HydrionisGlobal Water Intelligence
Monitoring network

United States monitoring network

Hydrionis holds continuous records from 4,630 monitoring locations in United States, the earliest opening in 1806.

4,630 locations1806–2026
4,630
Monitoring locations
6,523,277
Observations held
1806–2026
Record span
4
Kinds of measurement

Where the network is

United States monitoring network
2,314 river gauges · 1,878 sampling and rain gauges · 250 observation boreholes · 188 monitored reservoirs
United States monitoring network400 locations, each labelled individually.Abington — Sampling and rain gauge, 1994–2026Beaufort — Sampling and rain gauge, 1994–2026Cherokee Nation — Sampling and rain gauge, 2002–2026Death Valley NM — Sampling and rain gauge, 1995–2007Gothic — Sampling and rain gauge, 1989–2026Lye Brook — Sampling and rain gauge, 1994–2007Parsons — Sampling and rain gauge, 1988–2026Salamonie Reservoir — Sampling and rain gauge, 1988–2026Blue Grass Trail — Sampling and rain gauge, 1987–2026Pinnacles NM — Sampling and rain gauge, 1995–2026Whiteface Mountain — Sampling and rain gauge, 1987–2026West Point A — Sampling and rain gauge, 1987–1988Reynolds Creek — Sampling and rain gauge, 1989–1993Carlisle WTP — Sampling and rain gauge, 1840–2026Ft Bidwell — Sampling and rain gauge, 1867–2026Dahlonega 4wsw — Sampling and rain gauge, 1874–2026Jamestown State Hosp — Sampling and rain gauge, 1881–2026Lowell — Sampling and rain gauge, 1885–2026Talladega — Sampling and rain gauge, 1888–2026Edinburg — Sampling and rain gauge, 1889–2026Adin Mtn — Sampling and rain gauge, 1984–2026Apishapa — Sampling and rain gauge, 1980–2026Banfield Mountain — Sampling and rain gauge, 1968–2026Bear Canyon — Sampling and rain gauge, 1980–2026Beartooth Lake — Sampling and rain gauge, 1980–2026Beaver Spring — Sampling and rain gauge, 2009–2026Big Flat — Sampling and rain gauge, 1978–2026Bisson Creek — Sampling and rain gauge, 1991–2026Blazed Alder — Sampling and rain gauge, 1981–2026Bone Springs Div — Sampling and rain gauge, 1978–2026Brighton — Sampling and rain gauge, 1986–2026Buckboard Flat — Sampling and rain gauge, 2012–2026Burnt Mountain — Sampling and rain gauge, 1999–2026Camp Jackson — Sampling and rain gauge, 1985–2026Cave Mountain — Sampling and rain gauge, 2011–2026Chena Lakes — Sampling and rain gauge, 2020–2026Cloud Peak Reservoir — Sampling and rain gauge, 1978–2026Columbine Pass — Sampling and rain gauge, 1986–2026Corral — Sampling and rain gauge, 2013–2026Crater Meadows — Sampling and rain gauge, 1984–2026Currant Creek — Sampling and rain gauge, 1978–2026Decline Creek — Sampling and rain gauge, 2019–2026Dollarhide Summit — Sampling and rain gauge, 1981–2026Dungeness — Sampling and rain gauge, 1998–2026Eilertson Meadows — Sampling and rain gauge, 1980–2026Emery Creek — Sampling and rain gauge, 1976–2026Fielding Lake — Sampling and rain gauge, 2014–2026Fool Creek — Sampling and rain gauge, 2011–2026Fry — Sampling and rain gauge, 1980–2026Garita Peak — Sampling and rain