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World wastewater treatment plant observatory · data as reported by each inventory

Wastewater treatment plants in the United States

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17,009 inventory records · EPA Clean Watersheds Needs Survey 2022

Data years: 2022. The inventory date does not establish current operation.

States

17,009 results

CompareNameNative sizeYear
TANEYTOWN STPTaneytown1.1 MGD (million gallons per day)2022
Winchendon Sewerage Collection System and WPCFWinchendon1.1 MGD (million gallons per day)2022
ST. CLAIR RIVER SA WWTPEast China1.1 MGD (million gallons per day)2022
OTSEGO EAST WWTPRogers1.1 MGD (million gallons per day)2022
Cassville WWTPCassville1.1 MGD (million gallons per day)2022
GLENDIVE WWT FACILITYGlendive1.1 MGD (million gallons per day)2022
LEXINGTON WWTPLexington1.1 MGD (million gallons per day)2022
Hooksett WWTFHooksett1.1 MGD (million gallons per day)2022
Charlestown WWTFCharlestown1.1 MGD (million gallons per day)2022
Carmel (T) SD #2 STPCarmel1.1 MGD (million gallons per day)2022
Tupper Lake (V) WWTPTupper Lake1.1 MGD (million gallons per day)2022
Clayton (V) WWTPClayton1.1 MGD (million gallons per day)2022
TABOR CITY WWTPTabor City1.1 MGD (million gallons per day)2022
Leipsic WWTP & Sewer SystemLeipsic1.1 MGD (million gallons per day)2022
Pataskala WWTP & Sewer SystemPataskala1.1 MGD (million gallons per day)2022
JAY UA WWTJay1.1 MGD (million gallons per day)2022
JENKS PWA WWTJenks1.1 MGD (million gallons per day)2022
PRINEVILLE STPPrineville1.1 MGD (million gallons per day)2022
TELFORD BORO AUTH STPTelford1.1 MGD (million gallons per day)2022
KENNETT SQUARE BOROKennett Square1.1 MGD (million gallons per day)2022
BJWSA/CHERRY POINTE WWTPOkatie1.1 MGD (million gallons per day)2022
Spring City NEW LAKE RD PLTSpring City1.1 MGD (million gallons per day)2022
South STPMc Gregor1.1 MGD (million gallons per day)2022
North Spring WWTPSpring1.1 MGD (million gallons per day)2022
Gruene WWTPNew Braunfels1.1 MGD (million gallons per day)2022
Lockhart & GBRALockhart1.1 MGD (million gallons per day)2022
Brady WWTPBrady1.1 MGD (million gallons per day)2022
WAPATO STPWapato1.1 MGD (million gallons per day)2022
CASHMERE STP FACILITYCashmere1.1 MGD (million gallons per day)2022
WELLS-EASTON-MN LAKE WWTFWells1.088 MGD (million gallons per day)2022
SALINASalina1.085 MGD (million gallons per day)2022
Kenedy WWTPKenedy1.083 MGD (million gallons per day)2022
PLAINFIELD NORTH WPCFCentral Village1.08 MGD (million gallons per day)2022
BERNE WWTPBerne1.08 MGD (million gallons per day)2022
GREENFIELD WWTPGreenfield1.08 MGD (million gallons per day)2022
Spencer Sewerage Collection System and WWTFSpencer1.08 MGD (million gallons per day)2022
Walden (V) Sewers & WWTPWalden1.08 MGD (million gallons per day)2022
EDENTON WWTPEdenton1.076 MGD (million gallons per day)2022
OSAGE, WWTPOsage1.071 MGD (million gallons per day)2022
ASHLAND WWTPAshland1.07 MGD (million gallons per day)2022
Exeter WWTFExeter1.07 MGD (million gallons per day)2022
ORONO WWTPOrono1.07 MGD (million gallons per day)2022
SUTHERLIN STPSutherlin1.07 MGD (million gallons per day)2022
RIPON WWTFRipon1.069 MGD (million gallons per day)2022
WAPELLO STLWapello1.06 MGD (million gallons per day)2022
St. Clair WWTPSaint Clair1.06 MGD (million gallons per day)2022
TILLAMOOK STPTillamook1.06 MGD (million gallons per day)2022
Yelm Wastewater Treat and ReclaimYelm1.06 MGD (million gallons per day)2022
MELCHER-DALLAS WWTPMelcher1.059 MGD (million gallons per day)2022
Cochran WWTPCochran1.05 MGD (million gallons per day)2022
HILLSBORO STPHillsboro1.05 MGD (million gallons per day)2022
SYRACUSE WWTPSyracuse1.05 MGD (million gallons per day)2022
VERONA POTWVerona1.05 MGD (million gallons per day)2022
Palmyra Borough - CS/STPPalmyra1.05 MGD (million gallons per day)2022
