The HUC6 Codes
6-digit Hydrological Unit Codes represent the aggregation of watersheds known as hydrologic accounting units.


Sequential List


010100='ST. JOHN'
010200='PENOBSCOT'
010300='KENNEBEC'
010400='ANDROSCOGGIN'
010500='MAINE COASTAL'
010600='SACO'
010700='MERRIMACK'
010801='UPPER CONNECTICUT'
010802='LOWER CONNECTICUT'
010900='MASSACHUSETTS-RHODE ISLAND COASTAL'
011000='CONNECTICUT COASTAL'
011100='ST. FRANCOIS'
020100='RICHELIEU'
020200='UPPER HUDSON'
020301='LOWER HUDSON'
020302='LONG ISLAND'
020401='UPPER DELAWARE'
020402='LOWER DELAWARE'
020403='NEW JERSEY COASTAL'
020501='UPPER SUSQUEHANNA'
020502='WEST BRANCH SUSQUEHANNA'
020503='LOWER SUSQUEHANNA'
020600='UPPER CHESAPEAKE'
020700='POTOMAC'
020801='LOWER CHESAPEAKE'
020802='JAMES'
030101='ROANOKE'
030102='ALBEMARLE-CHOWAN'
030201='PAMLICO'
030202='NEUSE'
030300='CAPE FEAR'
030401='UPPER PEE DEE'
030402='LOWER PEE DEE'
030501='SANTEE'
030502='EDISTO-SOUTH CAROLINA COASTAL'
030601='SAVANNAH'
030602='OGEECHEE'
030701='ALTAMAHA'
030702='ST. MARYS-SATILLA'
030801='ST. JOHNS'
030802='EAST FLORIDA COASTAL'
030901='KISSIMMEE'
030902='SOUTHERN FLORIDA'
031001='PEACE'
031002='TAMPA BAY'
031101='AUCILLA-WACCASASSA'
031102='SUWANNEE'
031200='OCHLOCKONEE'
031300='APALACHICOLA'
031401='FLORIDA PANHANDLE COASTAL'
031402='CHOCTAWHATCHEE'
031403='ESCAMBIA'
031501='COOSA-TALLAPOOSA'
031502='ALABAMA'
031601='BLACK WARRIOR-TOMBIGBEE'
031602='MOBILE BAY-TOMBIGBEE'
031700='PASCAGOULA'
031800='PEARL'
040101='NORTHWESTERN LAKE SUPERIOR'
040102='ST. LOUIS'
040103='SOUTHWESTERN LAKE SUPERIOR'
040201='SOUTHCENTRAL LAKE SUPERIOR'
040202='SOUTHEASTERN LAKE SUPERIOR'
040203='LAKE SUPERIOR'
040301='NORTHWESTERN LAKE MICHIGAN'
040302='FOX'
040400='SOUTHWESTERN LAKE MICHIGAN'
040500='SOUTHEASTERN LAKE MICHIGAN'
040601='NORTHEASTERN LAKE MICHIGAN'
040602='LAKE MICHIGAN'
040700='NORTHWESTERN LAKE HURON'
040801='SOUTHWESTERN LAKE HURON'
040802='SAGINAW'
040803='LAKE HURON'
040900='ST. CLAIR-DETROIT'
041000='WESTERN LAKE ERIE'
041100='SOUTHERN LAKE ERIE'
041201='EASTERN LAKE ERIE'
041202='LAKE ERIE'
041300='SOUTHWESTERN LAKE ONTARIO'
041401='SOUTHEASTERN LAKE ONTARIO'
041402='OSWEGO'
041501='NORTHEASTERN LAKE ONTARIO'
041502='LAKE ONTARIO'
041503='ST. LAWRENCE'
050100='ALLEGHENY'
050200='MONONGAHELA'
050301='UPPER OHIO-BEAVER'
050302='UPPER OHIO-LITTLE KANAWHA'
050400='MUSKINGUM'
050500='KANAWHA'
050600='SCIOTO'
050701='GUYANDOTTE'
050702='BIG SANDY'
050800='GREAT MIAMI'
050901='MIDDLE OHIO-RACCOON'
050902='MIDDLE OHIO-LITTLE MIAMI'
051001='LICKING'
051002='KENTUCKY'
051100='GREEN'
051201='WABASH'
051202='PATOKA-WHITE'
051301='UPPER CUMBERLAND'
051302='LOWER CUMBERLAND'
051401='LOWER OHIO-SALT'
051402='LOWER OHIO'
060101='FRENCH BROAD-HOLSTON'
060102='UPPER TENNESSEE'
060200='MIDDLE TENNESSEE-HIWASSEE'
060300='MIDDLE TENNESSEE-ELK'
060400='LOWER TENNESSEE'
070101='MISSISSIPPI HEADWATERS'
070102='UPPER MISSISSIPPI-CROW-RUM'
