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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
AHOSKIE WWTPAhoskie0.8 MGD (million gallons per day)2022
COLUMBUS WWTPColumbus0.8 MGD (million gallons per day)2022
PLYMOUTH WWTPPlymouth0.8 MGD (million gallons per day)2022
BLOWING ROCK WWTPBlowing Rock0.8 MGD (million gallons per day)2022
GRAFTON WASTEWATERGrafton0.8 MGD (million gallons per day)2022
Caldwell WWTP & Sewer SystemCaldwell0.8 MGD (million gallons per day)2022
Fairfield Co Sycamore Creek WRFPickerington0.8 MGD (million gallons per day)2022
Cridersville WWTP & Sewer SystemWapakoneta0.8 MGD (million gallons per day)2022
Georgetown WWTP & Sewer SystemGeorgetown0.8 MGD (million gallons per day)2022
Lodi WWTP & Sewer SystemLodi0.8 MGD (million gallons per day)2022
Brown Twp/Malvern Sewer DistrictMalvern0.8 MGD (million gallons per day)2022
New Lebanon WWTP & Sewer SystemNew Lebanon0.8 MGD (million gallons per day)2022
Butler Co New Miami WWTPHamilton0.8 MGD (million gallons per day)2022
North Baltimore WWTP & Sewer SystemNorth Baltimore0.8 MGD (million gallons per day)2022
KINGFISHER PWA WWTKingfisher0.8 MGD (million gallons per day)2022
HOLDENVILLE PWA WWTHoldenville0.8 MGD (million gallons per day)2022
CHANDLER MA WWTChandler0.8 MGD (million gallons per day)2022
ANTLERS WWTAntlers0.8 MGD (million gallons per day)2022
CRESWELL STPCreswell0.8 MGD (million gallons per day)2022
JENNER AREA BOSWELL STPBoswell0.8 MGD (million gallons per day)2022
PETERS TWP - BRUSH RUN STPCanonsburg0.8 MGD (million gallons per day)2022
CELINA WWTPCelina0.8 MGD (million gallons per day)2022
MADISONVILLE WWTPMadisonville0.8 MGD (million gallons per day)2022
PARSONS STPParsons0.8 MGD (million gallons per day)2022
S-5 Water Recycling PlantAustin0.8 MGD (million gallons per day)2022
Elsa WWTPElsa0.8 MGD (million gallons per day)2022
Dilley WWTPDilley0.8 MGD (million gallons per day)2022
Sinton WWTPSinton0.8 MGD (million gallons per day)2022
Palacios WWTPPalacios0.8 MGD (million gallons per day)2022
Northeast WWTP - Copperas CoveCopperas Cove0.8 MGD (million gallons per day)2022
Hallsville WWTPHallsville0.8 MGD (million gallons per day)2022
Leonard WWTPLeonard0.8 MGD (million gallons per day)2022
WILLIS STPWillis0.8 MGD (million gallons per day)2022
Coleman WWTPColeman0.8 MGD (million gallons per day)2022
Castlebridge WWTPHouston0.8 MGD (million gallons per day)2022
MOUNTAIN GREENEnterprise0.8 MGD (million gallons per day)2022
HILDALEHildale0.8 MGD (million gallons per day)2022
Troy Jay WWTFTroy0.8 MGD (million gallons per day)2022
ELKTON STPElkton0.8 MGD (million gallons per day)2022
LOUISA REGIONAL WWTPLouisa0.8 MGD (million gallons per day)2022
HICKORY FLATS-JONESVILLEJonesville0.8 MGD (million gallons per day)2022
Castle Rock WWTPCastle Rock0.8 MGD (million gallons per day)2022
Kalama Wastewater Treatment PlantKalama0.8 MGD (million gallons per day)2022
SHEPHERDSTOWN WWTPShepherdstown0.8 MGD (million gallons per day)2022
UNION WILLIAMS PSDWaverly0.8 MGD (million gallons per day)2022
SARATOGA LAGOONSaratoga0.8 MGD (million gallons per day)2022
THERMOPOLIS LAGOONThermopolis0.8 MGD (million gallons per day)2022
FARLEY WWTPFarley0.794 MGD (million gallons per day)2022
Twin Lakes RSD - Big Monon BayMonticello0.792 MGD (million gallons per day)2022
