070001 South Branch Potomac. West Virginia, Virginia. 2070002 North Branch Potomac. Maryland, West Virginia, Pennsylvania. 2070003 Cacapon-Town. Maryland, Pennsylvania, West Virginia. 2070004 Conococheague-Opequon. MD, PA, VA, WV. 2070005 South Fork Shenandoah. Virginia. 2070006 North Fork Shenandoah. Virginia, West Virginia. 2070007 Shenandoah. Virginia, West Virginia. 2070008 Middle Potomac-Catoctin. DC, Virginia, Maryland. 2070009 Monocacy. Maryland, Pennsylvania. 2070010 Middle Potomac-Anacostia-Occoquan. DC, MD, VA. 2070011 Lower Potomac. Maryland, Virginia. 2080101 Lower Chesapeake Bay. Virginia. 2080102 Great Wicomico-Plankatank. Virginia. 2080103 Rapidan-Upper Rappahannock. Virginia. 2080104 Lower Rappahannock. Virginia. 2080105 Mattaponi. Virginia. 2080106 Pamunkey. Virginia. 2080107 York. Virginia. 2080108 Lynnhaven-Poquoson. Virginia. 2080109 Western Lower Delmarva. Virginia. 2080110 Eastern Lower Delmarva. Virginia. 2080201 Upper James. Virginia, West Virginia. 2080202 Maury. Virginia. 2080203 Middle James-Buffalo. Virginia. 2080204 Rivanna. Virginia. 2080205 Middle James-Willis. Virginia. 2080206 Lower James. Virginia. 2080207 Appomattox. Virginia. 2080208 Hampton Roads. Virginia.
3 South Atlantic-Gulf Region 3010101 Upper Roanoke. Virginia. 3010102 Middle Roanoke. North Carolina, Virginia. 3010103 Upper Dan. North Carolina, Virginia. 3010104 Lower Dan. North Carolina, Virginia. 3010105 Banister. Virginia. 3010106 Roanoke Rapids. North Carolina, Virginia. 3010107 Lower Roanoke. North Carolina. 3010201 Nottoway. North Carolina, Virginia. 3010202 Blackwater. North Carolina, Virginia. 3010203 Chowan. North Carolina, Virginia. 3010204 Meheriin. North Carolina, Virginia. 3010205 Albemarle. North Carolina, Virginia. 3020101 Upper Tar. North Carolina. 3020102 Fishing. North Carolina. 3020103 Lower Tar. North Carolina. 3020104 Pamlico. North Carolina. 3020105 Pamlico Sound. North Carolina. 3020106 Bogue-Core Sounds. North Carolina. 3020201 Upper Neuse. North Carolina. 3020202 Middle Neuse. North Carolina. 3020203 Contentnea. North Carolina. 3020204 Lower Neuse. North Carolina. 3030001 New. North Carolina. 3030002 Haw. North Carolina. 3030003 Deep. North Carolina. 3030004 Upper Cape Fear. North Carolina. 3030005 Lower Cape Fear. North Carolina. 3030006 Black. North Carolina. 3030007 Northeast Cape Fear. North Carolina. 3040101 Upper Yadkin. Virginia, North Carolina. 3040102 South Yadkin. North Carolina. 3040103 Lower Yadkin. North Carolina. 3040104 Upper Pee Dee. North Carolina, South Carolina. 3040105 Rocky. North Carolina, South Carolina. 3040201 Lower Pee Dee. North Carolina. South Carolina. 3040202 Lynches. North Carolina, South Carolina. 3040203 Lumber. North Carolina, South Carolina. 3040204 Little Pee Dee. North Carolina, South Carolina. 3040205 Black. South Carolina. 3040206 Waccamaw. North Carolina, South Carolina. 3040207 Carolina Coastal-Sampit. North Carolina, South Carolina. 3050101 Upper Catawba. North Carolina, South Carolina. 3050102 South Fork Catawba. North Carolina. 3050103 Lower Catawba. North Carolina, South Carolina. 3050104 Wateree. South Carolina. 3050105 Upper Broad. North Carolina, South Carolina. 3050106 Lower Broad. South Carolina. 3050107 Tyger. South Carolina. 3050108 Enoree. South Carolina. 3050109 Saluda. South Carolina. 3050110 Congaree. South Carolina. 3050111 Lake Marion. South Carolina. 3050112 Santee. South Carolina. 3050201 Copper. South Carolina. 3050202 South Carolina Coastal. South Carolina. 3050203 North Fork Edisto. South Carolina. 3050204 South Fork Edisto. South Carolina. 3050205 Edisto. South Carolina. 3050206 Four Hole Swamp. South Carolina. 3050207 Salkehatchie. South Carolina. 3050208 Broad-St. Helena. South Carolina. 3060101 Seneca. North Carolina, South Carolina. 3060102 Tugaloo. Georgia, North Carolina, South Carolina. 3060103 Upper Savannah. Georgia, South Carolina. 3060104 Broad. Georgia. 3060105 Little. Georgia. 3060106 Middle Savannah. Georgia, South Carolina. 3060107 Stevens. South Carolina. 3060108 Brier. Georgia. 3060109 Lower Savannah. Georgia, South Carolina. 3060201 Upper Ogeechee. Georgia. 3060202 Lower Ogechee. Georgia. 3060203 Canoochee. Georgia. 3060204 Ogechee Coastal. Georgia. 3070101 Upper Oconee. Georgia. 3070102 Lower Oconee. Georgia. 3070103 Upper Ocmulgee. Georgia. 3070104 Lower Ocmulgee. Georgia. 3070105 Little Ocmulgee. Georgia. 3070106 Altamha. Georgia. 3070107 Ohoopee. Georgia. 3070201 Satilla. Georgia. 3070202 Little Satilla. Georgia. 3070203 Cumberland-St. Simons. Georgia. 3070204 St Marys. Florida, Georgia. 3070205 Nassau. Florida. 3080101 Upper St. Johns. Florida. 3080102 Oklawaha. Florida. 3080103 Lower St. Johns. Florida. 3080201 Daytona-St. Augustine. Florida 3080202 Cape Canaveral. Florida 3080203 Vero Beach. Florida 3090101 Kissimmee. Florida. 3090102 Northern Okeechobee Inflow. Florida. 3090103 Western Okeechobee Inflow. Florida. 3090201 Lake Okeechobee. Florida. 3090202 Everglades. Florida. 3090203 Florida Bay-Florida Keys. Florida 3090204 Big Cypress Swamp. Florida. 3090205 Caloosahatchee. Florida. 3100101 Peace. Florida. 3100102 Myakka. Florida. 3100103 Charlotte Harbor. Florida. 3100201 Sarasota Bay. Florida. 3100202 Manatee. Florida. 3100203 Little Manatee. Florida. 3100204 Alafia. Florida. 3100205 Hillsborough. Florida. 3100206 Tampa Bay. Florida. 3100207 Crystal-Pithlachascotee. Florida. 3100208 Withlacoochee. Florida. 3110101 Waccasassa. Florida. 3110102 Econfina-Steinhatchee. Florida. 3110103 Aucilla. Florida, Georgia. 3110201 Upper Suwannee. Florida, Georgia. 3110202 Alapaha. Florida, Georgia. 3110203 Withlacoochee. Florida, Georgia. 3110204 Little. Georgia. 3110205 Lower Suwannee. Florida. 3110206 Santa Fe. Florida. 3120001 Apalachee Bay-St. Marks. Florida, Georgia. 3120002 Upper Ochlockonee. Georgia. 3120003 Lower Ochlockonee. Florida, Georgia. 3130001 Upper Chattahoochee. Georgia. 3130002 Middle Chattahoochee-Lake Harding. Alabama, Georgia. 3130003 Middle Chattahoochee-Walter F. George Reservoir. AL, GA. 3130004 Lower Chattahoochee. Alabama, Florida, Georgia. 3130005 Upper Flint. Georgia. 3130006 Middle Flint. Georgia. 3130007 Kinchafoonee-Muckalee. Georgia. 3130008 Lower Flint. Georgia. 3130009 Ichawaynochaway. Georgia. 3130010 Spring. Georgia. 3130011 Apalachicola. Florida. 3130012 Chipola. Alabama, Florida. 3130013 New. Florida. 3130014 Apalachicola Bay. Florida. 3140101 St. Andrew-St. Joseph Bays. Florida. 3140102 Choctawhatchee Bay. Florida. 3140103 Yellow. Alabama, Florida. 3140104 Blackwater. Alabama, Florida. 3140105 Pensacola Bay. Florida. 3140106 Perdido. Alabama, Florida. 3140107 Perdido Bay. Alabama, Florida. 3140201 Upper Choctawhatchee. Alabama. 3140202 Pea. Alabama, Florida. 3140203 Lower Choctawatchee. Alabama, Florida. 3140301 Upper Conecuh. Alabama. 3140302 Patsaliga. Alabama. 3140303 Sepulga. Alabama. 3140304 Lower Conecuh. Alabama, Florida. 3140305 Escambia. Alabama, Florida. 3150101 Conasauga. Georgia, Tennessee. 3150102 Coosawattee. Georgia. 3150103 Oostanaula. Georgia. 3150104 Etowah. Georgia. 3150105 Upper Coosa. Alabama, Georgia. 3150106 Middle Coosa. Alabama. 3150107 Lower Coosa. Alabama. 3150108 Upper Tallapoosa. Alabama, Georgia. 3150109 Middle Tallapoosa. Alabama. 3150110 Lower Tallapoosa. Alabama. 3150201 Upper Alabama. Alabama. 3150202 Cahaba. Alabama. 3150203 Middle Alabama. Alabama. 3150204 Lower Alabama. Alabama. 3160101 Upper Tombigbee. Alabama, Mississippi. 3160102 Town. Mississippi. 3160103 Buttahatchee. Alabama, Mississippi. 3160104 Tibbee. Mississippi. 3160105 Luxapallila. Alabama, Mississippi. 3160106 Middle Tombigbee-Lubbub. Alabama, Mississippi. 3160107 Sipsey. Alabama. 3160108 Noxubee. Alabama, Mississippi. 3160109 Mulberry. Alabama. 3160110 Sipsey Fork. Alabama. 3160111 Locust. Alabama. 3160112 Upper Black Warrior. Alabama. 3160113 Lower Black Warrior. Alabama. 3160201 Middle Tombigbee-Chickasaw. Alabama, Mississippi. 3160202 Sucarnoochee. Alabama, Mississippi. 3160203 Lower Tombigbee. Alabama. 3160204 Mobile-Tensaw. Alabama. 3160205 Mobile Bay. Alabama. 3170001 Chunky-Okatibbee. Mississippi. 3170002 Upper Chickasawhay. Alabama, Mississippi. 3170003 Lower Chickasawhay. Alabama, Mississippi. 3170004 Upper Leaf. Mississippi. 3170005 Lower Leaf. Mississippi. 3170006 Pascagoula. Mississippi. 3170007 Black. Mississippi. 3170008 Escatawpa. Alabama, Mississippi. 3170009 Mississippi Coastal. Alabama, Mississippi. 3180001 Upper Pearl. Mississippi. 3180002 Middle Pearl-Strong. Mississippi. 3180003 Middle Pearl-Silver. Mississippi. 3180004 Lower Pearl. Louisiana, Mississippi. 3180005 Bogue Chitto. Louisiana, Mississippi.