070200='MINNESOTA'
070300='ST. CROIX'
070400='UPPER MISSISSIPPI-BLACK-ROOT'
070500='CHIPPEWA'
070600='UPPER MISSISSIPPI-MAQUOKETA-PLUM'
070700='WISCONSIN'
070801='UPPER MISSISSIPPI-SKUNK-WAPSIPINICON'
070802='IOWA'
070900='ROCK'
071000='DES MOINES'
071100='UPPER MISSISSIPPI-SALT'
071200='UPPER ILLINOIS'
071300='LOWER ILLINOIS'
071401='UPPER MISSISSIPPI-MERAMEC'
071402='KASKASKIA'
080101='LOWER MISSISSIPPI-MEMPHIS'
080102='HATCHIE-OBION'
080201='LOWER MISSISSIPPI-HELENA'
080202='ST. FRANCIS'
080203='LOWER WHITE'
080204='LOWER ARKANSAS'
080301='LOWER MISSISSIPPI-GREENVILLE'
080302='YAZOO'
080401='UPPER OUACHITA'
080402='LOWER OUACHITA'
080403='LOWER RED'
080500='BOEUF-TENSAS'
080601='LOWER MISSISSIPPI-NATCHEZ'
080602='BIG BLACK-HOMOCHITTO'
080701='LOWER MISSISSIPPI-BATON ROUGE'
080702='LAKE MAUREPAS'
080703='LOWER GRAND'
080801='ATCHAFALAYA-VERMILION'
080802='CALCASIEU-MERMENTAU'
080901='LOWER MISSISSIPPI-NEW ORLEANS'
080902='LAKE PONTCHARTRAIN'
080903='CENTRAL LOUISIANA COASTAL'
090100='SOURIS'
090201='UPPER RED'
090202='DEVILS LAKE-SHEYENNE'
090203='LOWER RED'
090300='RAINY'
100100='SASKATCHEWAN'
100200='MISSOURI HEADWATERS'
100301='UPPER MISSOURI'
100302='MARIAS'
100401='FORT PECK LAKE'
100402='MUSSELSHELL'
100500='MILK'
100600='MISSOURI-POPLAR'
100700='UPPER YELLOWSTONE'
100800='BIG HORN'
100901='TONGUE'
100902='POWDER'
101000='LOWER YELLOWSTONE'
101101='LAKE SAKAKAWEA'
101102='LITTLE MISSOURI'
101201='CHEYENNE'
101202='BELLE FOURCHE'
101301='LAKE OAHE'
101302='CANNONBALL-HEART-KNIFE'
101303='GRAND-MOREAU'
101401='FORT RANDALL RESERVOIR'
101402='WHITE'
101500='NIOBRARA'
101600='JAMES'
101701='LEWIS AND CLARK LAKE'
101702='BIG SIOUX'
101800='NORTH PLATTE'
101900='SOUTH PLATTE'
102001='MIDDLE PLATTE'
102002='LOWER PLATTE'
102100='LOUP'
102200='ELKHORN'
102300='MISSOURI-LITTLE SIOUX'
102400='MISSOURI-NISHNABOTNA'
102500='REPUBLICAN'
102600='SMOKY HILL'
102701='KANSAS'
102702='BIG BLUE'
102801='GRAND'
102802='CHARITON'
102901='OSAGE'
102902='GASCONADE'
103001='LOWER MISSOURI-BLACKWATER'
103002='LOWER MISSOURI'
110100='UPPER WHITE'
110200='UPPER ARKANSAS'
110300='MIDDLE ARKANSAS'
110400='UPPER CIMARRON'
110500='LOWER CIMARRON'
110600='ARKANSAS-KEYSTONE'
110701='VERDIGRIS'
110702='NEOSHO'
110800='UPPER CANADIAN'
110901='MIDDLE CANADIAN'
110902='LOWER CANADIAN'
111001='UPPER BEAVER'
111002='LOWER BEAVER'
111003='LOWER NORTH CANADIAN'
111101='ROBERT S. KERR RESERVOIR'
111102='LOWER ARKANSAS-FOURCHE LA FAVE'
111201='PRAIRIE DOG TOWN FORK RED'
111202='SALT FORK RED'
111203='NORTH FORK RED'
111301='RED-PEASE'
111302='RED-LAKE TEXOMA'
111303='WASHITA'
111401='RED-LITTLE'
111402='RED-SALINE'
111403='BIG CYPRESS-SULPHUR'
120100='SABINE'
120200='NECHES'
120301='UPPER TRINITY'
120302='LOWER TRINITY'
120401='SAN JACINTO'
120402='GALVESTON BAY-SABINE LAKE'
120500='BRAZOS HEADWATERS'
120601='MIDDLE BRAZOS-CLEAR FORK'
120602='MIDDLE BRAZOS-BOSQUE'
