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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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All countries

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
ASHLEY WWTPAshley0.39 MGD (million gallons per day)2022
IDA GROVE WWTPIda Grove0.39 MGD (million gallons per day)2022
SOUTH SHORE STP& CSSouth Shore0.39 MGD (million gallons per day)2022
MILO WWTFMilo0.39 MGD (million gallons per day)2022
ITHACA WWSLIthaca0.39 MGD (million gallons per day)2022
Steele Aerated LagoonSteele0.39 MGD (million gallons per day)2022
New Madrid WWTPNew Madrid0.39 MGD (million gallons per day)2022
Dawson County W Glendive WastewaterGlendive0.39 MGD (million gallons per day)2022
SUPERIOR WWTPSuperior0.39 MGD (million gallons per day)2022
McComb WWTP & Sewer SystemMc Comb0.39 MGD (million gallons per day)2022
HASKELL PWA WWTHaskell0.39 MGD (million gallons per day)2022
Henrietta South PlantHenrietta0.39 MGD (million gallons per day)2022
POINT AQUARIUS STPHouston0.39 MGD (million gallons per day)2022
ELDORADO STPEldorado0.39 MGD (million gallons per day)2022
NIAGARA WWTPNiagara0.39 MGD (million gallons per day)2022
HOLLAND SD #1 WWTPKaukauna0.39 MGD (million gallons per day)2022
WHITE PINE WWTPWhite Pine0.389 MGD (million gallons per day)2022
Lula WPCPLula0.387 MGD (million gallons per day)2022
VAN HORNE WWTPVan Horne0.387 MGD (million gallons per day)2022
ROWLAND WWTPRowland0.387 MGD (million gallons per day)2022
BROWERVILLE WWTPBrowerville0.386 MGD (million gallons per day)2022
Galva Northeast STPGalva0.385 MGD (million gallons per day)2022
ELKHORN CITY STPElkhorn City0.385 MGD (million gallons per day)2022
Aberdeen WWTP & SewersAberdeen0.385 MGD (million gallons per day)2022
MONDOVI WWTPMondovi0.385 MGD (million gallons per day)2022
BOOTHBAY HARBOR WWTFBoothbay Harbor0.383 MGD (million gallons per day)2022
SANDSTONE WWTPSandstone0.383 MGD (million gallons per day)2022
Sodus (V) WWTPSodus0.383 MGD (million gallons per day)2022
LYONS WWTPLyons0.381 MGD (million gallons per day)2022
NEW LISBON STPNew Lisbon0.381 MGD (million gallons per day)2022
BIGGS WWTFGridley0.38 MGD (million gallons per day)2022
Kersey Sanitation DistrictKersey0.38 MGD (million gallons per day)2022
PAUL SEWAGE TRT FACPaul0.38 MGD (million gallons per day)2022
EARLVILLE STPEarlville0.38 MGD (million gallons per day)2022
DELAVAN STPDelavan0.38 MGD (million gallons per day)2022
METAMORA SOUTH STPMetamora0.38 MGD (million gallons per day)2022
DE PUE STPDepue0.38 MGD (million gallons per day)2022
CARROLTON STPCarrollton0.38 MGD (million gallons per day)2022
EAST DUBUQUE WWTPEast Dubuque0.38 MGD (million gallons per day)2022
SENECA STPSeneca0.38 MGD (million gallons per day)2022
BATTLE GROUND UTILITIES WWTPBattle Ground0.38 MGD (million gallons per day)2022
SHIPSHEWANA WWTPShipshewana0.38 MGD (million gallons per day)2022
ALBERT CITY WWTPAlbert City0.38 MGD (million gallons per day)2022
RANGELEY WWTFRangeley0.38 MGD (million gallons per day)2022
Hancock STPHancock0.38 MGD (million gallons per day)2022
EAST JORDAN STPEast Jordan0.38 MGD (million gallons per day)2022
NEW YORK MILLS WWTPNew York Mills0.38 MGD (million gallons per day)2022
Warren Township Stage V STPWarren0.38 MGD (million gallons per day)2022
Sparta Township - CS/STPSparta0.38 MGD (million gallons per day)2022