4 Great Lakes Region 4010101 Baptism-Brule. Minnesota. 4010102 Beaver-Lester. Minnesota. 4010201 St. Louis. Minnesota, Wisconsin. 4010202 Cloquet. Minnesota. 4010301 Beartrap-Nemadji. Minnesota, Wisconsin. 4010302 Bad-Montreal. Michigan, Wisconsin. 4020101 Black-Presque Isle. Michigan, Wisconsin. 4020102 Ontonagan. Michigan, Wisconsin. 4020103 Keweenaw Peninsula. Michigan. 4020104 Sturgeon. Michigan. 4020105 Dead-Kelsey. Michigan. 4020201 Betsy-Chocolay. Michigan. 4020202 Tahquamenon. Michigan. 4020203 Waiska. Michigan. 4020300 Lake Superior. Michigan, Minnesota, Wisconsin. 4030101 Manitowoc-Sheboygan. Wisconsin. 4030102 Door-Kewaunee. Wisconsin. 4030103 Duck-Pensaukee. Wisconsin. 4030104 Oconto. Wisconsin. 4030105 Peshitgo. Wisconsin. 4030106 Brule. Michigan, Wisconsin. 4030107 Michigamme. Michigan. 4030108 Menominee. Michigan, Wisconsin. 4030109 Cedar-Ford. Michigan. 4030110 Escanaba. Michigan. 4030111 Tacoosh-Whitefish. Michigan. 4030112 Fishdam-Sturgeon. Michigan. 4030201 Upper Fox. Wisconsin. 4030202 Wolf. Wisconsin. 4030203 Lake Winnebago. Wisconsin. 4030204 Lower Fox. Wisconsin. 4040001 Little Calumet-Galien. Illinois, Indiana, Michigan. 4040002 Pike-Root. Illinois, Wisconsin. 4040003 Milwaukee. Wisconsin. 4050001 St. Joseph. Indiana, Michigan. 4050002 Black-Macatawa. Michigan. 4050003 Kalamazoo. Michigan. 4050004 Upper Grand. Michigan. 4050005 Maple. Michigan. 4050006 Lower Grand. Michigan. 4050007 Thornapple. Michigan. 4060101 Pere Marquette-White. Michigan 4060102 Muskegon. Michigan 4060103 Manistee. Michigan. 4060104 Betsie-Platte. Michigan 4060105 Boardman-Charlevoix. Michigan 4060106 Manistique. Michigan 4060107 Brevoort-Millecoquins. Michigan 4060200 Lake Michigan. Illinois, Indiana, Michigan, Wisconsin. 4070001 St. Marys. Michigan. 4070002 Carp-Pine. Michigan. 4070003 Lone Lake-Ocqueoc. Michigan. 4070004 Cheboygan. Michigan. 4070005 Black. Michigan. 4070006 Thunder Bay. Michigan. 4070007 Au Sable. Michigan. 4080101 Au Gres-Rifle. Michigan. 4080102 Kawkawlin-Pine. Michigan. 4080103 Pigeon-Wiscoggin. Michigan. 4080104 Birch-Willow. Michigan. 4080201 Tittabawassee. Michigan. 4080202 Pine. Michigan. 4080203 Shiawassee. Michigan. 4080204 Flint. Michigan. 4080205 Cass. Michigan. 4080206 Saginaw. Michigan. 4080300 Lake Huron. Michigan. 4090001 St. Clair. Michigan. 4090002 Lake St. Clair. Michigan. 4090003 Clinton. Michigan. 4090004 Detroit. Michigan. 4090005 Huron. Michigan. 4100001 Ottawa-Stony. Michigan, Ohio. 4100002 Raisin. Michigan, Ohio. 4100003 St. Joseph. Indiana, Michigan, Ohio. 4100004 St. Marys. Indiana, Ohio. 4100005 Upper Maumee. Indiana, Ohio. 4100006 Tiffin. Michigan, Ohio. 4100007 Auglaize. Indiana, Ohio. 4100008 Blanchard. Ohio. 4100009 Lower Maumee. Ohio. 4100010 Cedar-Portage. Ohio. 4100011 Sandusky. Ohio. 4100012 Huron-Vermilion. Ohio. 4110001 Black-Rocky. Ohio. 4110002 Cuyahoga. Ohio. 4110003 Ashtabula-Chagrin. Ohio, Pennsylvania. 4110004 Grand. Ohio. 4120101 Chautauqua-Conneaut. New York, Ohio, Pennsylvania. 4120102 Cattaraugus. New York. 4120103 Buffalo-Eighteenmile. New York. 4120104 Niagara. New York. 4120200 Lake Erie. Michigan, New York, Ohio, Pennsylvania. 4130001 Oak Orchard-Twelvemile. New York. 4130002 Upper Genesee. New York, Pennsylvania. 4130003 Lower Genesee. New York. 4140101 Irondequoit-Ninemile. New York. 4140102 Salmon-Sandy. New York. 4140201 Seneca. New York. 4140202 Oneida. New York. 4140203 Oswego. New York. 4150101 Black. New York. 4150102 Chaumont-Perch. New York. 4150200 Lake Ontario. New York. 4150301 Upper St. Lawrence. New York. 4150302 Oswegatchie. New York. 4150303 Indian. New York. 4150304 Grass. New York. 4150305 Raquette. New York. 4150306 St. Regis. New York. 4150307 English-Salmon. New York.
5 Ohio Region 5010001 Upper Allegheny. Pennsylvania, New York. 5010002 Conewango. Pennsylvania, New York. 5010003 Middle Allegheny-Tionesta. Pennsylvania. 5010004 French. Pennsylvania, New York. 5010005 Clarion. Pennsylvania. 5010006 Middle Allegheny-Redbank. New York. 5010007 Conemaugh. Pennsylvania. 5010008 Kiskiminetas. Pennsylvania. 5010009 Lower Allegheny. Pennsylvania. 5020001 Tygart Valley. West Virginia. 5020002 West Fork. West Virginia. 5020003 Upper Monongahela. Pennsylvania, West Virginia. 5020004 Cheat. Pennsylvania, West Virginia. 5020005 Lower Monongahela. Pennsylvania, West Virginia. 5020006 Youghiogheny. Maryland, Pennsylvania, West Virginia. 5030101 Upper Ohio. Ohio, Pennsylvania, West Virginia. 5030102 Shenango. Ohio, Pennsylvania. 5030103 Mahoning. Ohio, Pennsylvania. 5030104 Beaver. Pennsylvania. 5030105 Connoquenessing. Pennsylvania. 5030106 Upper Ohio-Wheeling. Ohio, Pennsylvania, West Virginia. 5030201 Little Musringum-Middle Island. Ohio, West Virginia. 5030202 Upper Ohio-Shade. Ohio, West Virginia. 5030203 Little Kanawha. West Virginia. 5030204 Hocking. Ohio. 5040001 Tuscarawas. Ohio. 5040002 Mohican. Ohio. 5040003 Walhonding. Ohio. 5040004 Muskingum. Ohio. 5040005 Wills. Ohio. 5040006 Licking. Ohio. 5050001 Upper New. North Carolina, Virginia. 5050002 Middle New. Virginia, West Virginia. 5050003 Greenbrier. West Virginia. 5050004 Lower New. West Virginia. 5050005 Gauley. West Virginia. 5050006 Upper Kanawha. West Virginia. 5050007 Elk. West Virginia. 5050008 Lower Kanawha. West Virginia. 5050009 Coal. West Virginia. 5060001 Upper Scioto. Ohio. 5060002 Lower Scioto. Ohio. 5060003 Paint. Ohio. 5070101 Upper Guyandotte. West Virginia. 5070102 Lower Guyandotte. West Virginia. 5070201 Tug. Kentucky, Virginia, West Virginia. 5070202 Upper Levisa. Kentucky, Virginia. 5070203 Lower Levisa. Kentucky. 5070204 Big Sandy. Kentucky, West Virginia. 5080001 Upper Great Miami, Indiana, Ohio. 5080002 Lower Great Miami, Indiana, Ohio. 5080003 Whitewater. Indiana, Ohio. 5090101 Raccoon-Symmes. Ohio, West Virginia. 5090102 Twelvepole. West Virginia. 5090103 Little Scioto-Tygarts. Kentucky, Ohio. 5090104 Little Sandy. Kentucky. 5090201 Ohio Brush-Whiteoak. Kentucky, Ohio. 5090202 Little Miami. Ohio. 5090203 Midle Ohio-Laughery. Indiana, Kentucky, Ohio. 5100101 Licking. Kentucky. 5100102 South Fork Licking. Kentucky. 5100201 North Fork Kentucky. Kentucky. 5100202 Middle Fork Kentucky. Kentucky. 5100203 South Fork Kentucky. Kentucky. 5100204 Upper Kentucky. Kentucky. 5100205 Lower Kentucky. Kentucky. 5110001 Upper Green. Kentucky. 5110002 Barren. Kentucky, Tennessee. 5110003 Middle Green. Kentucky. 5110004 Rough. Kentucky. 5110005 Lower Green. Kentucky. 5110006 Pond. Kentucky. 5120101 Upper Wabash. Indiana, Ohio. 5120102 Salamonie. Indiana. 5120103 Mississinewa. Indiana, Ohio. 5120104 Eel. Indiana. 5120105 Middle Wabash-Deer. Indiana. 5120106 Tippecanoe. Indiana. 5120107 Wildcat. Indiana. 5120108 Middle Wabash-Little Vermilion. Illinois, Indiana. 5120109 Vermilion. Illinois, Indiana. 5120110 Sugar. Indiana. 5120111 Middle Wabash-Busseron. Illinois, Indiana. 5120112 Embarras. Illinois. 5120113 Lower Wabash. Illinois, Indiana. 5120114 Little Wabash. Illinois. 5120115 Skillet. Illinois. 5120201 Upper White. Indiana. 5120202 Lower White. Indiana. 5120203 Eel. Indiana. 5120204 Driftwood. Indiana. 5120205 Flatrock-Haw. Indiana. 5120206 Upper East Fork White. Indiana. 5120207 Muscatatuck. Indiana. 5120208 Lower East Fork White. Indiana. 5120209 Patoka. Indiana. 5130101 Upper Cumberland. Kentucky, Tennessee. 5130102 Rockcastle. Kentucky. 5130103 Upper Cumberland-Lake Cumberland. Kentucky, Tennessee. 5130104 South Fork Cumberland. Kentucky, Tennessee. 5130105 Obey. Kentucky, Tennessee. 5130106 Upper Cumberland-Cordell Hull Reservoir. Tennessee. 5130107 Collins. Tennessee. 5130108 Caney. Tennessee. 5130201 Lower Cumberland-Old Hickory Lake. Tennessee. 5130202 Lower Cumberland-Sycamore. Tennessee. 5130203 Stones. Tennessee. 5130204 Harpeth. Tennessee. 5130205 Lower Cumberland. Kentucky, Tennessee. 5130206 Red. Kentucky, Tennessee. 5140101 Silver-Little Kentucky. Indiana, Kentucky. 5140102 Salt. Kentucky. 5140103 Rolling Fork. Kentucky. 5140104 Blue-Sinking. Kentucky, Indiana. 5140201 Lower Ohio-Little Pigeon. Indiana. 5140202 Highland-Pigeon. Indiana, Kentucky. 5140203 Lower Ohio-Bay. Illinois, Kentucky. 5140204 Saline. Illinois. 5140205 Tradewater. Kentucky. 5140206 Lower Ohio. Illinois, Kentucky.
6 Tennessee Region 6010101 North Fork Holston. Tennessee, Virginia. 6010102 South Fork Holston. Tennessee, Virginia. 6010103 Watauga, North Carolina, Tennessee. 6010104 Holston. Tennessee. 6010105 Upper French Broad. North Carolina, Tennessee. 6010106 Pigeon. North Carolina, Tennessee. 6010107 Lower French Broad. Tennessee. 6010108 Nolichucky. North Carolina, Tennessee. 6010201 Watts Bar Lake. Tennessee. 6010202 Upper Little Tennessee. Georgia, North Carolina. 6010203 Tuckasegee. North Carolina. 6010204 Lower Little Tennessee. North Carolina, Tennessee. 6010205 Upper Clinch, Tennessee, Virginia. 6010206 Powell. Tennessee, Virginia. 6010207 Powell. Tennessee. 6010208 Emory. Tennessee. 6020001 Middle Tennessee-Chickamauga. Alabama, Georgia, Tennessee. 6020002 Hiwassee. Georgia, North Carolina, Tennessee. 6020003 Ocoee. Georgia, North Carolina, Tennessee. 6020004 Sequatchie. Tennessee. 6030001 Guntersville Lake. Alabama, Georgia, Tennessee. 6030002 Wheeler Lake. Alabama,Tennessee. 6030003 Upper Elk. Alabama,Tennessee. 6030004 Lower Elk. Alabama,Tennessee. 6030005 Pickwick Lake. Alabama, Mississippi, Tennessee. 6030006 Bear. Alabama, Mississippi. 6040001 Lower Tennessee-Beech. Mississippi, Tennessee. 6040002 Upper Duck. Tennessee. 6040003 Lower Duck. Tennessee. 6040004 Buffalo. Tennessee. 6040005 Kentucky Lake. Kentucky, Tennessee. 6040006 Lower Tennessee. Kentucky, Tennessee.