gauge, 2016–2026Gold Basin — Sampling and rain gauge, 2021–2026Granite Crk — Sampling and rain gauge, 1988–2026Grizzly Peak — Sampling and rain gauge, 1980–2026Hanson Sawmill — Sampling and rain gauge, 1980–2026Heavenly Valley — Sampling and rain gauge, 1978–2026Hobble Creek — Sampling and rain gauge, 2012–2026Horse Meadow — Sampling and rain gauge, 2003–2026Independence Camp — Sampling and rain gauge, 1978–2026Island Park — Sampling and rain gauge, 1981–2026Jump Off Joe — Sampling and rain gauge, 1978–2026Kiln — Sampling and rain gauge, 1980–2026Lake Irene — Sampling and rain gauge, 1979–2026Lasal Mountain — Sampling and rain gauge, 1981–2026Lightning Ridge — Sampling and rain gauge, 2004–2026Little Valley — Sampling and rain gauge, 2013–2026Long Flat — Sampling and rain gauge, 1980–2026Lost Dog — Sampling and rain gauge, 1998–2026Lynn Lake — Sampling and rain gauge, 2007–2026Marlette Lake — Sampling and rain gauge, 1978–2026Mcneil Canyon — Sampling and rain gauge, 1986–2026Michigan Creek — Sampling and rain gauge, 1998–2026Mining Fork — Sampling and rain gauge, 1988–2026Moose Creek — Sampling and rain gauge, 1981–2026Mosquito Ridge — Sampling and rain gauge, 1981–2026Mt Hood Test Site — Sampling and rain gauge, 1980–2026Mud Ridge — Sampling and rain gauge, 1978–2026New Crescent Lake — Sampling and rain gauge, 1980–2026North Lost Trail — Sampling and rain gauge, 1985–2026Overland Res. — Sampling and rain gauge, 1989–2026Park Creek Ridge — Sampling and rain gauge, 1978–2026Peterson Meadows — Sampling and rain gauge, 1970–2026Pine Creek Pass — Sampling and rain gauge, 1988–2026Porphyry Creek — Sampling and rain gauge, 1978–2026Quartz Mountain — Sampling and rain gauge, 1980–2026Red Mountain Pass — Sampling and rain gauge, 1980–2026Rio Santa Barbara — Sampling and rain gauge, 2013–2026Rubicon #2 — Sampling and rain gauge, 1980–2026Salt River Summit — Sampling and rain gauge, 1980–2026Savage Pass — Sampling and rain gauge, 1983–2026Sedgwick Peak — Sampling and rain gauge, 1988–2026Sheep Mtn. — Sampling and rain gauge, 1981–2026Silver Creek — Sampling and rain gauge, 1980–2026Smiley Mountain — Sampling and rain gauge, 2001–2026Soldier R.S. — Sampling and rain gauge, 1986–2026Spirit Lake — Sampling and rain gauge, 1984–2026Stampede Pass — Sampling and rain gauge, 1982–2026Stuart Mountain — Sampling and rain gauge, 1994–2026Sun Pass — Sampling and rain gauge, 2006–2026Sylvan Lake — Sampling and rain gauge, 1980–2026Telaquana Lake — Sampling and rain gauge, 2014–2026Timber Creek — Sampling and rain gauge, 1987–2026Toketee Airstrip — Sampling and rain gauge, 2003–2026Tres Ritos — Sampling and rain gauge, 2006–2026Twelvemile Creek — Sampling and rain gauge, 1967–2026Upper Taylor — Sampling and rain gauge, 2009–2026Wood Creek — Sampling and rain gauge, 1978–2026Vernon Creek — Sampling and rain gauge, 1978–2026Webster Flat — Sampling and rain gauge, 1980–2026Whiskey Park — Sampling and rain gauge, 1986–2026Wildhorse Divide — Sampling and rain gauge, 1981–2026Gibson