Dona Ana Co. South Central Regional WWTPLa Mesa1.05 MGD (million gallons per day)2022
ANTRIM TWP STPGreencastle1.05 MGD (million gallons per day)2022
Ludlow WWTFLudlow1.05 MGD (million gallons per day)2022
MAUSTON STPMauston1.05 MGD (million gallons per day)2022
Herculaneum WWTPHerculaneum1.045 MGD (million gallons per day)2022
Jefferson (Central City WPCP)Jefferson1.042 MGD (million gallons per day)2022
Sunset WWTPColorado Springs1.04 MGD (million gallons per day)2022
Orange Sewerage Collection System and WWTFOrange1.04 MGD (million gallons per day)2022
MILFORD WWTPMilford1.04 MGD (million gallons per day)2022
Newport - Guild Street WWTFGuild1.04 MGD (million gallons per day)2022
Spearfish, City ofSpearfish1.04 MGD (million gallons per day)2022
WILLIAMSON WWTPWilliamson1.04 MGD (million gallons per day)2022
Las Animas, City of WWTPLas Animas1.03 MGD (million gallons per day)2022
TAOS STPTaos1.03 MGD (million gallons per day)2022
Breckenridge SDBreckenridge1.028 MGD (million gallons per day)2022
City of Clayton WPCPClayton1.025 MGD (million gallons per day)2022
SILVER LAKE SD STPSilver Lake1.025 MGD (million gallons per day)2022
Madison Indian Creek WRFMadison1.02 MGD (million gallons per day)2022
REEDSPORT STPReedsport1.02 MGD (million gallons per day)2022
ROCKWELL CITY WWTPRockwell City1.015 MGD (million gallons per day)2022
Benton WWTP & Collection SystemBenton1.01 MGD (million gallons per day)2022
GIBBON WWTPGibbon1.01 MGD (million gallons per day)2022
Baltimore WWTP & Sewer SystemBaltimore1.01 MGD (million gallons per day)2022
CALIFORNIA STPCalifornia1.01 MGD (million gallons per day)2022
JOHNSONBURG BORO STPJohnsonburg1.01 MGD (million gallons per day)2022
BJWSA/HardeevilleHardeeville1.01 MGD (million gallons per day)2022
Dalhart WWTPDalhart1.01 MGD (million gallons per day)2022
Tulia WWTPTulia1.01 MGD (million gallons per day)2022
ILWACO WASTEWATER TREATMENT PLANTIlwaco1.01 MGD (million gallons per day)2022
OMAK STPOmak1.01 MGD (million gallons per day)2022
North Hawkinsville WPCPHawkinsville1.007 MGD (million gallons per day)2022
LA FAYETTE MILL CREEK WWTPLafayette1 MGD (million gallons per day)2022
SATSUMA WWTPSatsuma1 MGD (million gallons per day)2022
WINFIELD WWTPWinfield1 MGD (million gallons per day)2022
Bridgeport LagoonBridgeport1 MGD (million gallons per day)2022
CENTRE LAGOONCentre1 MGD (million gallons per day)2022
MONROEVILLE DOUBLE BRANCH WWTPMonroeville1 MGD (million gallons per day)2022
Petersburg WWTPPetersburg1 MGD (million gallons per day)2022
Buckeye Festival Ranch Wastewater PlantBuckeye1 MGD (million gallons per day)2022
Buckeye Tartesso West WRFBuckeye1 MGD (million gallons per day)2022
San Luis East Mesa WWTPSan Luis1 MGD (million gallons per day)2022
Morrilton WWTPMorrilton1 MGD (million gallons per day)2022
Monticello - East WWTPMonticello1 MGD (million gallons per day)2022
North Fresno Wastewater Reclamation FacilityFresno1 MGD (million gallons per day)2022
Fort Bragg WWTPFort Bragg1 MGD (million gallons per day)2022
CLOVERDALE WWTFCloverdale1 MGD (million gallons per day)2022

Regulatory context

General reference. This is not an exhaustive review of applicable law.

United States: Clean Water Act / NPDES

NPDES regulates pollutant discharges from point sources to waters of the United States. The permit sets limits and monitoring conditions. A CWNS code identifies an inventory record, not an NPDES permit.

  • Permit identifier and permitting authority: EPA or an authorized state.
  • Outfall and receiving water; sewer connections follow a different control route.
  • Current permit conditions, limits and dated measurements; these are not included in CWNS.

References reviewed: 2026-11-06. Individual applicability: undetermined. This profile does not establish authorization or compliance.