7 Upper Mississippi Region 7010101 Mississippi Headwaters. Minnesota. 7010102 No name given 7010103 Prairie-Willow. Minnesota. 7010104 Elk-Nokasippi. Minnesota. 7010105 Pine. Minnesota. 7010106 Crow Wing. Minnesota. 7010107 Redeye. Minnesota. 7010108 Long Prairie. Minnesota. 7010201 Platte-Spunk. Minnesota. 7010202 Sauk. Minnesota. 7010203 Clearwater-Elk. Minnesota. 7010204 Crow. Minnesota. 7010205 South Fork Crow. Minnesota. 7010206 Twin Cities. Minnesota. 7010207 Rum. Minnesota. 7020001 Upper Minnesota. Minnesota, South Dakota. 7020002 Pomme De Terre. Minnesota. 7020003 Lac Qui Parle. South Dakota, Minnesota. 7020004 Hawk-Yellow Medicine. Minnesota. 7020005 Chippewa. Minnesota. 7020006 Redwood. Minnesota. 7020007 Middle Minnesota. Minnesota. 7020008 Cottonwood. Minnesota. 7020009 Blue Earth. Iowa, Minnesota. 7020010 Watonwan. Minnesota. 7020011 Le Sueur. Minnesota. 7020012 Lower Minnesota. Minnesota. 7030001 Upper St. Croix. Minnesota, Wisconsin. 7030002 Namekagon. Wisconsin. 7030003 Kettle. Minnesota. 7030004 Snake. Minnesota. 7030005 Lower St. Croix. Minnesota, Wisconsin. 7040001 Rush-Vermillion. Minnesota, Wisconsin. 7040002 Cannon. Minnesota. 7040003 Buffalo-Whitewater. Minnesota, Wisconsin. 7040004 Zumbro. Minnesota. 7040005 Trempealeau. Wisconsin. 7040006 La Crosse-Pine. Minnesota, Wisconsin. 7040007 Black. Wisconsin. 7040008 Root. Iowa, Minnesota. 7050001 Upper Chippewa. Wisconsin. 7050002 Flambeau. Michigan, Wisconsin. 7050003 South Fork Flambeau. Wisconsin. 7050004 Jump. Wisconsin. 7050005 Lower Chippewa. Wisconsin. 7050006 Eau Claire. Wisconsin. 7050007 Red Cedar. Wisconsin. 7060001 Coon-Yellow. Iowa, Minnesota, Wisconsin. 7060002 Upper Iowa. Iowa, Minnesota. 7060003 Grant-Little Maquoketa. Iowa, Wisconsin. 7060004 Turkey. Iowa. 7060005 Apple-Plum. Illinois, Iowa, Wisconsin. 7060006 Maquoketa. Iowa. 7070001 Upper Wisconsin. Michigan, Wisconsin. 7070002 Lake Dubay. Wisconsin. 7070003 Castle Rock. Wisconsin. 7070004 Baraboo. Wisconsin. 7070005 Lower Wisconsin. Wisconsin. 7070006 Kickapoo. Wisconsin. 7080101 Copperas-Duck. Illinois, Iowa. 7080102 Upper Wapsipinicon. Iowa, Minnesota. 7080103 Lower Wapsipinicon. Iowa. 7080105 South Skunk. Iowa. 7080106 North Skunk. Iowa. 7080107 Skunk. Iowa. 7080201 Upper Cedar. Iowa, Minnesota. 7080202 Shell Rock. Iowa, Minnesota. 7080203 Winnebago. Iowa, Minnesota. 7080204 West Fork Cedar. Iowa. 7080205 Middle Cedar. Iowa. 7080206 Lower Cedar. Iowa. 7080207 Upper Iowa. Iowa. 7080208 Middle Iowa. Iowa. 7080209 Lower Iowa. Iowa. 7090001 Upper Rock. Illinois, Wisconsin. 7090002 Crawfish. Wisconsin. 7090003 Pecatonica. Illinois, Wisconsin. 7090004 Sugar. Illinois, Wisconsin. 7090005 Lower Rock. Illinois, Wisconsin. 7090006 Kishwaukee. Illinois, Wisconsin. 7090007 Green. Illinois. 7100001 Des Moines Headwaters. Minnesota. 7100002 Upper Des Moines. Iowa, Minnesota. 7100003 East Fork Des Moines. Iowa, Minnesota. 7100004 Middle Des Moines. Iowa. 7100005 Boone. Iowa. 7100006 North Raccoon. Iowa. 7100007 South Raccoon. Iowa. 7100008 Lake Red Rock. Iowa. 7100009 Lower Des Moines. Iowa, Missouri. 7110002 North Fabius. Iowa, Missouri. 7110003 South Fabius. Missouri. 7110004 The Sny. Illinois, Missouri. 7110005 North Fork Salt. Missouri. 7110006 South Fork Salt. Missouri. 7110007 Salt. Missouri. 7110008 Cuivre. Missouri. 7110009 Peruque-Piasa. Illinois, Missouri. 7120001 Kankakee. Illionois, Indiana, Michigan. 7120002 Iroquois. Illionois, Indiana. 7120003 Chicago. Illionois, Indiana. 7120004 Des Plaines. Illinois, Wisconsin. 7120005 Upper Illinois. Illinois. 7120006 Upper Fox. Illinois, Wisconsin. 7120007 Lower Fox. Illinois. 7130001 Lower Illinois-Senachwine Lake. Illinois. 7130002 Vermilion. Illinois. 7130003 Lower Illinois-Lake Chautauqua. Illinois. 7130004 Mackinaw. Illinois. 7130005 Spoon. Illinois. 7130006 Upper Sangamon. Illinois. 7130007 South Fork Sangamon. Illinois. 7130008 Lower Sangamon. Illinois. 7130009 Salt. Illinois. 7130010 La Moine. Illinois. 7130011 Lower Illinois. Illinois. 7130012 Macoupin. Illinois. 7140101 Cahokia-Joachim. Illinois, Missouri. 7140102 Meramec. Missouri. 7140103 Bourbeuse. Missouri. 7140104 Big. Missouri. 7140105 Upper Mississippi-Cape Girardeau. Illinois, Missouri. 7140106 Big Muddy. Illinois. 7140107 Whitewater. Missouri. 7140108 Cache. Illinois. 7140201 Upper Kaskaskia. Illinois. 7140202 Middle Kaskaskia. Illinois. 7140203 Shoal. Illinois. 7140204 Lower Kaskaskia. Illinois.
8 Lower Mississippi Region 8010100 Lower Mississippi-Memphis. AR, KY, MS, MO, TN. 8010201 Bayou De Chien-Mayfield. Kentucky, Tennessee. 8010202 Obion. Kentucky, Tennessee. 8010203 South Fork Obion. Tennessee. 8010204 North Fork Forked Deer. Tennessee. 8010205 South Fork Forked Deer. Tennessee. 8010206 Forked Deer. Tennessee. 8010207 Upper Hatchie. Mississippi, Tennessee. 8010208 Lower Hatchie. Mississippi, Tennessee. 8010209 Loosahatchie. Tennessee. 8010210 Wolf. Mississippi, Tennessee. 8010211 Horn Lake-Nonconnah. Mississippi, Tennessee. 8020100 Lower Mississippi-Helena. Arkansas, Mississippi. 8020201 New Madrid-St. Johns. Missouri. 8020202 Upper St. Francis. Missouri. 8020203 Lower St. Francis. Arkansas, Missouri. 8020204 Little River Ditches. Arkansas. 8020205 LAnguille. Arkansas.' 8020301 Lower White-Bayou Des Arc. Arkansas. 8020302 Cache. Arkansas, Missouri. 8020303 Lower White. Arkansas. 8020304 Big. Arkansas. 8020401 Lower Arkansas. Arkansas. 8020402 Bayou Meto. Arkansas. 8030100 Lower Mississippi-Greenville. Arkansas, Louisana, Mississipp 8030201 Little Tallahatchie. Mississippi. 8030202 Tallahatchie. Mississippi. 8030203 Yocona. Mississippi. 8030204 Coldwater. Mississippi, Tennessee. 8030205 Yalobusha. Mississippi. 8030206 Upper Yazoo. Mississippi. 8030207 Big Sunflower. Mississippi. 8030208 Lower Yazoo. Louisiana, Mississippi. 8030209 Deer-Steele. Louisiana, Mississippi. 8040101 Ouachita Headwaters. Arkansas. 8040102 Upper Ouachita. Arkansas. 8040103 Little Missouri. Arkansas. 8040201 Lower Ouachita-Smackover. Arkansas. 8040202 Lower Ouachita-Bayou De Loutre. Arkansas, Louisiana. 8040203 Upper Saline. Arkansas. 8040204 Lower Saline. Arkansas. 8040205 Bayou Bartholomew. Arkansas, Louisiana. 8040206 Bayou DArbonne. Arkansas, Louisiana.' 8040207 Lower Ouachita. Louisiana. 8040301 Lower Red. Louisiana. 8040302 Castor. Louisiana. 8040303 Dugdemona. Louisiana. 8040304 Little. Louisiana. 8040305 Black. Louisiana. 8040306 Bayou Cocodrie. Louisiana. 8050001 Boeuf. Arkansas, Louisiana. 8050002 Bayou Macon. Arkansas, Louisiana. 8050003 Tensas. Louisiana. 8060100 Lower Mississippi-Natchez. Louisiana, Mississippi. 8060201 Upper Big Black. Mississippi. 8060202 Lower Big Black. Louisiana, Mississippi. 8060203 Bayou Pierre. Louisiana, Mississippi. 8060204 Coles Creek. Louisiana, Mississippi. 8060205 Homochitto. Mississippi. 8060206 Buffalo. Mississippi. 8070100 Lower Mississippi-Baton Rouge. Louisiana. 8070201 Bayou Sara-Thompson. Louisiana, Mississippi. 8070202 Amite. Louisiana, Mississippi. 8070203 Tickpaw. Louisiana, Mississippi. 8070204 Lake Maurepas. Louisiana. 8070205 Tangipahoa. Louisiana, Mississippi. 8070300 Lower Grand. Louisiana. 8080101 Atchafalaya. Louisiana. 8080102 Bayou Teche. Louisiana. 8080103 Vermillion. Louisana. 8080201 Mermentau Headwaters. Louisiana. 8080202 Mermentau. Louisiana. 8080203 Upper Calcasieu. Louisiana. 8080204 Whiskey Chitto. Louisiana. 8080205 West Fork Calcasieu. Louisiana. 8080206 Lower Calcasieu. Louisiana. 8090100 Lower Mississippi-New Orleans. Louisiana. 8090201 Liberty Bayou-Tchefuncta. Louisiana. 8090202 Lake Pontchartrain. Louisiana. 8090203 Eastern Louisiana Coastal. Louisiana. 8090301 East Central Louisiana Coastal. Louisiana. 8090302 West Central Louisiana Coastal. Louisiana.
9 Souris-Red-Rainy Region 9010001 Upper Souris. North Dakota. 9010002 Des Lacs. North Dakota. 9010003 Lower Souris. North Dakota. 9010004 Willow. North Dakota. 9010005 Deep. North Dakota. 9020101 Bois De Sioux. Minnesota, North Dakota, South Dakota. 9020102 Mustinka. Minnesota. 9020103 Otter Tail. Minnesota. 9020104 Upper Red. Minnesota, North Dakota. 9020105 Western Wild Rice. North Dakota, South Dakota. 9020106 Buffalo. Minnesota. 9020107 Elm-Marsh. Minnesota, North Dakota. 9020108 Eastern Wild Rice. Minnesota. 9020109 Goose. North Dakota. 9020201 Devils Lake. North Dakota. 9020202 Upper Sheyenne. North Dakota. 9020203 Middle Sheyenne. North Dakota. 9020204 Lower Sheyenne. North Dakota. 9020205 Maple. North Dakota. 9020301 Sandhill-Wilson. Minnesota, North Dakota. 9020302 Red Lakes. Minnesota. 9020303 Red Lake. Minnesota. 9020304 Thief. Minnesota. 9020305 Clearwater. Minnesota. 9020306 Grand Marais-Red. Minnesota, North Dakota. 9020307 Turtle. North Dakota. 9020308 Forest. North Dakota. 9020309 Snake. Minnesota. 9020310 Park. North Dakota. 9020311 Lower Red. Minnesota, North Dakota. 9020312 Two Rivers. Minnesota. 9020313 Pembina. North Dakota. 9020314 Roseau. Minnesota. 9030001 Rainy Headwaters. Minnesota. 9030002 Vermilion. Minnesota. 9030003 Rainy Lake. Minnesota. 9030004 Upper Rainy. Minnesota. 9030005 Little Fork. Minnesota. 9030007 Rapid. Minnesota. 9030008 Lower Rainy. Minnesota. 9030009 Lake of the Woods. Minnesota.