Reservoir — Monitored reservoir, 1930–2026Enders Reservoir — Monitored reservoir, 1950–2026Jamestown Reservoir — Monitored reservoir, 1953–2026Millerton Lake — Monitored reservoir, 1944–2026Fourmile Lake And Fourmile Lake — Monitored reservoir, 1991–2026Jackson Lake And Jackson Lake — Monitored reservoir, 1909–2026Island Park Reservoir — Monitored reservoir, 1938–2026Lucky Peak Lake — Monitored reservoir, 1955–2026Eden Reservoir — Monitored reservoir, 1983–2026Echo Reservoir — Monitored reservoir, 1967–2026Dona Ana County well 321745106492102 — Observation borehole, 1985–2026Sevier County well 353922083345600 — Observation borehole, 1979–2026Klamath County well 430649121305201 — Observation borehole, 1991–2026Transylvania County well 351709082434101 — Observation borehole, 1985–2026Baltimore County well 392931076410301 — Observation borehole, 1991–2026Well 350406089444401 — Observation borehole, 1990–2026Well 420326079295801 — Observation borehole, 1990–2026Well 350534106354702 — Observation borehole, 1991–2026Well 350534106354703 — Observation borehole, 1991–2026Well 415104121232901 — Observation borehole, 1991–2026Well 440918069564001 — Observation borehole, 1978–2026Well 391827074371001 — Observation borehole, 1960–2026Well 373839081255201 — Observation borehole, 1991–2026Well 405959087282901 — Observation borehole, 1976–2025Well 362955089581801 — Observation borehole, 1980–2026Well 350034086422800 — Observation borehole, 1975–2026Well 394426085080601 — Observation borehole, 1984–2026Well 380758115204601 — Observation borehole, 1983–2026Well 322339111170001 — Observation borehole, 1984–2026Well 364313094121101 — Observation borehole, 1982–2026Well 413358071433801 — Observation borehole, 1988–2026Well 424841071004101 — Observation borehole, 1984–2026Well 412154071462901 — Observation borehole, 2002–2026Well 342125084083301 — Observation borehole, 1956–2026Well 391627085534401 — Observation borehole, 1984–2026Well 321058110563301 — Observation borehole, 1990–2026Well 311007081301701 — Observation borehole, 1962–2026TENNESSEE RIVER AT WHITESBURG AL — River gauge, 1867–2026SIPSEY RIVER NR ELROD, AL — River gauge, 1928–2026COLORADO RIVER NEAR GRAND CANYON, AZ — River gauge, 1921–2026GILA RIVER BELOW GILLESPIE DAM, AZ (FLOW BLW DAM) — River gauge, 1921–2026SANTA CRUZ RIVER NEAR NOGALES, AZ. — River gauge, 1913–2026NORTH PLATTE RIVER NEAR NORTHGATE, CO — River gauge, 1904–2026Ouachita River at Remmel Dam above Jones Mill, AR — River gauge, 1928–2026SHETUCKET RIVER NEAR WILLIMANTIC, CT — River gauge, 1904–2026MIDDLE BOULDER CREEK AT NEDERLAND, CO. — River gauge, 1907–2026APISHAPA RIVER NEAR FOWLER, CO — River gauge, 1922–2026EAGLE RIVER AT RED CLIFF, CO. — River gauge, 1910–2026TAYLOR RIVER AT ALMONT, CO. — River gauge, 1910–2026YAMPA RIVER NEAR MAYBELL, CO — River gauge, 1904–2026LA PLATA RIVER AT COLORADO-NEW MEXICO STATE LINE — River gauge, 1920–2026SUWANNEE RIVER AT US 441, AT FARGO, GA — River gauge, 1927–2026KOKEE DITCH NR WAIMEA,KAUAI, HI — River