WEST BRANCHWest Branch0.792 MGD (million gallons per day)2022
Long Beach WWTPLong Beach0.791 MGD (million gallons per day)2022
DIKE WWTPDike0.79 MGD (million gallons per day)2022
Fayette WWTPFayette0.79 MGD (million gallons per day)2022
Spearman WWTPSpearman0.79 MGD (million gallons per day)2022
Cash SUD - Bearpen Creek WWTPGreenville0.79 MGD (million gallons per day)2022
PE ELL STPPe Ell0.79 MGD (million gallons per day)2022
Davenport WWTFDavenport0.788 MGD (million gallons per day)2022
Caseyville Township West FacilityFairview Heights0.786 MGD (million gallons per day)2022
EVERLY WTPEverly0.785 MGD (million gallons per day)2022
Barron-Cameron WWTPBarron0.784 MGD (million gallons per day)2022
MONTROSE WWTPMontrose0.781 MGD (million gallons per day)2022
Red Bay WWTPRed Bay0.78 MGD (million gallons per day)2022
NEW BADEN STPNew Baden0.78 MGD (million gallons per day)2022
GENOA, CITY OFGenoa0.78 MGD (million gallons per day)2022
HARTLEY WWTPHartley0.78 MGD (million gallons per day)2022
MOUNT AYR WASTEWATERMount Ayr0.78 MGD (million gallons per day)2022
PRAIRIE CITY STLPrairie City0.78 MGD (million gallons per day)2022
WILTON WWTPWilton0.78 MGD (million gallons per day)2022
HODGENVILLEHodgenville0.78 MGD (million gallons per day)2022
TRUMAN WWTPTruman0.78 MGD (million gallons per day)2022
SPRINGFIELD WWTPSpringfield0.78 MGD (million gallons per day)2022
Scott City WWTPScott City0.78 MGD (million gallons per day)2022
Forsyth WWTPForsyth0.78 MGD (million gallons per day)2022
Appleton City WWTPAppleton City0.78 MGD (million gallons per day)2022
LOUP CITY WWTPLoup City0.78 MGD (million gallons per day)2022
Portville (V) WWTPPortville0.78 MGD (million gallons per day)2022
West Union WWTP & Sewer SystemWest Union0.78 MGD (million gallons per day)2022
JASPER LAGOONJasper0.78 MGD (million gallons per day)2022
Fairfield Village Regional WWTPCypress0.78 MGD (million gallons per day)2022
LADYSMITH WWTPLadysmith0.778 MGD (million gallons per day)2022
BELMOND WWTPBelmond0.777 MGD (million gallons per day)2022
VALPARAISO COLL SYSValparaiso0.775 MGD (million gallons per day)2022
Dexter West WWTPDexter0.775 MGD (million gallons per day)2022
VILLISCA WWTPVillisca0.774 MGD (million gallons per day)2022
WESTVILLE-BELGIUM STPWestville0.77 MGD (million gallons per day)2022
CHRISTOPHER STPChristopher0.77 MGD (million gallons per day)2022
Lamar WWTPLamar0.77 MGD (million gallons per day)2022
CHOCTAW WWTChoctaw0.77 MGD (million gallons per day)2022
COLLINSVILLE MA WWTCollinsville0.77 MGD (million gallons per day)2022
ALVA WWTAlva0.77 MGD (million gallons per day)2022
Union WSC WWTP (non-profit)Garciasville0.77 MGD (million gallons per day)2022
Crosby WWTPCrosby0.77 MGD (million gallons per day)2022
HAYWARD WWTPHayward0.77 MGD (million gallons per day)2022
CONSOLIDATED KOSHKONONG SD - STPEdgerton0.769 MGD (million gallons per day)2022
MONDAMIN STLMondamin0.766 MGD (million gallons per day)2022
GONZALES WWTFGonzales0.763 MGD (million gallons per day)2022
Belleview WWTFBelleview0.76 MGD (million gallons per day)2022
Alamo WPCPAlamo0.76 MGD (million gallons per day)2022
North Brookfield Sewerage Collection System and WWTPNorth Brookfield0.76 MGD (million gallons per day)2022
Silver Creek (V) WWTPSilver Creek0.76 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.