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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
ACKLEY WWTPAckley0.53 MGD (million gallons per day)2022
HART STPHart0.53 MGD (million gallons per day)2022
DAVID CITY WWTPDavid City0.53 MGD (million gallons per day)2022
City of Carlin WastewaterCarlin0.53 MGD (million gallons per day)2022
Woodsfield WWTP & Sewer SystemWoodsfield0.53 MGD (million gallons per day)2022
NOWATA MA WWTNowata0.53 MGD (million gallons per day)2022
COQUILLE STPCoquille0.53 MGD (million gallons per day)2022
DECATUR STPDecatur0.53 MGD (million gallons per day)2022
SEWANEE WWTPSewanee0.53 MGD (million gallons per day)2022
Farmersville #2Farmersville0.53 MGD (million gallons per day)2022
Ladonia WWTPLadonia0.53 MGD (million gallons per day)2022
WintersWinters0.53 MGD (million gallons per day)2022
LOGAN WWTPLogan0.53 MGD (million gallons per day)2022
PAULLINA STLPaullina0.527 MGD (million gallons per day)2022
Wawarsing (T) Napanoch WWTPNapanoch0.525 MGD (million gallons per day)2022
Lake Pointe WWTPAustin0.525 MGD (million gallons per day)2022
Groesbeck WWTPGroesbeck0.525 MGD (million gallons per day)2022
ST MARYS WWTPSaint Marys0.525 MGD (million gallons per day)2022
Newport WWTFNewport0.524 MGD (million gallons per day)2022
GREENWOOD STPGreenwood0.524 MGD (million gallons per day)2022
Barrow County Barber Creek WPCPStatham0.523 MGD (million gallons per day)2022
BIG TIMBER WWTFBig Timber0.523 MGD (million gallons per day)2022
Reno WWTPParis0.522 MGD (million gallons per day)2022
Lincolnton WPCPLincolnton0.52 MGD (million gallons per day)2022
Villa Rica North Sweetwater WPCPVilla Rica0.52 MGD (million gallons per day)2022
HEBRON WWTPHebron0.52 MGD (million gallons per day)2022
Fleming-NeonNeon0.52 MGD (million gallons per day)2022
WAVERLY STPWaverly0.52 MGD (million gallons per day)2022
Cooperstown (V) Sewers & STPCooperstown0.52 MGD (million gallons per day)2022
PAWHUSKA WWTPawhuska0.52 MGD (million gallons per day)2022
OKEMAH PWA WWTOkemah0.52 MGD (million gallons per day)2022
CAVE JUNCTION STPCave Junction0.52 MGD (million gallons per day)2022
Lost Creek WWTPAustin0.52 MGD (million gallons per day)2022
Channelwood WWTPChannelview0.52 MGD (million gallons per day)2022
King County Vashon WWTPVashon0.52 MGD (million gallons per day)2022
SPENCER WWTPSpencer0.52 MGD (million gallons per day)2022
Lowellville WWTP & Sewer SystemLowellville0.512 MGD (million gallons per day)2022
LIBBY WWTPLibby0.511 MGD (million gallons per day)2022
MCFARLAND WWTFMc Farland0.51 MGD (million gallons per day)2022
ALBION STPAlbion0.51 MGD (million gallons per day)2022
PANORA WWTPPanora0.51 MGD (million gallons per day)2022
ERIE WWTPErie0.51 MGD (million gallons per day)2022
EDMONTON, City ofEdmonton0.51 MGD (million gallons per day)2022
MANCHESTER STPManchester0.51 MGD (million gallons per day)2022
Chaffee WWTPChaffee0.51 MGD (million gallons per day)2022
Henniker WWTFHenniker0.51 MGD (million gallons per day)2022
Stillwater (V) STPStillwater0.51 MGD (million gallons per day)2022
KREBS UA WWTKrebs0.51 MGD (million gallons per day)2022
MERCER BORO STPMercer0.51 MGD (million gallons per day)2022