gauge, 1926–1982FLINT RIVER AT GA 32, NEAR OAKFIELD, GA — River gauge, 1925–2026Halawa Stream near Halawa, Molokai, HI — River gauge, 1917–2026KOOLAU DITCH AT NAHIKU WEIR NR NAHIKU, MAUI, HI — River gauge, 1919–2019EB of NF Wailua River nr Lihue, Kauai, HI — River gauge, 1912–2026SANTA FE RIVER NEAR FORT WHITE, FLA. — River gauge, 1927–2026MOJAVE R A AFTON CA — River gauge, 1930–2026TRUCKEE R A TAHOE CITY CA — River gauge, 1909–2026HOOLAWANUI STREAM NR HUELO, MAUI, HI — River gauge, 1911–2026SANTA MARGARITA R NR TEMECULA CA — River gauge, 1923–2026SAN DIEGO R NR SANTEE CA — River gauge, 1912–2026SAN ANTONIO C NR CLAREMONT CA — River gauge, 1917–2026ARROYO SECO NR PASADENA CA — River gauge, 1913–2026PACOIMA C NR SAN FERNANDO CA — River gauge, 1916–2026SESPE C NR FILLMORE — River gauge, 1911–2026TULE R NR PORTERVILLE CA — River gauge, 1902–2026PORTAL POWERPLANT AT HUNTINGTON LAKE CA — River gauge, 1927–2024WARD TUNNEL A INTAKE A FLORENCE LAKE CA — River gauge, 1925–2024FALLS C NR HETCH HETCHY CA — River gauge, 1915–2026MF STANISLAUS R A SBF NR AVERY CA — River gauge, 1905–2026MOKELUMNE R BL CAMANCHE DAM CA — River gauge, 1904–2026THOMES C A PASKENTA CA — River gauge, 1920–2026OREGON C NR NORTH SAN JUAN CA — River gauge, 1911–2026SF FEATHER R A ENTERPRISE CA — River gauge, 1911–2026SF AMERICAN R NR KYBURZ(RIVER ONLY) CA — River gauge, 1922–2026NAPA R NR ST HELENA CA — River gauge, 1929–2026REDWOOD C A ORICK CA — River gauge, 1911–2026WABASH RIVER AT MT. CARMEL, IL — River gauge, 1875–2026KANKAKEE RIVER AT MOMENCE, IL — River gauge, 1915–2026WABASH RIVER AT WABASH, IN — River gauge, 1913–2026LA MOINE RIVER AT RIPLEY, IL — River gauge, 1921–2026EAST FORK WHITE RIVER AT SHOALS, IN — River gauge, 1903–2026WHITE RIVER NEAR NOBLESVILLE IND — River gauge, 1914–2026Des Moines River at Ottumwa, IA — River gauge, 1903–2026Turkey River at Garber, IA — River gauge, 1902–2026KANKAKEE RIVER AT SHELBY, IN — River gauge, 1923–2026Priest River near Priest River, ID — River gauge, 1936–2026FALL RIVER NR CHESTER ID — River gauge, 1920–2026PORTNEUF RIVER AT POCATELLO ID — River gauge, 1898–2026P A LATERAL NR MILNER ID — River gauge, 1919–2019BRUNEAU RIVER NR HOT SPRING ID — River gauge, 1909–2026SALMON RIVER BL YANKEE FORK NR CLAYTON ID — River gauge, 1921–2026DEADWOOD RIVER BL DEADWOOD RES NR LOWMAN ID — River gauge, 1927–2026PALOUSE RIVER NR POTLATCH, ID — River gauge, 1915–2026WEST BRANCH UNION RIVER AT AMHERST, ME — River gauge, 1909–2026DEAD RIVER AT THE FORKS, ME — River gauge, 1902–2026Androscoggin River near Auburn, Maine — River gauge, 1929–2026GREEN RIVER AT MUNFORDVILLE, KY — River gauge, 1915–2026(COE) Red River at Shreveport, LA — River gauge, 1873–2026MARMATON R NR FORT SCOTT, KS — River gauge, 1915–2026WALNUT R AT WINFIELD, KS — River gauge, 1898–2026SOLDIER C NR TOPEKA, KS — River gauge, 1929–2026KALAMAZOO RIVER NEAR FENNVILLE, MI — River gauge, 1929–2026DEER CREEK AT ROCKS, MD — River gauge, 1926–2026TAUNTON RIVER NEAR BRIDGEWATER, MA — River gauge, 