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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
HENDERSON LAGOON - NORTHHenderson0.47 MGD (million gallons per day)2022
New Johnsovnville WWTPNew Johnsonville0.47 MGD (million gallons per day)2022
CASTLE DALECastle Dale0.47 MGD (million gallons per day)2022
BLANDINGBlanding0.47 MGD (million gallons per day)2022
CAMPBELLSPORT STPCampbellsport0.47 MGD (million gallons per day)2022
POYNETTE WWTPPoynette0.47 MGD (million gallons per day)2022
HEDRICK WWTPHedrick0.465 MGD (million gallons per day)2022
STATE CENTER WWTPState Center0.465 MGD (million gallons per day)2022
FERRONFerron0.465 MGD (million gallons per day)2022
ROBERTS STPRoberts0.465 MGD (million gallons per day)2022
TRACY WWTPTracy0.462 MGD (million gallons per day)2022
LA SALLE WWTPLa Salle0.46 MGD (million gallons per day)2022
EL PASO STPEl Paso0.46 MGD (million gallons per day)2022
TILTON STPTilton0.46 MGD (million gallons per day)2022
ROSEVILLE STPRoseville0.46 MGD (million gallons per day)2022
KNIGHTSTOWN STPKnightstown0.46 MGD (million gallons per day)2022
LAKE VIEW WWTPLake View0.46 MGD (million gallons per day)2022
WINTHROP STPWinthrop0.46 MGD (million gallons per day)2022
ELKTONElkton0.46 MGD (million gallons per day)2022
BOONSBORO WWTPBoonsboro0.46 MGD (million gallons per day)2022
CLARA CITY WWTPClara City0.46 MGD (million gallons per day)2022
BREEZY POINT WWTPPequot Lakes0.46 MGD (million gallons per day)2022
PARK RAPIDS WWTPPark Rapids0.46 MGD (million gallons per day)2022
Hermann Industrial Tract LagoonHermann0.46 MGD (million gallons per day)2022
BCRSD Rocky Fork WWTPColumbia0.46 MGD (million gallons per day)2022
AURORA WWTPAurora0.46 MGD (million gallons per day)2022
Salem County - DuPont STP/CSDeepwater0.46 MGD (million gallons per day)2022
OLUSTEE WWTOlustee0.46 MGD (million gallons per day)2022
HOBART PWA WWTHobart0.46 MGD (million gallons per day)2022
PERKINS WWTPerkins0.46 MGD (million gallons per day)2022
FAIRVIEW STPDickson0.46 MGD (million gallons per day)2022
South Plant - GiddingsGiddings0.46 MGD (million gallons per day)2022
Sour Lake WWTPSour Lake0.46 MGD (million gallons per day)2022
Kallus Street Plant WWTPSchulenburg0.46 MGD (million gallons per day)2022
Otis Goldman WWTPFalfurrias0.46 MGD (million gallons per day)2022
KINGSTON STPKingston0.46 MGD (million gallons per day)2022
MANCHESTER STPManchester0.46 MGD (million gallons per day)2022
ELEANOR WWTPEleanor0.46 MGD (million gallons per day)2022
Bloomfield VillageLake Geneva0.46 MGD (million gallons per day)2022
NEKOOSA WWTPNekoosa0.46 MGD (million gallons per day)2022
NEW GLARUS STPNew Glarus0.46 MGD (million gallons per day)2022
WATERLOO WWTPWaterloo0.46 MGD (million gallons per day)2022
HILLSBORO WWTPHillsboro0.458 MGD (million gallons per day)2022
WANAMINGO WWTPWanamingo0.458 MGD (million gallons per day)2022
Doniphan Municipal WWTFDoniphan0.456 MGD (million gallons per day)2022
Bethel LagoonBethel0.455 MGD (million gallons per day)2022
MID-CAMERON AUTH - EMPORIUM STPEmporium0.455 MGD (million gallons per day)2022
BLUEGRASS WWTPBlue Grass0.454 MGD (million gallons per day)2022
MORNING SUN STLMorning Sun0.452 MGD (million gallons per day)2022
ZIMMERMAN WWTPZimmerman0.452 MGD (million gallons per day)2022