10 Missouri Region 10010001 Belly. Montana. 10010002 St. Mary. Montana. 10020001 Red Rock. Montana. 10020002 Beaverhead. Montana. 10020003 Ruby. Montana. 10020004 Big Hole. Montana. 10020005 Jefferson. Montana. 10020006 Boulder. Montana. 10020007 Madison. Montana, Wyoming. 10020008 Gallatin. Montana, Wyoming. 10030101 Upper Missouri. Montana. 10030102 Upper Missouri-Dearborn. Montana. 10030103 Smith. Montana. 10030104 Sun. Montana. 10030105 Belt. Montana. 10030201 Two Medicine. Montana. 10030202 Cut Bank. Montana. 10030203 Marias. Montana. 10030204 Willow. Montana. 10030205 Teton. Montana. 10040101 Bullwhacker-Dog. Montana. 10040102 Arrow. Montana. 10040103 Judith. Montana. 10040104 Fort Peck Reservoir. Montana. 10040105 Big Dry. Montana. 10040106 Little Dry. Montana. 10040201 Upper Musselshell. Montana. 10040202 Middle Musselshell. Montana. 10040203 Flatwillow. Montana. 10040204 Box Elder. Montana. 10040205 Lower Musselshell. Montana. 10050001 Milk Headwaters. Montana. 10050002 Upper Milk. Montana. 10050003 Wild Horse Lake. Montana. 10050004 Middle Milk. Montana. 10050005 Big Sandy. Montana. 10050006 Sage. Montana. 10050007 Lodge. Montana. 10050008 Battle. Montana. 10050009 Peoples. Montana. 10050010 Cottonwood. Montana. 10050011 Whitewater. Montana. 10050012 Lower Milk. Montana. 10050013 Frenchman. Montana. 10050014 Beaver. Montana. 10050015 Rock. Montana. 10050016 Porcupine. Montana. 10060001 Prairie Elk-Wolf. Montana. 10060002 Redwater. Montana. 10060003 Poplar. Montana. 10060004 West Fork Poplar. Montana. 10060005 Charlie-Little Muddy. Montana, North Dakota. 10060006 Big Muddy. Montana, North Dakota. 10060007 Brush Lake Closed Basin. Montana, North Dakota. 10070001 Yellowstone Headwaters. Montana, Wyoming. 10070002 Upper Yellowstone. Montana, Wyoming. 10070003 Shields. Montana. 10070004 Upper Yellowstone-Lake Basin. Montana. 10070005 Stillwater. Montana. 10070006 Clarks Fork Yellowstone. Montana, Wyoming. 10070007 Upper Yellowstone-Pompeys Pillar. Montana. 10070008 Pryor. Montana. 10080001 Upper Wind. Wyoming. 10080002 Little Wind. Wyoming. 10080003 Popo Agie. Wyoming. 10080004 Muskrat. Wyoming. 10080005 Lower Wind. Wyoming. 10080006 Badwater. Wyoming. 10080007 Upper Bighorn. Wyoming. 10080008 Nowood. Wyoming. 10080009 Greybull. Wyoming. 10080010 Big Horn Lake. Montana, Wyoming. 10080011 Dry. Wyoming. 10080012 North Fork Shoshone. Wyoming. 10080013 South Fork Shoshone. Wyoming. 10080014 Shoshone. Wyoming. 10080015 Lower Bighorn. Montana. 10080016 Little Bighorn. Montana, Wyoming. 10090101 Upper Tongue. Montana, Wyoming. 10090102 Lower Tongue. Montana. 10090201 Middle Fork Powder. Wyoming. 10090202 Upper Powder. Wyoming. 10090203 South Fork Powder. Wyoming. 10090204 Salt. Wyoming. 10090205 Crazy Woman. Wyoming. 10090206 Clear. Wyoming. 10090207 Middle Powder. Montana, Wyoming. 10090208 Little Powder. Montana, Wyoming. 10090209 Lower Powder. Montana. 10090210 Mizpah. Montana. 10100001 Lower Yellowstone-Sunday. Montana. 10100002 Big Porcupine. Montana. 10100003 Rosebud. Montana. 10100004 Lower Yellowstone. Montana, North Dakota. 10100005 O Fallon. Montana. 10110101 Lake Sakakawea. North Dakota. 10110102 Little Muddy. North Dakota. 10110201 Upper Little Missouri. MT, ND, SD, WY. 10110202 Box Elder. Montana, North Dakota, South Dakota. 10110203 Middle Little Missouri. Montana, North Dakota. 10110204 Beaver. Montana, North Dakota. 10110205 Lower Little Missouri. North Dakota. 10120101 Antelope. Wyoming. 10120102 Dry Fork Cheyenne. Wyoming. 10120103 Upper Cheyenne. Wyoming. 10120104 Lance. Wyoming. 10120105 Lightning. Wyoming. 10120106 Angostura Reservoir. Nebraska, South Dakota, Wyoming. 10120107 Beaver. South Dakota, Wyoming. 10120108 Hat. Nebraska, South Dakota, Wyoming. 10120109 Middle Cheyenne-Spring. South Dakota. 10120110 Rapid. South Dakota. 10120111 Middle Cheyenne-Elk. South Dakota. 10120112 Lower Cheyenne. South Dakota. 10120113 Cherry. South Dakota. 10120201 Upper Belle Fourche. South Dakota, Wyoming 10120202 Lower Belle Fourche. Montana, South Dakota, Wyoming 10120203 Redwater. South Dakota, Wyoming. 10130101 Painted Woods-Square Butte. North Dakota 10130102 Upper Lake Oahe. North Dakota, South Dakota. 10130103 Apple. North Dakota. 10130104 Beaver. North Dakota. 10130105 Lower Lake Oahe. South Dakota. 10130106 West Missouri Coteau. North Dakota, South Dakota. 10130201 Knife. North Dakota. 10130202 Upper Heart. North Dakota. 10130203 Lower Heart. North Dakota. 10130204 Upper Cannonball. North Dakota. 10130205 Clear. North Dakota, South Dakota. 10130206 Lower Cannonball. North Dakota. 10130301 North Fork Grand. North Dakota, South Dakota. 10130302 South Fork Grand. South Dakota. 10130303 Grand. North Dakota, South Dakota. 10130304 South Fork Moreau. South Dakota. 10130305 Upper Moreau. South Dakota. 10130306 Lower Moreau. South Dakota. 10140101 Fort Randall Reservoir. South Dakota. 10140102 Bad. South Dakota. 10140103 Medicine Knoll. South Dakota. 10140104 Medicine. South Dakota. 10140105 Crow. South Dakota. 10140201 Upper White. Nebraska, South Dakota. 10140202 Middle White. South Dakota. 10140203 Little White. Nebraska, South Dakota. 10140204 Lower White. South Dakota. 10150001 Ponca. Nebraska, South Dakota. 10150002 Niobrara Headwaters. Nebraska, Wyoming. 10150003 Upper Niobrara. Nebraska, South Dakota. 10150004 Middle Niobrara. Nebraska, South Dakota. 10150005 Snake. Nebraska. 10150006 Keya Paha. Nebraska, South Dakota. 10150007 Lower Niobrara. Nebraska. 10160001 James Headwaters. North Dakota. 10160002 Pipestem. North Dakota. 10160003 Upper James. North Dakota, South Dakota. 10160004 Elm. North Dakota, South Dakota. 10160005 Mud. South Dakota. 10160006 Middle James. South Dakota. 10160007 East Missouri Coteau. South Dakota. 10160008 Snake. South Dakota. 10160009 Turtle. South Dakota. 10160010 North Big Soiux Coteau. South Dakota. 10160011 Lower James. South Dakota. 10170101 Lewis and Clark Lake. Nebraska, South Dakota. 10170102 Vermillion. South Dakota. 10170103 South Big Soiux Coteau. South Dakota. 10170201 Middle Big Soiux Coteau. South Dakota. 10170202 Upper Big Soiux. Minnesota, South Dakota. 10170203 Lower Big Soiux. Iowa, Minnesota, South Dakota. 10170204 Rock. Iowa, Minnesota. 10180001 North Platte Headwaters. Colorado. 10180002 Upper North Platte. Colorado, Wyoming. 10180003 Pathfinder-Seminoe Reservoirs. Wyoming. 10180004 Medicine Bow. Wyoming. 10180005 Little Medicine Bow. Wyoming. 10180006 Sweetwater. Wyoming. 10180007 Middle North Platte-Casper. Wyoming. 10180008 Glendo Reservoir. Wyoming. 10180009 Middle North Platte-Scotts Bluff. Nebraska, Wyoming. 10180010 Upper Laramie. Colorado, Wyoming. 10180011 Lower Laramie. Wyoming. 10180012 Horse. Nebraska, Wyoming. 10180013 Pumpkin. Nebraska, Wyoming. 10180014 Lower North Platte. Nebraska. 10190001 South Platte Headwater. Colorado. 10190002 Upper Southe Platte. Colorado. 10190003 Middle South Platte-Cherry Creek. Colorado. 10190004 Clear. Colorado. 10190005 St. Vrain. Colorado. 10190006 Big Thompson. Colorado. 10190007 Cache La Poudre. Colorado, Wyoming. 10190008 Lone Tree-Owl. Colorado, Wyoming. 10190009 Crow. Colorado, Wyoming. 10190010 Kiowa. Colorado. 10190011 Bijou. Colorado. 10190012 Middle South Platte-Sterling. Colorado, Nebraska. 10190013 Beaver. Colorado. 10190014 Pawnee. Colorado. 10190015 Upper Lodgepole. Colorado, Nebraska, Wyoming. 10190016 Lower Lodgepole. Colorado, Nebraska, Wyoming. 10190017 Sidney Draw. Colorado, Nebraska, Wyoming. 10190018 Lower South Platte. Colorado, Nebraska. 10200101 Middle Platte-Buffalo. Nebraska. 10200102 Wood. Nebraska. 10200103 Middle Platte-Prairie. Nebraska. 10200201 Lower Platte-Shell. Nebraska. 10200202 Lower Platte. Nebraska. 10200203 Salt. Nebraska. 10210001 Upper Middle Loup. Nebraska. 10210002 Dismal. Nebraska. 10210003 Lower Middle Loup. Nebraska. 10210004 South Loup. Nebraska. 10210005 Mud. Nebraska. 10210006 Upper North Loup. Nebraska. 10210007 Lower North Loup. Nebraska. 10210008 Calamus. Nebraska. 10210009 Loup. Nebraska. 10210010 Cedar. Nebraska. 10220001 Upper Elkhorn. Nebraska. 10220002 North Fork Elkhorn. Nebraska. 10220003 Lower Elkhorn. Nebraska. 10220004 Logan. Nebraska. 10230001 Blackbird-Soldier. Iowa, Nebraska. 10230002 Floyd. Iowa. 10230003 Little Sioux. Iowa, Minnesota. 10230004 Monona-Harrison Ditch. Iowa. 10230005 Maple. Iowa. 10230006 Big Papillion-Mosquito. Iowa, Nebraska. 10230007 Boyer. Iowa. 10240001 Keg-Weeping Water. Iowa, Missouri, Nebraska. 10240002 West Nishnabotna. Iowa. 10240003 East Nishnabotna. Iowa. 10240004 Nishnabotna. Iowa, Missouri. 10240005 Tarkio-Wolf. Iowa, Kansas, Missouri. 10240006 Little Nemaha. Nebraska. 10240007 South Fork Big Nemaha. Kansas, Nebraska. 10240008 Big Nemaha. Kansas, Nebraska. 10240009 West Nowaway. Iowa, Missouri. 10240010 Nowaway. Iowa, Missouri. 10240011 Independence-Sugar. Kansas, Missouri. 10240012 Platte. Iowa, Missouri. 10240013 One Hundred and two. Iowa, Missouri. 10250001 Arikaree. Colorado, Kansas, Nebraska. 10250002 North Fork Republican. Colorado, Kansas, Nebraska. 10250003 South Fork Republican. Colorado, Kansas, Nebraska. 10250004 Upper Republican. Colorado, Kansas, Nebraska. 10250005 Frenchman. Colorado, Nebraska. 10250006 Stinking Water. Colorado, Nebraska. 10250007 Red Willow. Nebraska. 10250008 Medicine. Nebraska. 10250009 Harlan County Reservoir. Kansas, Nebraska. 10250010 Upper Sappa. Kansas. 10250011 Lower Sappa. Kansas, Nebraska. 10250012 South Fork Beaver. Colorado, Kansas. 10250013 Little Beaver. Colorado, Kansas. 10250014 Beaver. Kansas, Nebraska. 10250015 Prairie Dog. Kansas, Nebraska. 10250016 Middle Republican. Kansas, Nebraska. 10250017 Lower Republican. Kansas. 10260001 Smoky Hill Headwaters. Colorado, Kansas. 10260002 North Fork Smoky Hill. Colorado, Kansas. 10260003 Upper Smoky Hill. Kansas. 10260004 Ladder. Colorado, Kansas. 10260005 Hackberry. Kansas. 10260006 Middle Smoky Hill. Kansas. 10260007 Big. Kansas. 10260008 Lower Smoky Hill. Kansas. 10260009 Upper Saline. Kansas. 10260010 Lower Saline. Kansas. 10260011 Upper North Fork Solomon. Kansas. 10260012 Lower North Fork Solomon. Kansas. 10260013 Upper South Fork Solomon. Kansas. 10260014 Lower South Fork Solomon. Kansas. 10260015 Solomon. Kansas. 10270101 Upper Kansas. Kansas. 10270102 Middle Kansas. Kansas. 10270103 Delaware. Kansas. 10270104 Lower Kansas, Kansas. Missouri. 10270201 Upper Big Blue. Nebraska. 10270202 Middle Big Blue. Nebraska. 10270203 West Fork Big Blue. Nebraska. 10270204 Turkey. Nebraska. 10270205 Lower Big Blue. Kansas, Nebraska. 10270206 Upper Little Blue. Kansas, Nebraska. 10270207 Lower Little Blue. Kansas, Nebraska. 10280101 Upper Grand. Iowa, Missouri. 10280102 Thompson. Iowa, Missouri. 10280103 Lower Grand. Iowa, Missouri. 10280201 Upper Chariton. Iowa, Missouri. 10280202 Lower Chariton. Missouri. 10280203 Little Chariton. Missouri. 10290101 Upper Marais Des Cygnes. Kansas. 10290102 Lower Marais Des Cygnes. Kansas, Missouri. 10290103 Little Osage. Kansas, Missouri. 10290104 Marmaton. Kansas, Missouri. 10290105 Harry S. Truman Reservoir. Missouri. 10290106 Sac. Missouri. 10290107 Pomme De Terre. Missouri. 10290108 South Grand. Kansas, Missouri. 10290109 Lake of the Ozarks. Missouri. 10290110 Niangua. Missouri. 10290111 Lower Osage. Missouri. 10290201 Upper Casconade. Missouri. 10290202 Big Piney. Missouri. 10290203 Lower Gasconade. Missouri. 10300101 Lower Missouri-Crooked. Kansas, Missouri. 10300102 Lower Missouri-Moreau. Missouri. 10300103 Lamine. Missouri. 10300104 Blackwater. Missouri. 10300200 Lower Missouri. Missouri.