1929–2026MOSS BROOK AT WENDELL DEPOT, MA — River gauge, 1916–2026Tarkio River at Fairfax, MO — River gauge, 1922–2026Grand River near Sumner, MO — River gauge, 1924–2026WESTFIELD RIVER AT KNIGHTVILLE, MA — River gauge, 1909–2026Meramec River near Eureka, MO — River gauge, 1903–2026Big Piney River near Big Piney, MO — River gauge, 1921–2026Black River at Leeper, MO — River gauge, 1921–2026PEARL RIVER AT EDINBURG, MS — River gauge, 1902–2026Muddy Creek at Vaughn MT — River gauge, 1925–2026Madison River near West Yellowstone, MT — River gauge, 1913–2026Poplar River near Poplar MT — River gauge, 1908–2026Kootenai River at Libby MT — River gauge, 1910–2026ST. LOUIS RIVER AT SCANLON, MN — River gauge, 1908–2026RUM RIVER NEAR ST. FRANCIS, MN — River gauge, 1930–2026BIG FORK RIVER AT BIG FALLS, MN — River gauge, 1910–2026SOUTH BRANCH TWO RIVERS AT LAKE BRONSON, MN — River gauge, 1928–2026COTTONWOOD RIVER NEAR NEW ULM, MN — River gauge, 1910–2026MUDDY RV NR MOAPA, NV — River gauge, 1913–2026Middle Loup River at Saint Paul, Nebr. — River gauge, 1895–2026N FK HUMBOLDT RV AT DEVILS GATE NR HALLECK, NV — River gauge, 1913–2026HUMBOLDT RV NR RYE PATCH, NV — River gauge, 1915–2026Passaic River at Paterson NJ — River gauge, 1897–2026Whippany River at Morristown NJ — River gauge, 1921–2026Raritan River at Manville NJ — River gauge, 1903–2026Paulins Kill at Blairstown NJ — River gauge, 1921–2026SOUHEGAN RIVER AT MERRIMACK, NH — River gauge, 1909–2026VERMEJO RIVER NEAR DAWSON, NM — River gauge, 1927–2026Delaware River at Trenton NJ — River gauge, 1897–2026CANADIAN RIVER AT LOGAN, NM — River gauge, 1904–2026LOS PINOS RIVER NEAR ORTIZ, CO — River gauge, 1915–2026PECOS RIVER BELOW SUMNER DAM, NM — River gauge, 1913–2026INDIAN RIVER NEAR INDIAN LAKE NY — River gauge, 1912–2026HUDSON RIVER ABOVE LOCK 1 NEAR WATERFORD NY — River gauge, 1913–2026WALLKILL RIVER AT GARDINER NY — River gauge, 1924–2026GENESEE RIVER NEAR MOUNT MORRIS NY — River gauge, 1890–2026MIDDLE BRANCH MOOSE RIVER AT OLD FORGE NY — River gauge, 1912–2026ALLEGHENY RIVER AT SALAMANCA NY — River gauge, 1903–2026SALMON RIVER AT CHASM FALLS NY — River gauge, 1925–2026FISHING CREEK NEAR ENFIELD, NC — River gauge, 1915–2026NORTH BUFFALO CREEK NEAR GREENSBORO, NC — River gauge, 1928–2026LINVILLE RIVER NEAR NEBO, NC — River gauge, 1922–2026MILLS RIVER NEAR MILLS RIVER, NC — River gauge, 1906–2026VALLEY RIVER AT TOMOTLA, NC — River gauge, 1904–2026KNIFE RIVER NEAR GOLDEN VALLEY, ND — River gauge, 1903–2026HEART RIVER NEAR MANDAN, ND — River gauge, 1924–2026Kokosing River at Millwood OH — River gauge, 1921–2026Muskingum River at McConnelsville OH — River gauge, 1913–2026Great Miami River at Taylorsville OH — River gauge, 1913–2026Chagrin River at Willoughby OH — River gauge, 1913–2026Sandusky River near Fremont OH — River gauge, 1923–2026Blanchard River near Findlay OH — River gauge, 1923–2026IMNAHA RIVER AT IMNAHA, OR — River gauge, 1928–2026MALHEUR RIVER BEL WARMSPRINGS RES NR RIVERSIDE OR — River gauge, 1909–2026GRANDE