120701='LOWER BRAZOS'
120702='LITTLE'
120800='UPPER COLORADO'
120901='MIDDLE COLORADO-CONCHO'
120902='MIDDLE COLORADO-LLANO'
120903='LOWER COLORADO'
120904='SAN BERNARD COASTAL'
121001='LAVACA'
121002='GUADALUPE'
121003='SAN ANTONIO'
121004='CENTRAL TEXAS COASTAL'
121101='NUECES'
121102='SOUTHWESTERN TEXAS COASTAL'
130100='RIO GRANDE HEADWATERS'
130201='UPPER RIO GRANDE'
130202='RIO GRANDE-ELEPHANT BUTTE'
130301='RIO GRANDE-CABALLO'
130302='MIMBRES'
130401='RIO GRANDE-FORT QUITMAN'
130402='RIO GRANDE-AMISTAD'
130403='DEVILS'
130500='RIO GRANDE CLOSED BASINS'
130600='UPPER PECOS'
130700='LOWER PECOS'
130800='RIO GRANDE-FALCON'
130900='LOWER RIO GRANDE'
140100='COLORADO HEADWATERS'
140200='GUNNISON'
140300='UPPER COLORADO-DOLORES'
140401='UPPER GREEN'
140402='GREAT DIVIDE CLOSED BASIN'
140500='WHITE-YAMPA'
140600='LOWER GREEN'
140700='UPPER COLORADO-DIRTY DEVIL'
140801='UPPER SAN JUAN'
140802='LOWER SAN JUAN'
150100='LOWER COLORADO-LAKE MEAD'
150200='LITTLE COLORADO'
150301='LOWER COLORADO'
150302='BILL WILLIAMS'
150400='UPPER GILA'
150501='MIDDLE GILA'
150502='SAN PEDRO-WILLCOX'
150503='SANTA CRUZ'
150601='SALT'
150602='VERDE'
150701='LOWER GILA-AGUA FRIA'
150702='LOWER GILA'
150801='RIO SONOYTA'
150802='RIO DE LA CONCEPCION'
150803='RIO DE BAVISPE'
160101='UPPER BEAR'
160102='LOWER BEAR'
160201='WEBER'
160202='JORDAN'
160203='GREAT SALT LAKE'
160300='ESCALANTE DESERT-SEVIER LAKE'
160401='HUMBOLDT'
160402='BLACK ROCK DESERT'
160501='TRUCKEE'
160502='CARSON'
160503='WALKER'
160600='CENTRAL NEVADA DESERT BASINS'
170101='KOOTENAI'
170102='PEND OREILLE'
170103='SPOKANE'
170200='UPPER COLUMBIA'
170300='YAKIMA'
170401='SNAKE HEADWATERS'
170402='UPPER SNAKE'
170501='MIDDLE SNAKE-BOISE'
170502='MIDDLE SNAKE-POWDER'
170601='LOWER SNAKE'
170602='SALMON'
170603='CLEARWATER'
170701='MIDDLE COLUMBIA'
170702='JOHN DAY'
170703='DESCHUTES'
170800='LOWER COLUMBIA'
170900='WILLAMETTE'
171001='WASHINGTON COASTAL'
171002='NORTHERN OREGON COASTAL'
171003='SOUTHERN OREGON COASTAL'
171100='PUGET SOUND'
171200='OREGON CLOSED BASINS'
180101='NORTHERN CALIFORNIA COASTAL'
180102='KLAMATH'
180200='UPPER SACRAMENTO'
180201='LOWER SACRAMENTO'
180300='TULARE-BUENA VISTA LAKES'
180400='SAN JOAQUIN'
180500='SAN FRANCISCO BAY'
180600='CENTRAL CALIFORNIA COASTAL'
180701='VENTURA-SAN GABRIEL COASTAL'
180702='SANTA ANA'
180703='LAGUNA-SAN DIEGO COASTAL'
180800='NORTH LAHONTAN'
180901='MONO-OWENS LAKES'
180902='NORTHERN MOJAVE'
181001='SOUTHERN MOJAVE'
181002='SALTON SEA'
190100='ARCTIC SLOPE'
190200='NORTHWEST ALASKA'
190300='YUKON'
190400='SOUTHWEST ALASKA'
190500='SOUTH CENTRAL ALASKA'
190600='SOUTHEAST ALASKA'
200100='HAWAII'
200200='MAUI'
200300='KAHOOLAWE'
200400='LANAI'
200500='MOLOKAI'
200600='OAHU'
200700='KAUAI'
200800='NIIHAU'
200900='NORTHWESTERN HAWAIIAN ISLANDS'
210100='PUERTO RICO'
210200='VIRGIN ISLANDS'
210300='CARIBBEAN OUTLYING AREAS'


Last Update: 02-04-97