11 Arkansas-White-Red Region 11010001 Beaver Reservoir. Arkansas, Missouri. 11010002 James. Missouri. 11010003 Bull Shoals Lake. Arkansas, Missouri. 11010004 Middle White. Arkansas. 11010005 Buffalo. Arkansas. 11010006 North Fork White. Arkansas, Missouri. 11010007 Upper Black. Arkansas, Missouri. 11010008 Current. Arkansas, Missouri. 11010009 Lower Black. Arkansas, Missouri. 11010010 Spring. Arkansas, Missouri. 11010011 Eleven Point. Arkansas, Missouri. 11010012 Strawberry. Arkansas. 11010013 Upper White-Village. Arkansas. 11010014 Little Red. Arkansas. 11020001 Arkansas Headwaters. Colorado. 11020002 Upper Arkansas. Colorado. 11020003 Fountain. Colorado. 11020004 Chico. Colorado. 11020005 Upper Arkansas-Lake Meredith. Colorado. 11020006 Huerfano. Colorado. 11020007 Apishapa. Colorado. 11020008 Horse. Colorado. 11020009 Upper Arkansas-John Martin Reservoir. Colorado, Kansas. 11020010 Purgatorie. Colorado, New Mexico. 11020011 Big Sandy. Colorado. 11020012 Rush. Colorado. 11020013 Two Butte. Colorado. 11030001 Middle Arkansas-Lake McKinney. Colorado, Kansas. 11030002 Whitewoman. Colorado, Kansas. 11030003 Arkansas-Dodge City. Kansas. 11030004 Coon-Pickerel. Kansas. 11030005 Pawnee. Kansas. 11030006 Buckner. Kansas. 11030007 Upper Walnut Creek. Kansas. 11030008 Lower Walnut Creek. Kansas. 11030009 Rattlesnake. Kansas. 11030010 Gar-Peace. Kansas. 11030011 Cow. Kansas. 11030012 Little Arkansas. Kansas. 11030013 Middle Arkansas-Slate. Kansas. 11030014 North Fork Ninnescah. Kansas. 11030015 South Fork Ninnescah. Kansas. 11030016 Ninnescah. Kansas. 11030017 Upper Walnut River. Kansas. 11030018 Lower Walnut River. Kansas. 11040001 Cimarron Headwaters. Colorado, New Mexico, Oklahoma. 11040002 Upper Cimarron. Colorado, Kansas, New Mexico, Oklahoma. 11040003 North Fork Cimarron. Colorado, Kansas. 11040004 Sand Arroyo. Colorado, Kansas. 11040005 Bear. Colorado, Kansas. 11040006 Upper Cimarron-Liberal. Kansas, Oklahoma. 11040007 Crooked. Kansas, Oklahoma. 11040008 Upper Cimarron-Bluff. Kansas, Oklahoma. 11050001 Lower Cimarron-Eagle Chief. Kansas, Oklahoma. 11050002 Lower Cimarron-Skeleton. Oklahoma. 11050003 Lower Cimarron. Oklamoha. 11060001 Kaw Lake. Kansas, Oklahoma. 11060002 Upper Salt Fork Arkansas. Kansas, Oklahoma. 11060003 Medicine Lodge. Kansas, Oklahoma. 11060004 Lower Salt Fork Arkansas. Kansas, Oklahoma. 11060005 Chikaskia. Kansas, Oklahoma. 11060006 Black Bear-Red Rock. Oklahoma. 11070101 Upper Verdigris. Kansas. 11070102 Fall. Kansas. 11070103 Middle Verdigris. Kansas, Oklahoma. 11070104 Elk. Kansas. 11070105 Lower Verdigris. Oklahoma. 11070106 Caney. Kansas, Oklahoma. 11070107 Bird. Oklahoma. 11070201 Neosho Headwaters. Kansas. 11070202 Upper Cottonwood. Kansas. 11070203 Lower Cottonwood. Kansas. 11070204 Upper Neosho. Kansas. 11070205 Middle Neosho. Kansas, Oklahoma. 11070206 Lake O Cherokees. Arkansas, Kansas, Missouri, Oklahoma. 11070207 Spring. Kansas, Missouri, Oklahoma. 11070208 Elk. Arkansas, Missouri, Oklahoma. 11070209 Lower Neosho. Arkansas, Oklahoma. 11080001 Canadian Headwaters. Colorado, New Mexico. 11080002 Cimarron. New Mexico. 11080003 Upper Canadian. New Mexico. 11080004 Mora. New Mexico. 11080005 Conchas. New Mexico. 11080006 Upper Canadian-Ute Reservoir. Mew Mexico, Texas. 11080007 Ute. New Mexico. 11080008 Revuelto. New Mexico. 11090101 Middle Canadian-Trujillo. New Mexico, Texas. 11090102 Punta de Agua. New Mexico, Texas. 11090103 Rita Blanca. New Mexico, Oklahoma, Texas. 11090104 Carrizo. New Mexico, Texas. 11090105 Lake Meredith. Texas. 11090106 Middle Canadian-Spring. Texas. 11090201 Lower Canadian-Deer. Oklahoma,Texas. 11090202 Lower Canadian-Walnut. Oklahoma. 11090203 Little. Oklahoma. 11090204 Lower Canadian. Oklahoma. 11100101 Upper Beaver. New Mexico, Oklahoma, Texas. 11100102 Middle Beaver. Kansas, Oklahoma. 11100103 Coldwater. Oklahoma, Texas. 11100104 Palo Duro. Oklahoma, Texas. 11100201 Lower Beaver. Oklahoma, Texas. 11100202 Upper Wolf. Texas. 11100203 Lower Wolf. Oklahoma, Texas. 11100301 Middle North Canadian. Oklahoma. 11100302 Lower North Canadian. Oklahoma. 11100303 Deep Fork. Oklahoma. 11110101 Polecat-Snake. Oklahoma. 11110102 Dirty-Greenleaf. Oklahoma. 11110103 Illinois. Arkansas, Oklahoma. 11110104 Robert S. Kerr Reservoir. Arkansas, Oklahoma. 11110105 Poteau. Arkansas, Oklahoma. 11110201 Frog-Mulberry. Arkansas. 11110202 Dardanelle Reservoir. Arkansas. 11110203 Lake Conway-Point Remove. Arkansas. 11110204 Petit Jean. Arkansas. 11110205 Cadron. Arkansas. 11110206 Fourche La Fave. Arkansas. 11110207 Lower Arkansas-Maumelle. Arkansas. 11120101 Tierra Blanca. New Mexico, Texas. 11120102 Palo Duro. New Mexico, Texas. 11120103 Upper Prairie Dog Town Fork Red. Texas. 11120104 Tule. Texas. 11120105 Lower Prairie Dog Town Fork Red. Oklahoma, Texas. 11120201 Upper Salt Fork Red. Texas. 11120202 Lower Salt Fork Red. Texas. 11120301 Upper North Fork Red. Texas. 11120302 Middle North Fork Red. Oklahoma, Texas. 11120303 Lower North Fork Red. Oklahoma. 11120304 Elm Fork Red. Oklahoma, Texas. 11130101 Groesbeck-Sandy. Oklahoma, Texas. 11130102 Blue-China. Oklahoma, Texas. 11130103 North Pease. Texas. 11130104 Middle Pease. Texas. 11130105 Pease. Texas. 11130201 Farmers-Mud. Oklahoma, Texas. 11130202 Cache. Oklahoma. 11130203 West Cache. Oklahoma. 11130204 North Witchita. Texas. 11130205 South Witchita. Texas. 11130206 Witchita. Texas. 11130207 Southern Beaver. Texas 11130208 Norhtern Beaver. Oklahoma. 11130209 Little Witchita. Texas. 11130210 Lake Texoma. Oklahoma, Texas. 11130301 Washita Headwaters. Oklahoma, Texas. 11130302 Upper Washita. Oklahoma. 11130303 Middle Washita. Oklahoma. 11130304 Lower Washita. Oklahoma. 11140101 Bois D Arc-Island. Oklahoma, Texas. 11140102 Blue. Oklahoma. 11140103 Muddy Boggy. Oklahoma. 11140104 Clear Boggy. Oklahoma. 11140105 Kiamichi. Arkansas, Oklahoma. 11140106 Pecan-Waterhole. Arkansas, Oklahoma, Texas. 11140107 Upper Little. Oklahoma. 11140108 Mountain Fork. Arkansas, Oklahoma. 11140109 Lower Little Arkansas, Oklahoma. 11140201 McKinney-Posten Bayous. Arkansas, Louisiana, Texas. 11140202 Middle Red-Coushatta. Louisiana. 11140203 Loggy Bayou. Arkansas, Louisiana. 11140204 Red Chute. Louisiana. 11140205 Bodcau Bayou. Arkansas, Louisiana. 11140206 Bayou Pierre. Louisiana. 11140207 Lower Red-Lake Latt. Louisiana. 11140208 Saline Bayou. Louisiana. 11140209 Black Lake Bayou. Louisiana. 11140301 Sulfur Headwater. Texas. 11140302 Lower Sulfer. Arkansas, Texas. 11140303 White Oak Bayou. Texas. 11140304 Cross Bayou. Arkansas, Louisiana, Texas. 11140305 Lake O the Fines. Texas. 11140306 Caddo Lake. Louisiana, Texas. 11140307 Little Cypress. Texas.
12 Texas-Gulf Region 12010001 Upper Sabine. Texas. 12010002 Middle Sabine. Louisiana, Texas. 12010003 Lake Fork. Texas. 12010004 Toledo Bend Reservoir. Louisiana, Texas. 12010005 Lower Sabine. Louisiana, Texas. 12020001 Upper Neches. Texas. 12020002 Middle Neches. Texas. 12020003 Lower Neches. Texas. 12020004 Upper Angelina. Texas. 12020005 Lower Angelina. Texas. 12020006 Village. Texas. 12020007 Pine Island Bayou. Texas. 12030101 Upper West Fork Trinity. Texas. 12030102 Lower West Fork Trinity. Texas. 12030103 Elm Fork Trinity. Texas. 12030104 Denton. Texas. 12030105 Upper Trinity. Texas. 12030106 East Fork Trinity. Texas. 12030107 Cedar. Texas. 12030108 Richland. Texas. 12030109 Chambers. Texas. 12030201 Lower Trinity-Tehuacana. Texas. 12030202 Lower Trinity-Kickapoo. Texas. 12030203 Lower Trinity. Texas. 12040101 West Fork San Jacinto. Texas. 12040102 Spring. Texas. 12040103 East Fork San Jacinto. Texas. 12040104 Buffalo-San Jacinto. Texas. 12040201 Sabine Lake. Louisiana, Texas. 12040202 East Galveston Bay. Texas. 12040203 North Galveston Bay. Texas. 12040204 West Galveston Bay. Texas. 12040205 Austin-Oyster. Texas. 12050001 Yellow House Draw. New Mexico, Texas. 12050002 Blackwater Draw. New Mexico, Texas. 12050003 North Fork Double Mountain Fork Brazos. Texas. 12050004 Double Mountain Fork Brazos. Texas. 12050005 Running Water Draw. New Mexico, Texas. 12050006 White. Texas. 12050007 Salt Fork Brazos. Texas. 12060101 Middle Brazos-Millers. Texas. 12060102 Upper Clear Fork Brazos. Texas. 12060103 Paint. Texas. 12060104 Lower Clear Fork Brazos. Texas. 12060105 Hubbard. Texas. 12060201 Middle Brazos-Palo Pinto. Texas. 12060202 Middle Brazos-Lake Whitney. Texas. 12060203 Bosque. Texas. 12060204 North Bosque. Texas. 12070101 Lower Brazos-Little Brazos. Texas. 12070102 Yegua. Texas. 12070103 Navasota. Texas. 12070104 Lower Brazos. Texas. 12070201 Leon. Texas. 12070202 Cowhouse. Texas. 12070203 Lampasas. Texas. 12070204 Little. Texas. 12070205 San Gabriel. Texas. 12080001 Lost Draw. New Mexico, Texas. 12080002 Colorado Headwaters. Texas. 12080003 Monument-Seminole Draws. New Mexico, Texas. 12080004 Mustang Draw. New Mexico, Texas. 12080005 Johnson Draw. Texas. 12080006 Sulphur Springs Draw. New Mexico, Texas. 12080007 Beals. Texas. 12080008 Upper Colorado. Texas. 12090101 Middle Colorado-Elm. Texas. 12090102 South Concho. Texas. 12090103 Middle Concho. Texas. 12090104 North Concho. Texas. 12090105 Concho. Texas. 12090106 Middle Colorado. Texas. 12090107 Pecan Bayou. Texas. 12090108 Jim Ned. Texas. 12090109 San Saba. Texas. 12090110 Brady. Texas. 12090201 Buchanan-Lyndon B. Johnson Lakes. Texas. 12090202 North Llano. Texas. 12090203 South Llano. Texas. 12090204 Llano. Texas. 12090205 Austin-Travis Lakes. Texas. 12090206 Pedernales. Texas. 12090301 Lower Colorado-Cummins. Texas. 12090302 Lower Colorado. Texas. 12090401 San Bernard. Texas. 12090402 East Matagorda Bay. Texas. 12100101 Lavaca. Texas. 12100102 Navidad. Texas. 12100201 Upper Guadalupe. Texas. 12100202 Middle Guadalupe. Texas. 12100203 San Marcos. Texas. 12100301 Upper San Antonio. Texas. 12100302 Medina. Texas. 12100303 Lower San Antonio. Texas. 12100304 Cibolo. Texas. 12100401 East Matagorda Bay. Texas. 12100402 West Matagorda Bay. Texas. 12100403 East San Antonio Bay. Texas. 12100404 West San Antonio Bay. Texas. 12100405 Aransas Bay. Texas. 12100406 Mission. Texas. 12100407 Aransas. Texas. 12110101 Nueces Headwaters. Texas. 12110102 West Nueces. Texas. 12110103 Upper Nueces. Texas. 12110104 Turkey. Texas. 12110105 Middle Nueces. Texas. 12110106 Upper Frio. Texas. 12110107 Hondo. Texas. 12110108 Lower Frio. Texas. 12110109 San Miguel. Texas. 12110110 Atascosa. Texas. 12110111 Lower Nueces. Texas. 12110201 North Corpus Christi Bay. Texas. 12110202 South Corpus Christi Bay. Texas. 12110203 North Laguna Madre. Texas. 12110204 San Fernando. Texas. 12110205 Baffin Bay. Texas. 12110206 Palo Blanco. Texas. 12110207 Central Laguna Madre. Texas. 12110208 South Laguna Madre. Texas.