Marcellus (V) STPMarcellus0.38 MGD (million gallons per day)2022
Richwood WWTP & Sewer SystemRichwood0.38 MGD (million gallons per day)2022
Sabina WWTP & Sewer SystemSabina0.38 MGD (million gallons per day)2022
NEWKIRK WWTFNewkirk0.38 MGD (million gallons per day)2022
DAVIS WWTDavis0.38 MGD (million gallons per day)2022
Abernathy WWTPLubbock0.38 MGD (million gallons per day)2022
FAIRVIEWFairview0.38 MGD (million gallons per day)2022
Richford WWTFRichford0.38 MGD (million gallons per day)2022
Crooked Run WWTPWinchester0.38 MGD (million gallons per day)2022
LOVETTSVILLE S T PLovettsville0.38 MGD (million gallons per day)2022
Grand Mound WWTPRochester0.38 MGD (million gallons per day)2022
SHINNSTON WWTPShinnston0.38 MGD (million gallons per day)2022
WASHBURN WWTPWashburn0.38 MGD (million gallons per day)2022
SPRING GROVE WWTPSpring Grove0.378 MGD (million gallons per day)2022
Seymour WWTPSeymour0.378 MGD (million gallons per day)2022
Itasca WWTPItasca0.378 MGD (million gallons per day)2022
CLINTON STPClinton0.378 MGD (million gallons per day)2022
Daleville-Southeast LagoonDaleville0.375 MGD (million gallons per day)2022
Star City WWTPStar City0.375 MGD (million gallons per day)2022
WESTMORLAND WWTFWestmorland0.375 MGD (million gallons per day)2022
Cedaredge, Town ofCedaredge0.375 MGD (million gallons per day)2022
STERLINGTON STPSterlington0.375 MGD (million gallons per day)2022
Oak Bluffs Sewerage Collection System and WWTFOak Bluffs0.375 MGD (million gallons per day)2022
GARRISON-KATHIO-MILLE LACS SDGarrison0.375 MGD (million gallons per day)2022
STANTONSBURG WWTPStantonsburg0.375 MGD (million gallons per day)2022
Minford Area WWTPMinford0.375 MGD (million gallons per day)2022
HOMINY WWTHominy0.375 MGD (million gallons per day)2022
Ballinger WWTPBallinger0.375 MGD (million gallons per day)2022
SPOONER WWTPSpooner0.375 MGD (million gallons per day)2022
SO BERWICK SEWAGE PLANTSouth Berwick0.374 MGD (million gallons per day)2022
Concordia S.E. LagoonConcordia0.374 MGD (million gallons per day)2022
River Rock County W & S DistrictBelgrade0.374 MGD (million gallons per day)2022
PHILLIPS STPPhillips0.374 MGD (million gallons per day)2022
CALMAR WWTPCalmar0.372 MGD (million gallons per day)2022
SLAYTON WWTPSlayton0.371 MGD (million gallons per day)2022
Hardwick WWTFHardwick0.371 MGD (million gallons per day)2022
JUNE LAKE WWTFJune Lake0.37 MGD (million gallons per day)2022
RiceboroRiceboro0.37 MGD (million gallons per day)2022
HEYBURN STPHeyburn0.37 MGD (million gallons per day)2022
NEOGA STPNeoga0.37 MGD (million gallons per day)2022
MT STERLING STP,N.E.Mount Sterling0.37 MGD (million gallons per day)2022
WATERLOO WWTPWaterloo0.37 MGD (million gallons per day)2022
TURKEY CREEK RSD WWTPCromwell0.37 MGD (million gallons per day)2022
Twin Lakes RSD Rattlesnake CreekMonticello0.37 MGD (million gallons per day)2022
MOVILLE WWTPMoville0.37 MGD (million gallons per day)2022
MT VERNON WWTPMount Vernon0.37 MGD (million gallons per day)2022
CLINTON WWTFClinton0.37 MGD (million gallons per day)2022
Cherry Hill WWTPElkton0.37 MGD (million gallons per day)2022
SUTTONS BAY STPSuttons Bay0.37 MGD (million gallons per day)2022
VALENTINE WWTPValentine0.37 MGD (million gallons per day)2022
AUBURN WWTPAuburn0.37 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.