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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
Byron WWTPByron1.4 MGD (million gallons per day)2022
CROOKSTON WWTPCrookston1.4 MGD (million gallons per day)2022
EAST GRAND FORKS WWTPEast Grand Forks1.4 MGD (million gallons per day)2022
De Soto WWTPDe Soto1.4 MGD (million gallons per day)2022
Kennett WWTPKennett1.4 MGD (million gallons per day)2022
Florham Park Borough SA - CS/STPFlorham Park1.4 MGD (million gallons per day)2022
Salem City - CS/STPSalem1.4 MGD (million gallons per day)2022
Newton Town CS - STPNewton1.4 MGD (million gallons per day)2022
Washington Borough (Warren) - CS/STPWashington1.4 MGD (million gallons per day)2022
Los Alamos County Wastewater Treatment FacilityLos Alamos1.4 MGD (million gallons per day)2022
New Paltz (V) STP and SewersNew Paltz1.4 MGD (million gallons per day)2022
Ellicottville (V) WWTPEllicottville1.4 MGD (million gallons per day)2022
Attica (V) WWTPAttica1.4 MGD (million gallons per day)2022
MURPHY WWTPMurphy1.4 MGD (million gallons per day)2022
Delaware Co Lower Scioto WRFDelaware1.4 MGD (million gallons per day)2022
East Palestine WWTP & Sewer SystemEast Palestine1.4 MGD (million gallons per day)2022
Millersburg WWTP & Sewer SystemMillersburg1.4 MGD (million gallons per day)2022
West Carrollton WWTP & Sewer SystemCarrollton1.4 MGD (million gallons per day)2022
SWEET HOME STPSweet Home1.4 MGD (million gallons per day)2022
ROBESONIA-WERNERSVILLE STPWernersville1.4 MGD (million gallons per day)2022
MYERSTOWN BOROMyerstown1.4 MGD (million gallons per day)2022
FRACKVILLE AREA MUN AUTHFrackville1.4 MGD (million gallons per day)2022
NARRAGANSETT SCARBOROUGHNarragansett1.4 MGD (million gallons per day)2022
Bolivar STPBolivar1.4 MGD (million gallons per day)2022
West Agua WWTPSullivan City1.4 MGD (million gallons per day)2022
PERRYTON STPPerryton1.4 MGD (million gallons per day)2022
Western La Joya WWTPLa Joya1.4 MGD (million gallons per day)2022
La Joya WSC - Havana WWTPLa Joya1.4 MGD (million gallons per day)2022
Trophy Club WWTPRoanoke1.4 MGD (million gallons per day)2022
Gladewater WWTPGladewater1.4 MGD (million gallons per day)2022
JASPER STREET WWTPBastrop1.4 MGD (million gallons per day)2022
Harris Co MUD #196 WWTPHouston1.4 MGD (million gallons per day)2022
Bellows Falls WWTFBellows Falls1.4 MGD (million gallons per day)2022
Winooski WWTFWinooski1.4 MGD (million gallons per day)2022
TORRINGTON LAGOONSTorrington1.4 MGD (million gallons per day)2022
FREMONT STPFremont1.39 MGD (million gallons per day)2022
ST CLAIR STPSaint Clair1.39 MGD (million gallons per day)2022
BIG RAPIDS WWTPBig Rapids1.39 MGD (million gallons per day)2022
MIDLAND BORO STPMidland1.39 MGD (million gallons per day)2022
THOMASTON, TOWN OFThomaston1.38 MGD (million gallons per day)2022
MAHANOY CITY STPMahanoy City1.38 MGD (million gallons per day)2022
Rio Grande City WWTPRio Grande City1.38 MGD (million gallons per day)2022
Rio Grande City WWTP #2Rio Grande City1.38 MGD (million gallons per day)2022
HAMPTON WWTPHampton1.374 MGD (million gallons per day)2022
Dumas WWTPDumas1.37 MGD (million gallons per day)2022
MCKINLEYVILLE WWTFMckinleyville1.37 MGD (million gallons per day)2022
BONNER SPGS WWTPBonner Springs1.37 MGD (million gallons per day)2022
LOUISBURG WWTPLouisburg1.37 MGD (million gallons per day)2022
Andrews WWTPAndrews1.37 MGD (million gallons per day)2022