13 Rio Grande Region 13010001 Rio Grande Headwaters. Colorado. 13010002 Alamosa-Trinchera. Colorado, New Mexico. 13010003 San Luis. Colorado. 13010004 Saguache. Colorado. 13010005 Conejos. Colorado, New Mexico. 13020101 Upper Rio Grande. Colorado, New Mexico. 13020102 Rio Chama. Colorado, New Mexico. 13020201 Rio Grande-Santa Fe. New Mexico. 13020202 Jemez. New Mexico. 13020203 Rio Grande-Albuquerque. New Mexico. 13020204 Rio Puerco. New Mexico. 13020205 Arroyo Chico. New Mexico. 13020206 North Plains. New Mexico. 13020207 Rio San Jose. New Mexico. 13020208 Plains of San Agustin. New Mexico. 13020209 Rio Saldo. New Mexico. 13020210 Jornada Del Muerto. New Mexico. 13020211 Elephant Butte Reservoir. New Mexico. 13030101 Caballo. New Mexico. 13030102 El Paso-Las Cruces. New Mexico, Texas. 13030103 Jornada Draw. New Mexico. 13030201 Playas Lake. New Mexico. 13030202 Mimbres. New Mexico. 13040100 Rio Grande-Fort Quitman. Texas. 13040201 Cibolo-Red Light. Texas. 13040202 Alamito. Texas. 13040203 Black Hills-Fresno. Texas. 13040204 Terlingua. Texas. 13040205 Big Bend. Texas. 13040206 Maravillas. Texas. 13040207 Santiago Draw. Texas. 13040208 Reagan-Sanderson. Texas. 13040209 San Francisco. Texas. 13040210 Lozier Canyon. Texas 13040211 Big Canyon. Texas. 13040212 Amistad Reservoir. Texas. 13040301 Upper Devils. Texas. 13040302 Lower Devils. Texas. 13040303 Dry Devils. Texas. 13050001 Western Estancia. New Mexico. 13050002 Eastern Estancia. New Mexico. 13050003 Tularosa Valley. New Mexico, Texas. 13050004 Salt Basin. New Mexico, Texas. 13060001 Pecos Headwaters. New Mexico. 13060002 Pintada Arroyo. New Mexico. 13060003 Upper Pecos. New Mexico. 13060004 Taiban. New Mexico. 13060005 Arroyo Del Macho. New Mexico. 13060006 Gallo Arroyo. New Mexico. 13060007 Upper Pecos-Long Arroyo. New Mexico. 13060008 Rio Hondo. New Mexico. 13060009 Rio Felix. New Mexico. 13060010 Rio Penasco. New Mexico. 13060011 Upper Pecos-Black. New Mexico, Texas. 13070001 Lower Pecos-Red Bluff Reservoir. New Mexico, Texas. 13070002 Delaware. New Mexico, Texas. 13070003 Toyah. Texas. 13070004 Salt Draw. Texas. 13070005 Barrilla Draw. Texas. 13070006 Coyanosa-Hackberry Draws. Texas. 13070007 Landreth-Monumnet Draws. New Mexico, Texas. 13070008 Lower Pecos. Texas. 13070009 Tunas. Texas. 13070010 Independence. Texas. 13070011 Howard Draw. Texas. 13080001 Elm-Sycamore. Texas. 13080002 San Ambrosia-Santa Isabel. Texas. 13080003 International Falcon Reservoir. Texas. 13090001 Los Olmos. Texas. 13090002 Lower Rio Grande. Texas.
14 Upper Colorado Region 14010001 Colorado Headwaters. Colorado. 14010002 Blue. Colorado. 14010003 Eagle. Colorado. 14010004 Roaring Fork. Colorado. 14010005 Colorado Headwaters-Plateau. Colorado, Utah. 14010006 Parachute-Roan. Colorado. 14020001 East-Taylor. Colorado. 14020002 Upper Gunnison. Colorado. 14020003 Tomichi. Colorado. 14020004 North Fork Gunnison. Colorado. 14020005 Lower Gunnison. Colorado. 14020006 Uncompahange. Colorado. 14030001 Westwater Canyon. Colorado, Utah. 14030002 Upper Dolores. Colorado, Utah. 14030003 San Miguel. Colorado. 14030004 Lower Dolores. Colorado, Utah. 14030005 Upper Colorado-Kane Springs. Colorado, Utah. 14040101 Upper Green. Wyoming. 14040102 New Fork. Wyoming. 14040103 Upper Green-Slate. Wyoming. 14040104 Big Sandy. Wyoming. 14040105 Bitter. Wyoming. 14040106 Upper Green-Flaming Gorge Reservoir. Colorado, Wyoming, Utah 14040107 Blacks Fork. Utah, Wyoming. 14040108 Muddy. Utah, Wyoming. 14040109 Vermilion. Colorado, Wyoming. 14040200 Great Divide Closed Basin. Wyoming. 14050001 Upper Yampa. Colorado. 14050002 Lower Yampa. Colorado. 14050003 Little Snake. Colorado, Wyoming. 14050004 Muddy. Wyoming. 14050005 Upper White. Colorado. 14050006 Piceance-Yellow. Colorado. 14050007 Lower White. Colorado, Utah. 14060001 Lower Green-Diamond. Colorado, Utah. 14060002 Ashley-Brush. Utah. 14060003 Duchesne. Utah 14060004 Strawberry. Utah. 14060005 Lower Green-Desolation Canyon. 14060006 Willow. Utah. 14060007 Price. Utah. 14060008 Lower Green. Utah. 14060009 San Rafael. Utah. 14070001 Upper Lake Powell. Utah. 14070002 Muddy. Utah. 14070003 Fremont. Utah. 14070004 Dirty Devil. Utah. 14070005 Escalante. Utah. 14070006 Lower Lake Powell. Arizona, Utah. 14070007 Paria. Arizona, Utah. 14080101 Upper San Juan. Colorado. New Mexico. 14080102 Piedra. Colorado. 14080103 Blanco Canyon. New Mexico. 14080104 Animas. Colorado, New Mexico. 14080105 Middle San Juan. Arizona, Colorado, New Mexico. 14080106 Chaco. Arizona, New Mexico. 14080107 Mancos. Colorado, New Mexico. 14080201 Lower San Juan-Four Corners. Arizona, Colorado. New Mexico, 14080202 Mcelmo. Colorado, Utah. 14080203 Montezuma. Colorado, Utah. 14080204 Chinle. Arizona, New Mexico, Utah. 14080205 Lower San Juan. Arizona. Utah.
15 Lower Colorado Region 15010001 Lower Colorado-Marble Canyon. Arizona. 15010002 Grand Canyon. Arizona. 15010003 Kanab. Arizona, Utah. 15010004 Havasu Canyon. Arizona. 15010005 Lake Mead. Arizona, Nevada. 15010006 Grand Wash. Arizona, Nevada. 15010007 Hualapai Wash. Arizona. 15010008 Upper Virgin. Utah. 15010009 Fort Pierce Wash. Arizona, Utah. 15010010 Lower Virgin. Arizona, Nevada, Utah. 15010011 White. Nevada. 15010012 Muddy. Nevada. 15010013 Meadow Valley Wash. Nevada, Utah. 15010014 Detrital Wash. Arizona. 15010015 Las Vegas Wash. Nevada. 15020001 Little Colorado Headwaters. Arizona, New Mexico. 15020002 Upper Little Colorado. Arizona, New Mexico. 15020003 Carrizo Wash. Arizona, New Mexico. 15020004 Zuni. Arizona, New Mexico. 15020005 Silver. Arizona. 15020006 Upper Peurco. Arizona, New Mexico. 15020007 Lower Peurco. Arizona. 15020008 Middle Little Colorado. Arizona. 15020009 Leroux Wash. Arizona. 15020010 Chevelon Canyon. Arizona. 15020011 Cottonwood Wash. Arizona. 15020012 Corn-Oraibi. Arizona. 15020013 Polacca Wash. Arizona. 15020014 Jadito Wash. Arizona. 15020015 Canyon Diablo. Arizona. 15020016 Lower Little Colorado. Arizona. 15020017 Dinnebito Wash. Arizona. 15020018 Moenkopi Wash. Arizona. 15030101 Havasu-Mohave Lakes. Arizona, California, Nevada. 15030102 Piute Wash. California, Nevada. 15030103 Sacramento Wash. Arizona. 15030104 Imperial Reservoir. Arizona, California. 15030105 Bouse Wash. Arizona. 15030106 Tyson Wash. Arizona. 15030107 Lower Colorado. Arizona, Colorado. 15030108 Yuma Desert. Arizona. 15030201 Big Sandy. Arizona. 15030202 Burro. Arizona. 15030203 Santa Maria. Arizona. 15030204 Bill Williams. Arizona. 15040001 Upper Gila. New Mexico. 15040002 Upper Gila-Mangas. Arizona, New Mexico. 15040003 Animas Valley. Arizona, New Mexico. 15040004 San Francisco. Arizona, New Mexico. 15040005 Upper Gila-San Carlos Reservoir. Arizona. 15040006 San Simon. Arizona, New Mexico. 15040007 San Carlos. Arizona. 15050100 Middle Gila. Arizona. 15050201 Willcox Playa. Arizona. 15050202 Upper San Pedro. Arizona. 15050203 Lower San Pedro. Arizona. 15050301 Upper Santa Cruz. Arizona. 15050302 Rillito. Arizona. 15050303 Lower Santa Cruz. Arizona. 15050304 Brawley Wash. Arizona. 15050305 Aguirre Valley. Arizona. 15050306 Santa Rosa Wash. Arizona. 15060101 Black. Arizona. 15060102 White. Arizona. 15060103 Upper Salt. Arizona. 15060104 Carrizo. Arizona. 15060105 Tonto. Arizona. 15060106 Lower Salt. Arizona. 15060201 Big Chino-Williamson Valley. Arizona. 15060202 Upper Verde. Arizona. 15060203 Lower Verde. Arizona. 15070101 Lower Gila-Painted Rock Reservoir. Arizona. 15070102 Aqua Fria. Arizona. 15070103 Hassayampa. Arizona. 15070104 Centennial Wash. Arizona. 15070201 Lower Gila. Arizona. 15070202 Tenmile Wash. Arizona. 15070203 San Cristobal Wash. Arizona. 15080101 San Simon Wash. Arizona. 15080102 Rio Sonoyta. Arizona. 15080103 Tule Desert. Arizona. 15080200 Rio De La Concepcion. Arizona. 15080301 Whitewater Draw. Arizona. 15080302 San Bernadino Valley. Arizona, New Mexico. 15080303 Cloverdale. New Mexico.