RONDE R AT RONDOWA, OREG. — River gauge, 1926–2026MIDDLE FORK JOHN DAY RIVER AT RITTER, OR — River gauge, 1929–2026LITTLE DESCHUTES RIVER NEAR LA PINE, OR — River gauge, 1912–2026HOOD RIVER AT TUCKER BRIDGE, NEAR HOOD RIVER, OR — River gauge, 1897–2026N FK OF M FK WILLAMETTE R NR OAKRIDGE, OR — River gauge, 1909–2026NORTH SANTIAM RIVER AT MEHAMA, OR — River gauge, 1905–2026CLEARWATER RIVER ABV TRAP CK NR TOKETEE FALLS, OR — River gauge, 1927–2026CLACKAMAS RIVER AT ESTACADA, OR — River gauge, 1908–2026NO FK LITTLE BUTTE CR NR LAKECREEK,OREG. — River gauge, 1911–2026BLACK RIVER AT KINGSTREE, SC — River gauge, 1893–2026SALUDA RIVER NEAR COLUMBIA, SC — River gauge, 1925–2026LITTLE PIGEON RIVER AT SEVIERVILLE, TN — River gauge, 1867–2026EMORY RIVER AT OAKDALE, TN — River gauge, 1927–2026PINEY RIVER AT VERNON, TN — River gauge, 1925–2026OBION RIVER AT OBION, TN — River gauge, 1929–2026Susquehanna River at Towanda, PA — River gauge, 1865–2026Bald Eagle Creek at Beech Creek Station, PA — River gauge, 1910–2026Tuscarora Creek near Port Royal, PA — River gauge, 1889–2026Conestoga River at Lancaster, PA — River gauge, 1928–2026Laurel Hill Creek at Ursina, PA — River gauge, 1914–2026Connoquenessing Creek near Zelienople, PA — River gauge, 1916–2026MAD RIVER NEAR MORETOWN, VT — River gauge, 1927–2026CHEYENNE RIVER NEAR WASTA, SD — River gauge, 1915–2026SOUTH RIVER AT HARRISTON, VA — River gauge, 1925–2026COWPASTURE RIVER NEAR CLIFTON FORGE, VA — River gauge, 1925–2026APPOMATTOX RIVER AT MATTOAX, VA — River gauge, 1901–2026BANISTER RIVER AT HALIFAX, VA — River gauge, 1904–2026NEW RIVER AT GLEN LYN, VA — River gauge, 1878–2026Sabine Rv nr Bon Wier, TX — River gauge, 1913–2026Elm Fk Trinity Rv nr Carrollton, TX — River gauge, 1908–2026Leon Rv nr Belton, TX — River gauge, 1921–2026N Bosque Rv nr Clifton, TX — River gauge, 1922–2026Concho Rv at San Angelo, TX — River gauge, 1906–2026San Saba Rv at San Saba, TX — River gauge, 1916–2026ASHLEY CREEK NEAR VERNAL, UT — River gauge, 1912–2026STRAWBERRY RIVER AT DUCHESNE, UTAH — River gauge, 1909–2026SAN RAFAEL RIVER NEAR GREEN RIVER, UT — River gauge, 1909–2026SPANISH FORK AT CASTILLA, UT — River gauge, 1903–2026WEBER RIVER NEAR COALVILLE, UT — River gauge, 1927–2026SEVIER RIVER BELOW PIUTE DAM, NEAR MARYSVALE, UT — River gauge, 1912–2026SOUTH BRANCH POTOMAC RIVER NEAR SPRINGFIELD, WV — River gauge, 1899–2026BIG SANDY CREEK AT ROCKVILLE, WV — River gauge, 1888–2026KANAWHA RIVER AT KANAWHA FALLS, WV — River gauge, 1878–2026POCATALICO RIVER AT SISSONVILLE, WV — River gauge, 1908–2026NORTH PLATTE RIVER AT ORIN, WY — River gauge, 1895–2026LARAMIE RIVER NEAR JELM, WY — River gauge, 1905–2026SNAKE RIVER NEAR MORAN, WY — River gauge, 1903–2026GREYS RIVER ABOVE RESERVOIR, NEAR ALPINE, WY — River gauge, 1918–2026APPLE RIVER NEAR SOMERSET, WI — River gauge, 1914–2026BLACK RIVER AT NEILLSVILLE, WI — River gauge, 1905–2026WYNOOCHEE RIVER ABOVE SAVE CREEK NEAR ABERDEEN, WA — River gauge, 1925–2026NORTH RIVER NEAR RAYMOND, WA — River