Edward Farrar Utility District WWTFWaterbury0.51 MGD (million gallons per day)2022
Lakeland WPCPLakeland0.509 MGD (million gallons per day)2022
PRESCOTT WWTPPrescott0.509 MGD (million gallons per day)2022
Young Harris WPCPYoung Harris0.505 MGD (million gallons per day)2022
KAMIAH REGIONAL STPKamiah0.504 MGD (million gallons per day)2022
Hamilton WPCPHamilton0.501 MGD (million gallons per day)2022
Westside WWTPBay Minette0.5 MGD (million gallons per day)2022
NORTH BREWTON LAGOONBrewton0.5 MGD (million gallons per day)2022
CEDAR BLUFF WWTPCedar Bluff0.5 MGD (million gallons per day)2022
South Alabama Utilities-Citronelle WWTPCitronelle0.5 MGD (million gallons per day)2022
HARTFORD LAGOONHartford0.5 MGD (million gallons per day)2022
Harvest Monrovia-Jeff Road WWTPHarvest0.5 MGD (million gallons per day)2022
MARION WWTPMarion0.5 MGD (million gallons per day)2022
OZARK NORTHEAST LAGOONOzark0.5 MGD (million gallons per day)2022
SAMSON LAGOONSamson0.5 MGD (million gallons per day)2022
TALLADEGA BRECON WWTPTalladega0.5 MGD (million gallons per day)2022
TALLADEGA AIRPORT IND. WWTPTalladega0.5 MGD (million gallons per day)2022
ASHVILLE LAGOONAshville0.5 MGD (million gallons per day)2022
HEADLAND JIMMY CARR WWTPHeadland0.5 MGD (million gallons per day)2022
SULLIGENT WWTPSulligent0.5 MGD (million gallons per day)2022
VANCE WWTPVance0.5 MGD (million gallons per day)2022
Mountain Point WWTPKetchikan0.5 MGD (million gallons per day)2022
Wasilla Aerated LagoonWasilla0.5 MGD (million gallons per day)2022
Chino ValleyChino Valley0.5 MGD (million gallons per day)2022
Gila Bend WWTFGila Bend0.5 MGD (million gallons per day)2022
Big Park Improvement DistrictSedona0.5 MGD (million gallons per day)2022
Holiday Island SID WWTPBeaver0.5 MGD (million gallons per day)2022
Gentry WWTPGentry0.5 MGD (million gallons per day)2022
Rector WWTPRector0.5 MGD (million gallons per day)2022
Brookland WWTPBrookland0.5 MGD (million gallons per day)2022
Turrell WWTPTurrell0.5 MGD (million gallons per day)2022
Parkin WWTPParkin0.5 MGD (million gallons per day)2022
Charleston WWTPCharleston0.5 MGD (million gallons per day)2022
Marshall WWTPMarshall0.5 MGD (million gallons per day)2022
Vilonia WWTPVilonia0.5 MGD (million gallons per day)2022
Cotter-Gassville WWTPCotter0.5 MGD (million gallons per day)2022
Des Arc WWTPDes Arc0.5 MGD (million gallons per day)2022
Smackover WWTPSmackover0.5 MGD (million gallons per day)2022
Lincoln WWTPLincoln0.5 MGD (million gallons per day)2022
Horsethief Canyon WRFCorona0.5 MGD (million gallons per day)2022
Waterford, City ofWaterford0.5 MGD (million gallons per day)2022
WEAVERVILLE WWTFWeaverville0.5 MGD (million gallons per day)2022
ST. HELENA WWTFSaint Helena0.5 MGD (million gallons per day)2022
MALIBU WWTFMalibu0.5 MGD (million gallons per day)2022
New Piru WWTFVentura0.5 MGD (million gallons per day)2022
PORTOLA WWTFPortola0.5 MGD (million gallons per day)2022
Williams WWTFWilliams0.5 MGD (million gallons per day)2022
BASS LAKE WWTFBass Lake0.5 MGD (million gallons per day)2022
FIREBAUGH WWTFFirebaugh0.5 MGD (million gallons per day)2022
BEAR VALLEY WWTFArnold0.5 MGD (million gallons per day)2022
WOODBRIDGE WWTFWoodbridge0.5 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.