16 Great Basin Region 16010101 Upper Bear. Utah, Wyoming. 16010102 Central Bear. Idaho, Utah, Wyoming. 16010201 Bear Lake. Idaho, Utah. 16010202 Middle Bear. Idaho, Utah. 16010203 Little Bear-Logan. Idaho, Utah. 16010204 Lower Bear-Malad. Idaho, Utah. 16020101 Upper Weber. Utah, Wyoming. 16020102 Lower Weber. Utah. 16020201 Utah Lake. Utah. 16020202 Spanish Fork. Utah. 16020203 Provo. Utah. 16020204 Jordan. Utah. 16020301 Hamlin-Snake Valleys. Nevada, Utah. 16020302 Pine Valley. Utah. 16020303 Tule Valley. Utah. 16020304 Rush-Tooele Valleys. Utah. 16020305 Skull Valley. Utah. 16020306 Southern Great Salt Lake Desert. Nevada, Utah. 16020307 Pilot-Thousand Springs, Nevada, Utah. 16020308 Northern Great Salt Lake Desert. Nevada. Utah. 16020309 Curlew Valley. Idaho, Utah. 16020310 Great Salt Lake. Utah. 16030001 Upper Sevier. Utah. 16030002 East Fork Sevier. Utah. 16030003 Middle Sevier. Utah. 16030004 San Pitch. Utah. 16030005 Lower Sevier. Utah. 16030006 Escalante Desert. Nevada, Utah. 16030007 Beaver Bottoms-Upper Beaver. Utah. 16030008 Lower Beaver. Utah. 16030009 Sevier Lake. Utah. 16040101 Upper Humboldt. Nevada. 16040102 North Fork Humboldt. Nevada. 16040103 South Fork Humboldt. Nevada. 16040104 Pine. Nevada. 16040105 Middle Humboldt. Nevada. 16040106 Rock. Nevada. 16040107 Reese. Nevada. 16040108 Lower Humboldt. Nevada. 16040109 Little Humboldt. Nevada. 16040201 Upper Quinn. Nevada, Oregon. 16040202 Lower Quinn. Nevada. 16040203 Smoke Creek Desert. California, Nevada. 16040204 Massacre Lake. California, Nevada. 16040205 Thousand-Virgin. Nevada, Oregon. 16050101 Lake Tahoe. California, Nevada. 16050102 Truckee. California, Nevada. 16050103 Pyramid-Winnemucca Lakes. Nevada. 16050104 Granite Springs Valley. Nevada. 16050201 Upper Carson. California, Nevada. 16050202 Middle Carson. California, Nevada. 16050203 Carson Desert. Nevada. 16050301 East Walker. California, Nevada. 16050302 West Walker. California, Nevada. 16050303 Walker. Nevada. 16050304 Walker Lake. Nevada. 16060001 Dixie Valley. Nevada. 16060002 Gabbs Valley. Nevada. 16060003 Southern Big Smoky Valley. Nevada. 16060004 Northern Big Smoky Valley. Nevada. 16060005 Diamond-Monitor Valleys. Nevada. 16060006 Little Smoky-Newark Valleys. Nevada. 16060007 Long-Ruby Valleys. Nevada. 16060008 Spring-Steptoe Valleys. Nevada. 16060009 Dry Lake Valley. Nevada. 16060010 Fish Lake-Soda Spring Valleys. California, Nevada. 16060011 Ralston-Stone Cabin Valleys. Nevada. 16060012 Hot Creek-Railroad Valleys. Nevada. 16060013 Cactus-Sarcobatus Flats. Nevada. 16060014 Sand Spring-Tikaboo Valleys. Nevada. 16060015 Ivanpah-Pahrump Valleys. California, Nevada.
17 Pacific Northwest Region 17010101 Upper Kootenai. Idaho, Montana. 17010102 Fisher. Montana. 17010103 Yaak. Montana. 17010104 Lower Kootenai. Idaho, Montana. 17010105 Moyie. Idaho, Montana. 17010201 Upper Clark Fork. Montana. 17010202 Flint-Rock. Montana. 17010203 Blackfoot. Montana. 17010204 Middle Clark Fork. Montana. 17010205 Bitterroot. Montana. 17010206 North Fork Flathead. Montana. 17010207 Middle Fork Flathead. Montana. 17010208 Flathead Lake. Montana. 17010209 South Fork Flathead. Montana. 17010210 Stillwater. Montana. 17010211 Swan. Montana. 17010212 Lower Flathead. Montana. 17010213 Lower Clark Fork. Idaho, Montana. 17010214 Pend Oreille Lake. Idaho, Washington. 17010215 Priest. Idaho, Washington. 17010216 Pend Oreille. Idaho, Washington. 17010301 Upper Coeur D Alene. Idaho. 17010302 South Fork Coeur D Alene. Idaho. 17010303 Coeur D Alene Lake. Idaho, Washington. 17010304 St. Joe. Idaho. 17010305 Upper Spokane. Idaho, Washington. 17010306 Hangman. Idaho, Washington. 17010307 Lower Spokane. Washington. 17010308 Little Spokane. Idaho, Washington. 17020001 Franklin D. Roosevelt Lake. Washington. 17020002 Kettle. Washington. 17020003 Colville. Washington. 17020004 Sanpoil. Washington. 17020005 Chief Joseph. Washington. 17020006 Okanogan. Washington. 17020007 Similkameen. Washington. 17020008 Methow. Washington. 17020009 Lake Chelan. Washington. 17020010 Upper Columbia-Entiat. Washington. 17020011 Wenatchee. Washington. 17020012 Moses Coulee. Washington. 17020013 Upper Crab. Washington. 17020014 Banks Lake. Washington. 17020015 Lower Crab. Washington. 17020016 Upper Columbia-Priest Rapids. Washington. 17030001 Upper Yakima. Washington. 17030002 Naches. Washington. 17030003 Lower Yakima. Washington. 17040101 Snake Headwaters. Wyoming. 17040102 Gros Ventre. Wyoming. 17040103 Greys-Hobock. Wyoming. 17040104 Palisades. Idaho, Wyoming. 17040105 Salt. Idaho, Wyoming. 17040201 Idaho Falls. Idaho. 17040202 Upper Henrys. Idaho, Wyoming. 17040203 Lower Henrys. Idaho, Wyoming. 17040204 Teton. Idaho, Wyoming. 17040205 Willow. Idaho. 17040206 American Falls. Idaho. 17040207 Blackfoot. Idaho. 17040208 Portneuf. Idaho. 17040209 Lake Walcott. Idaho. 17040210 Raft. Idaho, Utah. 17040211 Goose. Idaho, Nevada, Utah. 17040212 Upper Snake-Rock. Idaho. 17040213 Salmon Falls. Idaho, Nevada. 17040214 Beaver-Camas. Idaho. 17040215 Medicine Lodge. Idaho. 17040216 Birch. Idaho. 17040217 Little Lost. Idaho. 17040218 Big Lost. Idaho. 17040219 Big Wood. Idaho. 17040220 Camas. Idaho. 17040221 Little Wood. Idaho. 17050101 C.J. Strike Reservoir. Idaho. 17050102 Bruneau. Idaho, Nevada. 17050103 Middle Snake-Succor. Idaho, Oregon. 17050104 Upper Owyhee. Idaho, Nevada. 17050105 South Fork Owyhee. Idaho, Nevada, Oregon. 17050106 East Little Owyhee. Idaho, Nevada, Oregon. 17050107 Middle Owyhee. Idaho, Nevada, Oregon. 17050108 Jordan. Idaho, Oregon. 17050109 Crooked-Rattlesnake. Oregon. 17050110 Lower Owyhee. Oregon. 17050111 North and Middle Forks Boise. Idaho. 17050112 Boise-Mores. Idaho. 17050113 South Fork Boise. Idaho. 17050114 Lower Boise. Idaho. 17050115 Middle Snake-Payette. Idaho, Oregon. 17050116 Upper Malheur. Oregon. 17050117 Lower Malheur. Oregon. 17050118 Bully. Oregon. 17050119 Wiilow. Oregon. 17050120 South Fork Payette. Idaho. 17050121 Middle Fork Payette. Idaho. 17050122 Payette. Idaho. 17050123 North Fork Payette. Idaho. 17050124 Weiser. Idaho. 17050201 Brownlee Reservoir. Idaho, Oregon. 17050202 Burnt. Oregon. 17050203 Powder. Oregon. 17060101 Hells Canyon. Idaho, Oregon. 17060102 Imnaha. Oregon. 17060103 Lower Snake-Asotin. Idaho, Oregon, Washington. 17060104 Upper Grande Ronde. Oregon. 17060105 Wallowa. Oregon. 17060106 Lower Grande Ronde. Oregon, Washington. 17060107 Lower Snake-Tucannon. Washington. 17060108 Palouse. Idaho, Washington. 17060109 Rock. Idaho, Washington. 17060110 Lower Snake. Washington. 17060201 Upper Salmon. Idaho. 17060202 Pashimeroi. Idaho. 17060203 Middle Salmon-Panther. Idaho. 17060204 Lemhi. Idaho. 17060205 Upper Middle Fork Salmon. Idaho. 17060207 Middle Salmon-Chamberlain. Idaho. 17060208 South Fork Salmon. Idaho. 17060209 Lower Salmon. Idaho. 17060210 Little Salmon. Idaho. 17060301 Upper Selway. Idaho. 17060302 Lower Selway. Idaho. 17060303 Lochsa. Idaho. 17060304 Middle Fork Clearwater. Idaho. 17060305 South Fork Clearwater. Idaho. 17060306 Clearwater. Idaho, Washington. 17060307 Upper North Fork Clearwater. Idaho. 17060308 Lower North Fork Clearwater. Idaho. 17070101 Middle Columbia-Lake Wallula. Oregon, Washington. 17070102 Walla Walla. Oregon, Washington. 17070103 Umatilla. Oregon. 17070104 Willow. Oregon. 17070105 Middle Columbia-Hood. Oregon, Washington. 17070106 Klickitat. Washington. 17070201 Upper John Day. Oregon. 17070202 North Fork John Day. Oregon. 17070203 Middle Fork John Day. Oregon. 17070204 Lower John Day. Oregon. 17070302 Little Deschutes. Oregon. 17070303 Beaver-South Fork. Oregon. 17070304 Upper Crooked. Oregon. 17070305 Lower Crooked. Oregon. 17070306 Lower Deschutes. Oregon. 17070307 Trout. Oregon. 17080001 Lower Columbia-Sandy. Oregon, Washington. 17080002 Lewis. Washington. 17080003 Lower Columbia-Clatskanie. Oregon, Washington. 17080004 Upper Cowlitz. Washington. 17080005 Lower Cowlitz. Washington. 17080006 Lower Columbia. Oregon, Washington. 17090001 Middle Fork Willamette. Oregon. 17090002 Coast Fork Willamette. Oregon. 17090003 Upper Willamette. Oregon. 17090004 Mckenzie. Oregon. 17090005 North Santiam. Oregon. 17090006 South Santiam. Oregon. 17090007 Middle Willamette. Oregon. 17090008 Yamhill. Oregon. 17090009 Molalla-Pudding. Oregon. 17090010 Tualatin. Oregon. 17090011 Clackamas. Oregon. 17090012 Lower Willamette. Oregon. 17100101 Hoh-Quillayute. Washington. 17100102 Queets-Quinault. Washington. 17100103 Upper Chehalis. Washington. 17100104 Lower Chehalis. Washington. 17100105 Grays Harbor. Washington. 17100106 Willpa Bay. Washington. 17100201 Necanicum. Oregon. 17100202 Nehalem. Oregon. 17100203 Wilson-Trusk-Nestuccu. Oregon. 17100204 Siletz-Yaquina. Oregon. 17100205 Alsea. Oregon. 17100206 Siuslaw. Oregon. 17100207 Siltcoos. Oregon. 17100301 North Umpqua. Oregon. 17100302 South Umpqua. Oregon. 17100303 Umpqua. Oregon. 17100304 Coos. Oregon. 17100305 Coquille. Oregon. 17100306 Sixes. Oregon. 17100307 Upper Rouge. Oregon. 17100308 Middle Rouge. Oregon. 17100309 Applegate. California, Oregon. 17100310 Lower Rouge. Oregon. 17100311 Illinois. California, Oregon. 17100312 Chetco. California, Oregon. 17110001 Fraser. Washington. 17110002 Straight of Georgia. Washington. 17110003 San Juan Islands. Washington. 17110004 Nooksack. Washington. 17110005 Upper Skagit. Washington. 17110006 Sauk. Washington. 17110007 Lower Skagit. Washington. 17110008 Stillaguamish. Washington. 17110009 Skykomish. Washington. 17110010 Snoqualmie. Washington. 17110011 Snohomish. Washington. 17110012 Lake Washington. Washington. 17110013 Duwamish. Washington. 17110014 Puyallup. Washington. 17110015 Nisqually. Washington. 17110016 Deschutes. Washington. 17110017 Skokomish. Washington. 17110018 Hood Canal. Washington. 17110019 Puget Sound. Washington. 17110020 Dungeness-Elwha. Washington. 17110021 Crescent-Hoko. Washington. 17120001 Harney-Malheur Lakes. Oregon. 17120002 Silvies. Oregon. 17120003 Donner and Blitzen. Oregon. 17120004 Silver. Oregon. 17120005 Summer Lake. Oregon. 17120006 Lake Abert. Oregon. 17120007 Warner Lakes. California, Nevada, Oregon. 17120008 Guano. Nevada, Oregon. 17120009 Alvord Lake. Nevada, Oregon.