gauge, 1927–2026SNOQUALMIE RIVER NEAR CARNATION, WA — River gauge, 1929–2026OHOP CREEK NEAR EATONVILLE, WA — River gauge, 1927–2026PEND OREILLE RIVER BL Z CNYN NR METALINE FALLS, WA — River gauge, 1912–2026STEHEKIN RIVER AT STEHEKIN, WA — River gauge, 1911–2026YAKIMA RIVER AT UMTANUM, WA — River gauge, 1906–2026YAKIMA RIVER AT KIONA, WA — River gauge, 1878–2026EAST FORK LEWIS RIVER NEAR HEISSON, WA — River gauge, 1929–2026ARKANSAS RIVER AT LAMAR, CO — River gauge, 1913–2026RIO GRANDE AT ALAMOSA, CO. — River gauge, 1912–2026White River at Georgetown, AR — River gauge, 1913–2026CASCADE C NR PETERSBURG AK — River gauge, 1917–2026BARANOF R AT BARANOF AK — River gauge, 1915–2026BROAD RIVER ABOVE CARLTON, GA — River gauge, 1898–2026CHATTAHOOCHEE RIVER AT US 280, NEAR COLUMBUS, GA — River gauge, 2002–2026SOUTH PLATTE RIVER AT DENVER, CO. — River gauge, 1899–2026ARKANSAS RIVER AT LA JUNTA, CO — River gauge, 1894–2026SANGRE DE CRISTO CREEK NEAR FORT GARLAND, CO. — River gauge, 1923–2026ROARING FORK RIVER AT ASPEN, CO. — River gauge, 1911–2026CIMARRON RIVER AT CIMARRON, CO. — River gauge, 1904–2026HERMOSA CREEK NEAR HERMOSA, CO. — River gauge, 1920–2026M B PUOHOKAMOA STR AT HAIKU-UKA BDRY NR KAILIILI — River gauge, 1920–2026MYRTLE CREEK NR BONNERS FERRY ID — River gauge, 2002–2026GRAYS LAKE OUTLET NR HERMAN ID — River gauge, 2002–2026BEAVER CREEK AT DUBOIS ID — River gauge, 1922–2026EF BRUNEAU RIVER NR HOT SPRING ID — River gauge, 1911–2026CRANE CREEK NR MIDVALE ID — River gauge, 1928–2026FALLS C NR WHITE WATER CA — River gauge, 1995–2026SAN TIMOTEO C NR REDLANDS CA — River gauge, 1927–2026PIRU C NR PIRU CA — River gauge, 1933–2026KERN R A KERNVILLE CA — River gauge, 1950–2026STEVENSON C A SHAVER LK CA — River gauge, 1917–2026STONY C NR FRUTO CA — River gauge, 1901–2026COFFEE C NR TRINITY CENTER CA — River gauge, 1958–2026LICKING RIVER AT FARMERS, KY — River gauge, 1938–2026GREEN RIVER AT LOCK 6 AT BROWNSVILLE, KY — River gauge, 1907–2026Kenduskeag Stream near Bangor, Maine — River gauge, 1909–2026PELICAN RIVER NEAR FERGUS FALLS, MN — River gauge, 1909–2026YALOBUSHA RIVER AT GRENADA, MS — River gauge, 1929–2026PEAK SPGS CYN CK NR CHARLESTON PEAK, NV — River gauge, 1978–2026SAPELLO RIVER AT SAPELLO, NM — River gauge, 1957–2026SHAWANGUNK KILL AT PINE BUSH NY — River gauge, 1925–2026DIAL CREEK NEAR BAHAMA, NC — River gauge, 1926–2026North Canadian River at Woodward, OK — River gauge, 1938–2026Licking River at Toboso OH — River gauge, 1903–2026Grand River near Madison OH — River gauge, 1923–2026Pin Oak Ck nr Hubbard, TX — River gauge, 1957–2026Yegua Ck nr Somerville, TX — River gauge, 1913–2026Pecos Rv at Pecos, TX — River gauge, 1899–2026BULLY CREEK AT WARMSPRINGS NEAR VALE,OREG. — River gauge, 1904–2026MCKENZIE R AT MCKENZIE BRIDGE, OREG. — River gauge, 1910–2026Neshaminy Creek at Rushland, PA. — River gauge, 2026–2026RICHLAND CREEK NEAR DAYTON, TN — River gauge, 1903–2026LAKE FORK RIVER NEAR MYTON, UT — River gauge, 1915–2026HOBBLE CR NR SPRINGVILLE UTAH — River gauge, 1904–2026LITTLE KANAWHA RIVER AT GLENVILLE, WV — River gauge, 1912–2026TWELVEPOLE CREEK AT WAYNE, WV — River gauge, 1915–2026ROCK CREEK AT ARLINGTON, WY — River gauge, 1911–2026LARAMIE R AND PIONEER CANAL NR WOODS LANDING, WY — River gauge, 1912–2026Hams Fork at Diamondville, WY — River gauge, 1918–2026JAMES RIVER AT BENT CREEK, VA — River gauge, 1870–2026SOLEDUCK RIVER NEAR FAIRHOLM, WA — River gauge, 1917–2026SAUK RIVER AT DARRINGTON, WA — River gauge, 1909–2026COLUMBIA RIVER AT TRINIDAD, WA — River gauge, 1894–2026TROUT LAKE CREEK NEAR TROUT LAKE, WA — River gauge, 1909–2026Madison River near Three Forks MT — River gauge, 1894–2026Cut Bank Creek near Browning MT — River gauge, 1918–2026Beaver Creek near Hinsdale MT — River gauge, 1912–2026Rock Creek at Rockvale MT — River gauge, 1921–2026Bitterroot River near Missoula MT — River gauge, 1899–2026Teller Reservoir Near Stone City, Co. — Monitored reservoir, 1978–2019Ute Reservoir Near Logan, NM — Monitored reservoir, 1974–2026Lk Kickapoo Nr Archer City, TX — Monitored reservoir, 1946–1998Nichols Reservoir Near Santa Fe N Mex — Monitored reservoir, 1965–2026Silver Jack Reservoir Near Cimarron, CO — Monitored reservoir, 1984–2026San Carlos Reservoir At Coolidge Dam, AZ — Monitored reservoir, 1982–2026Piute Reservoir Near Marysvale, UT — Monitored reservoir, 1914–2019Hetch Hetchy Res A Hetch Hetchy CA — Monitored reservoir, 1930–2026Milner Lake At Milner Dam ID — Monitored reservoir, 1978–2019
400 of 3,792 locations drawn, sampled evenly across the network so the map stays a reasonable size and still shows where coverage is dense and where it is thin. Every location is held in full and reachable through the data.

What is measured

MeasurementLocationsValues held
Daily precipitation662,751,175
Snow water equivalent851376,964
Daily minimum air temperature8316,159
Daily maximum air temperature8315,836
Snow depth8250,971
Annual maximum river flow2,236175,042
Mean river flow, water year1,749149,566
Mean river flow1,750148,948
Nitric acid in air121147,960
Particulate nitrate in air122147,951
Particulate sulphate in air121147,948
Particulate ammonium in air121147,255
Dry nitric acid deposition105141,795
Dry sulphate deposition105141,781
Dry particulate nitrate deposition105141,777
Dry ammonium deposition105141,111
Sulphur dioxide in air122140,230
Reservoir stored volume187135,522
Dry sulphur dioxide deposition105134,245
Depth to groundwater250101,337
Reservoir water level9474,643
Burned area within 50 km1,88167,716
Reservoir release6851,318
Reservoir inflow4129,631
Facility water withdrawal8347,414
Facility water consumption8136,943
Catchment area2,2572,257
Facility reclaimed water use69611

What kind of place is monitored

KindLocations
River gauges2,314
Sampling and rain gauges1,878
Observation boreholes250
Monitored reservoirs188

Elsewhere

All networks · the underlying series are published through the dataset catalogue and the static API.

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