TONKAWA MA WWTTonkawa0.452 MGD (million gallons per day)2022
Glencoe LagoonGadsden0.45 MGD (million gallons per day)2022
GROVE HILL JAMES CREEK WWTPGrove Hill0.45 MGD (million gallons per day)2022
LINDEN HCR LAGOONLinden0.45 MGD (million gallons per day)2022
Quartzsite WWTPQuartzsite0.45 MGD (million gallons per day)2022
North Crossett WWTPCrossett0.45 MGD (million gallons per day)2022
Mansfield WWTPMansfield0.45 MGD (million gallons per day)2022
Cave City WWTPCave City0.45 MGD (million gallons per day)2022
MURPHYS WWTFMurphys0.45 MGD (million gallons per day)2022
HOUSTON CREEK WWTFCrestline0.45 MGD (million gallons per day)2022
Rancho Santa Fe WWTFRancho Santa Fe0.45 MGD (million gallons per day)2022
SOUTH DURANGO SDDurango0.45 MGD (million gallons per day)2022
WINTER PARK WSDWinter Park0.45 MGD (million gallons per day)2022
Paonia, Town ofPaonia0.45 MGD (million gallons per day)2022
Century WWTFCentury0.45 MGD (million gallons per day)2022
WILLISTON WWTFWilliston0.45 MGD (million gallons per day)2022
Emerson WPCPEmerson0.45 MGD (million gallons per day)2022
Union Point WPCPUnion Point0.45 MGD (million gallons per day)2022
HOMEDALE STPHomedale0.45 MGD (million gallons per day)2022
BONNERS FERRY S/T PLANTBonners Ferry0.45 MGD (million gallons per day)2022
MARSHALL STPMarshall0.45 MGD (million gallons per day)2022
HAMILTON STPHamilton0.45 MGD (million gallons per day)2022
SOUTH WHITLEY WWTPSouth Whitley0.45 MGD (million gallons per day)2022
ODON WWTPOdon0.45 MGD (million gallons per day)2022
MARKLE WWTPMarkle0.45 MGD (million gallons per day)2022
Hamilton Lake CD WWTPHamilton0.45 MGD (million gallons per day)2022
MILAN WWTPMilan0.45 MGD (million gallons per day)2022
MAXWELL WWTPMaxwell0.45 MGD (million gallons per day)2022
WELLMAN WWTPWellman0.45 MGD (million gallons per day)2022
OGDEN WWTPOgden0.45 MGD (million gallons per day)2022
NORTON WWTPNorton0.45 MGD (million gallons per day)2022
ALBANY WWTPAlbany0.45 MGD (million gallons per day)2022
BOYCE SEWERAGE FACILITYBoyce0.45 MGD (million gallons per day)2022
GREENWOOD STPGreenwood0.45 MGD (million gallons per day)2022
WILTON W P C FWilton0.45 MGD (million gallons per day)2022
Mystic Harbour WWTPBerlin0.45 MGD (million gallons per day)2022
Prince Frederick WWTP IBarstow0.45 MGD (million gallons per day)2022
Cohasset Sewerage Collection System and WWTFCohasset0.45 MGD (million gallons per day)2022
Merrimac Sewerage Collection System and WWTFMerrimac0.45 MGD (million gallons per day)2022
Charlton Sewerage Collection System and WWTFCharlton0.45 MGD (million gallons per day)2022
WHITE PIGEON STPWhite Pigeon0.45 MGD (million gallons per day)2022
Kahoka WWTPKahoka0.45 MGD (million gallons per day)2022
Warsaw WWTPWarsaw0.45 MGD (million gallons per day)2022
THREE FORKS STPThree Forks0.45 MGD (million gallons per day)2022
CENTRAL CITY WWTPCentral City0.45 MGD (million gallons per day)2022
ONEILL WWTPOneill0.45 MGD (million gallons per day)2022
Colebrook WWTFColebrook0.45 MGD (million gallons per day)2022
Montgomery Township Pike Brook CS/STPBelle Mead0.45 MGD (million gallons per day)2022
Placitas CDP (Sandoval County)Placitas0.45 MGD (million gallons per day)2022
Northport (V) WWTP & SewersNorthport0.45 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.