18 California Region 18010101 Smith. California, Oregon. 18010102 Mad-Redwood. California. 18010103 Upper Eel. California. 18010104 Middle Fork Eel. California. 18010105 Lower Eel. California. 18010106 South Fork Eel. California. 18010107 Mattole. California. 18010108 Big-Navarro-Garcia. California. 18010109 Gualala-Salmon. California. 18010110 Russian. California. 18010111 Bodega Bay. California. 18010201 Willamson. Oregon. 18010202 Sprague. Oregon. 18010203 Upper Klamath Lake. Oregon. 18010204 Lost. Cailfornia, Oregon. 18010205 Butte. California, Oregon. 18010206 Upper Klamath. California, Oregon. 18010207 Shasta. California. 18010208 Scott. California. 18010209 Lower Klamath. California, Oregon. 18010210 Salmon. California. 18010211 Trinity. California. 18010212 South Fork Trinity. California. 18020001 Goose Lake. California, Oregon. 18020002 Upper Pit. California. 18020003 Lower Pit. California. 18020004 McCloud. California. 18020005 Sacramento Headwaters. California. 18020101 Sacramento-Lower Cow-Lower Clear. California. 18020102 Lower Cottonwood. California. 18020103 Sacramento-Lower Thomes. California. 18020104 Sacramento-Stone Corral. California. 18020105 Lower Butte. California. 18020106 Lower Feather. California. 18020107 Lower Yuba. California. 18020108 Lower Bear. California. 18020109 Lower Sacramento. California. 18020110 Lower Cache. California. 18020111 Lower American. California. 18020112 Sacramento-Upper Clear. California. 18020113 Cottonwood Headwaters. California. 18020114 Upper Elder-Upper Thomes. California. 18020115 Upper Stony. California. 18020116 Upper Cache. California. 18020117 Upper Putah. California. 18020118 Upper Cow-Battle. California. 18020119 Mill-Big Chico. California. 18020120 Upper Butte. California. 18020121 North Fork Feather. California. 18020122 East Branch North Fork Feather. California. 18020123 Middle Fork Feather. California. 18020124 Honcut Headwaters. California. 18020125 Upper Yuba. California. 18020126 Upper Bear. California. 18020127 Upper Coon-Upper Auburn. California. 18020128 North Fork American. California. 18020129 South Fork American. California. 18030001 Upper Kern. California. 18030002 South Fork Kern. California. 18030003 Middle Kern-Upper Tehachapi-Grapevine. California. 18030004 Upper Poso. California. 18030005 Upper Deer-Upper White. California. 18030006 Upper Tule. California. 18030007 Upper Kaweah. California. 18030008 Mill. California. 18030009 Upper Dry. California. 18030010 Upper King. California. 18030011 Upper Los Gatos-Avenal. California. 18030012 Tulare-Buena Vista Lakes. California. 18040001 Middle San Joaquin-Lower Chowchilla. California. 18040002 Middle San Joaquin-Lower Merced- Lower Stanislaus. Californi 18040003 San Joaquin Delta. California. 18040004 Lower Calaveras-Mormon Slough. California. 18040005 Lower Consumnes-Lower Mokelumne. California. 18040006 Upper San Joaquin. California. 18040007 Upper Chowchilla-Upper Fresno. California. 18040008 Upper Merced. California. 18040009 Upper Tuolumne. California. 18040010 Upper Stanislaus. California. 18040011 Upper Calaveras California. 18040012 Upper Mokelumne. California. 18040013 Upper Consumnes. California. 18040014 Panoche-San Luis Reservoir. California. 18050001 Suisun Bay. California. 18050002 San Pablo Bay. California. 18050003 Coyote. California. 18050004 San Francisco Bay. California. 18050005 Tomales-Drake Bays. California. 18050006 San Francisco Coastal South. California. 18060001 San Lorenzo-Soquel. California. 18060002 Pajaro. California. 18060003 Carrizo Plain. California. 18060004 Estrella. California. 18060005 Salinas. California. 18060006 Central Coastal. California. 18060007 Cuyama. California. 18060008 Santa Maria. California. 18060009 San Antonio. California. 18060010 Santa Ynez. California. 18060011 Alisal-Elkhorn Sloughs. California. 18060012 Carmel. California. 18060013 Santa Barbara Coastal. California. 18060014 Santa Barbara Channel Islands. California. 18070101 Ventura. California. 18070102 Santa Clara. California. 18070103 Calleguas. California. 18070104 Santa Monica Bay. California. 18070105 Los Angeles. California. 18070106 San Gabriel. California. 18070107 San Pedro Channel Islands. California. 18070201 Seal Beach. California. 18070202 San Jacinto. California. 18070203 Santa Ana. California. 18070204 Newport Bay. California. 18070301 Aliso-San Onofre. California. 18070302 Santa Margarita. California. 18070303 San Luis Rey-Escondido. California. 18070304 San Diego. California. 18070305 Cottonwood-Tijuana. California. 18080001 Suprise Valley. California, Nevada. 18080002 Madeline Plains. California, Nevada. 18080003 Honey-Eagle Lakes. California, Nevada. 18090101 Mono Lake. California, Nevada. 18090102 Crowley Lake. California, Nevada. 18090103 Owens Lake. California. 18090201 Eureka-Saline Valleys. California, Nevada. 18090202 Upper Amargosa. California, Nevada. 18090203 Death Valley-Lower Amargosa. California, Nevada. 18090204 Panamint Valley. California. 18090205 Indian Wells-Searles Valleys. California. 18090206 Antelope-Fremont Valleys. California. 18090207 Coyote-Cuddeback Lakes. California. 18090208 Mojave. California. 18100100 Southern Mojave. California. 18100200 Salton Sea. California.
19 Alaska Region 19010101 Southeast Mainland. Alaska. 19010102 Ketchikan. Alaska. 19010103 Prince of Wales. Alaska. 19010201 Mainland. Alaska. 19010202 Kuiu-Kupreanof-Mitkof-Etolin-Zarembo-Wrangell Islands. Alask 19010203 Baranof-Chichagof Islands. Alaska. 19010204 Admiralty Island. Alaska. 19010301 Lynn Canal. Alaska. 19010302 Glacier Bay. Alaska. 19010303 Chilkat-Skagway Rivers. Alaska. 19010401 Yakutat Bay. Alaska. 19010402 Bering Glacier. Alaska. 19020101 Upper Copper River. Alaska 19020102 Middle Copper River. Alaska 19020103 Chitina River. Alaska 19020104 Lower Copper River. Alaska 19020201 Eastern Prince William Sound. Alaska. 19020202 Western Prince William Sound. Alaska. 19020301 Lower Kenai Peninsula. Alaska. 19020302 Upper Kenai Peninsula. Alaska. 19020401 Anchorage. Alaska. 19020402 Matansuka. Alaska. 19020501 Upper Susitna River. Alaska. 19020502 Chulitna River. Alaska. 19020503 Talkeetna River. Alaska. 19020504 Yentna River. Alaska. 19020505 Lower Susitna River. Alaska. 19020601 Redoubt-Trading Bays. Alaska. 19020602 Tuxdeni-Kamishak Bays. Alaska. 19020701 Kodiak-Afognak Islands. Alaska. 19020702 Shelikof Straight. Alaska. 19030101 Cold Bay. Alaska. 19030102 Fox Islands. Alaska. 19030103 Western Aleutian. Alaska. 19030104 Pribilof Islands. Alaska. 19030201 Port Heiden. Alaska. 19030202 Ugashik Bay. Alaska. 19030203 Egegik Bay. Alaska. 19030204 Naknek. Alaska. 19030205 Lake Clark. Alaska. 19030206 Lake Iliamna. Alaska. 19030301 Upper Nushagak River. Alaska. 19030302 Mulchatna River. Alaska. 19030303 Lower Nushagak River. Alaska. 19030304 Wood River. Alaska. 19030305 Togiak. Alaska. 19030401 North Fork Kuskokwim River. Alaska. 19030402 Farewll Lake. Alaska. 19030403 Takotna River. Alaska. 19030404 Holitna River. Alaska. 19030405 Stony River. Alaska. 19030501 Aniak. Alaska 19030502 Kuskokwim Delta. Alaska. 19030503 Nunavak-St. Matthew Islands. Alaska. 19040101 White River. Alaska. 19040102 Ladue River. Alaska. 19040103 Sixtymile River. Alaska. 19040104 Fortymile River. Alaska. 19040201 Old Crow River. Alaska. 19040202 Coleen River. Alaska. 19040203 Sheenjek River. Alaska. 19040204 Black River. Alaska. 19040205 Porcupine Flats. Alaska. 19040301 Middle Fork-North Fork Chandalar Rivers. Alaska. 19040302 East Fork Chandalar River. Alaska. 19040303 Christian River. Alaska. 19040304 Lower Chandalar River. Alaska. 19040401 Eagle To Circle. Alaska. 19040402 Birch-Beaver Creeks. Alaska. 19040403 Yukon Flats. Alaska. 19040404 Ramparts. Alaska. 19040501 Nebesna-Chisana Rivers. Alaska. 19040502 Tok. Alaska. 19040503 Healy Lake. Alaska. 19040504 Delta River. Alaska. 19040505 Salcha River. Alaska. 19040506 Chena River. Alaska. 19040507 Tanana River. Alaska. 19040508 Nenana River. Alaska. 19040509 Tolovana River. Alaska. 19040510 Kantishna River. Alaska. 19040511 Lower Tanana River. Alaska. 19040601 Upper Koyukuk River. Alaska. 19040602 South Fork Koyukuk River. Alaska. 19040603 Alatna River. Alaska. 19040604 Kanuti River. Alaska. 19040605 Allakaket River. Alaska. 19040606 Huslia River. Alaska. 19040607 Dulbi River. Alaska. 19040608 Koyukuk Flats. Alaska. 19040609 Kateel River. Alaska. 19040701 Tozitna River. Alaska. 19040702 Nowitna River. Alaska. 19040703 Melozitna River. Alaska. 19040704 Ramparts to Ruby. Alaska. 19040705 Galena. Alaska. 19040801 Anvik River. Alaska. 19040802 Upper Innoko River. Alaska. 19040803 Lower Innoko River. Alaska. 19040804 Anvik to Pilot Station. Alaska. 19040805 Yukon Delta. Alaska. 19050101 St. Lawrence Island. Alaska. 19050102 Unalakleet. Alaska. 19050103 Norton Bay. Alaska. 19050104 Nome. Alaska. 19050105 Imuruk Basin. Alaska. 19050201 Shishmaref. Alaska. 19050202 Goodhope-Spafarief Bay. Alaska. 19050203 Buckland River. Alaska. 19050301 Selawik Lake. Alaska. 19050302 Upper Kobuk River. Alaska. 19050303 Middle Kobuk River. Alaska. 19050304 Lower Kobuk River. Alaska. 19050401 Upper Noatak River. Alaska. 19050402 Middle Noatak River. Alaska. 19050403 Lower Noatak River. Alaska. 19050404 Wulik-Kivalina Rivers. Alaska. 19050405 Lisburne Peninsula. Alaska. 19060101 Kukpowruk River. Alaska. 19060102 Kokolik River. Alaska. 19060103 Utukok River. Alaska. 19060201 Kuk River. Alaska. 19060202 Northwest Coast. Alaska. 19060203 Meade River. Alaska. 19060204 Ikpikpuk River. Alaska. 19060205 Harrison Bay. Alaska. 19060301 Upper Colville River. Alaska. 19060302 Killik River. Alaska. 19060303 Chandler-Anaktuvuk Rivers. Alaska. 19060304 Lower Colville River. Alaska. 19060401 Kuparuk River. Alaska. 19060402 Sagavanirktok River. Alaska. 19060403 Mikkelson Bay. Alaska. 19060501 Canning River. Alaska. 19060502 Camden Bay. Alaska. 19060503 Beaufort Lagoon. Alaska.
20 Hawaii Region 20010000 Hawaii. Hawaii. 20020000 Maui. Hawaii. 20030000 Kahoolawe. Hawaii. 20040000 Lanai. Hawaii. 20050000 Molokai. Hawaii. 20060000 Oahu. Hawaii. 20070000 Kauai. Hawaii. 20080000 Niihau. Hawaii. 20090000 Northwestern Hawaiian Islands. Hawaii.
21 Caribbean Region 21010001 Interior Puerto Rico. Puerto Rico 21010002 Cibuco-Guajataca. Puerto Rico 21010003 Culebrinas-Guanajibo. Puerto Rico. 21010004 Southern Puerto Rico. Puerto Rico 21010005 Eastern Puerto Rico. Puerto Rico 21010006 Puerto Rican Islands. Puerto Rico 21020001 St. John-St. Thomas. U.S. Virgin Islands. 21020002 St. Croix. U.S. Virgin Islands.