Athens - West WWTPAthens1.367 MGD (million gallons per day)2022
Saugerties (V) Sewers & STPSaugerties1.36 MGD (million gallons per day)2022
MT PLEASANT BORO STPMount Pleasant1.36 MGD (million gallons per day)2022
Hillsboro WWTPHillsboro1.36 MGD (million gallons per day)2022
THOMPSON, TOWN OFThompson1.35 MGD (million gallons per day)2022
TROY STPTroy1.35 MGD (million gallons per day)2022
MANHATTAN STPManhattan1.35 MGD (million gallons per day)2022
SCOTTSBURG WWTPScottsburg1.35 MGD (million gallons per day)2022
CONCORDIA WWTPConcordia1.35 MGD (million gallons per day)2022
Pepperell Sewerage Collection System and WWTFPepperell1.35 MGD (million gallons per day)2022
HOLLY STPHolly1.35 MGD (million gallons per day)2022
Mt. Vernon WWTPMount Vernon1.35 MGD (million gallons per day)2022
Allenstown Regional WWTFSuncook1.35 MGD (million gallons per day)2022
Highland Falls (V) Sewers & STPHighland Falls1.35 MGD (million gallons per day)2022
GUTHRIE PWA WWTGuthrie1.35 MGD (million gallons per day)2022
Bridgestone WWTPSpring1.35 MGD (million gallons per day)2022
Greatwood WWTPSugar Land1.35 MGD (million gallons per day)2022
TOPPENISH TREATMENTToppenish1.35 MGD (million gallons per day)2022
COALINGA WWTFCoalinga1.34 MGD (million gallons per day)2022
Ottawa Co Portage/Catawba WWTPPort Clinton1.34 MGD (million gallons per day)2022
JEANERETTE STPJeanerette1.33 MGD (million gallons per day)2022
PEMBROKE WWTPPembroke1.33 MGD (million gallons per day)2022
Eastbridge STPKnoxville1.33 MGD (million gallons per day)2022
Nassau Bay WWTPHouston1.33 MGD (million gallons per day)2022
REDWOOD FALLS WWTPRedwood Falls1.321 MGD (million gallons per day)2022
Lavonia WPCPLavonia1.32 MGD (million gallons per day)2022
HOOPESTON STPHoopeston1.32 MGD (million gallons per day)2022
Chatham Sewerage Collection System and WWTFChatham1.32 MGD (million gallons per day)2022
GREENVILLE STPGreenville1.31 MGD (million gallons per day)2022
KELLY TWP MUN AUTHLewisburg1.31 MGD (million gallons per day)2022
PINE CREEK MA STPJersey Shore1.31 MGD (million gallons per day)2022
Fort Stockton WWTPFort Stockton1.31 MGD (million gallons per day)2022
EPHRAIMEphraim1.31 MGD (million gallons per day)2022
WALCOTT WASTEWATERWalcott1.308 MGD (million gallons per day)2022
Kenai WastewaterKenai1.3 MGD (million gallons per day)2022
PCRWRD Corona de Tucson WWTFSahuarita1.3 MGD (million gallons per day)2022
SHASTA LAKE WWTFShasta Lake1.3 MGD (million gallons per day)2022
Railroad Canyon WWTPLake Elsinore1.3 MGD (million gallons per day)2022
Ralph W. Chapman WRFSpring Valley1.3 MGD (million gallons per day)2022
WILLOW CREEK WWTFGrand Lake1.3 MGD (million gallons per day)2022
Woodmen Hills Metropolitain DistricPeyton1.3 MGD (million gallons per day)2022
STONINGTON PAWCATUCK WPCFPawcatuck1.3 MGD (million gallons per day)2022
GEORGETOWN STPGeorgetown1.3 MGD (million gallons per day)2022
MACCLENNY WWTFMacclenny1.3 MGD (million gallons per day)2022
Leesburg LagoonLeesburg1.3 MGD (million gallons per day)2022
Quitman WPCPQuitman1.3 MGD (million gallons per day)2022
CREST HILL STW - WESTCrest Hill1.3 MGD (million gallons per day)2022
VANDALIA STPVandalia1.3 MGD (million gallons per day)2022
MAQUOKETA WWTPMaquoketa1.3 MGD (million gallons per day)2022
DESOTO WWTPDe Soto1.3 MGD (million gallons per day)2022
HESSTON WWTPHesston1.3 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.