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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
Jackson Center WWTP & Sewer SystemJackson Center0.37 MGD (million gallons per day)2022
Milan WWTP & Sewer SystemMilan0.37 MGD (million gallons per day)2022
BAY CITY STPBay City0.37 MGD (million gallons per day)2022
North Regional WWTPLufkin0.37 MGD (million gallons per day)2022
Enchanted Valley (Hidalgo Co MUD)Mission0.37 MGD (million gallons per day)2022
Cooper WWTPCooper0.37 MGD (million gallons per day)2022
SNOQUALMIE PASS UD TREATMENTSnoqualmie Pass0.37 MGD (million gallons per day)2022
BELINGTON WWTPBelington0.37 MGD (million gallons per day)2022
WARROAD WWTPWarroad0.369 MGD (million gallons per day)2022
Woodbine WPCPWoodbine0.368 MGD (million gallons per day)2022
SHERIDAN S.D. WWTPSheridan0.368 MGD (million gallons per day)2022
MIDDLETOWN WWTPMiddletown0.367 MGD (million gallons per day)2022
Groveton WWTFNorthumberland0.367 MGD (million gallons per day)2022
CARLTON STPCarlton0.367 MGD (million gallons per day)2022
LADD SEWAGE TREATMENT PLTLadd0.365 MGD (million gallons per day)2022
MALVERN STLMalvern0.365 MGD (million gallons per day)2022
North Bay WWTPAllyn0.365 MGD (million gallons per day)2022
CHETEK STPChetek0.365 MGD (million gallons per day)2022
ELGIN WWTPElgin0.364 MGD (million gallons per day)2022
DAWSON SPRINGSDawson Springs0.364 MGD (million gallons per day)2022
LESTER PRAIRIE WWTPLester Prairie0.364 MGD (million gallons per day)2022
LUCK STPLuck0.364 MGD (million gallons per day)2022
LaGrange WWTP & Sewer SystemLagrange0.363 MGD (million gallons per day)2022
CLEVELAND WWTCleveland0.363 MGD (million gallons per day)2022
Sugarloaf WTD WWTPDiamond City0.362 MGD (million gallons per day)2022
MONTALVO WWTFVentura0.36 MGD (million gallons per day)2022
MOJAVE WWTFMojave0.36 MGD (million gallons per day)2022
Eagle WWTFVail0.36 MGD (million gallons per day)2022
OURAY WWTPOuray0.36 MGD (million gallons per day)2022
DACONO, CITY OFDacono0.36 MGD (million gallons per day)2022
Wauchula Hills WWTFBowling Green0.36 MGD (million gallons per day)2022
MAROA STPMaroa0.36 MGD (million gallons per day)2022
WHITE HALL STWWhite Hall0.36 MGD (million gallons per day)2022
MOUNT CARROLL STPMount Carroll0.36 MGD (million gallons per day)2022
NOKOMIS STPNokomis0.36 MGD (million gallons per day)2022
FARMER CITY STPFarmer City0.36 MGD (million gallons per day)2022
New Paris CDNew Paris0.36 MGD (million gallons per day)2022
EATON STPEaton0.36 MGD (million gallons per day)2022
CHENEY WWTPCheney0.36 MGD (million gallons per day)2022
ARNAUDVILLE WWTPArnaudville0.36 MGD (million gallons per day)2022
COUSHATTA WWTPCoushatta0.36 MGD (million gallons per day)2022
GRAYLING STPGrayling0.36 MGD (million gallons per day)2022
Canton WWTPCanton0.36 MGD (million gallons per day)2022
Richland WWTPRichland0.36 MGD (million gallons per day)2022
Dixon WWTPDixon0.36 MGD (million gallons per day)2022
Ringwood Borough - CS/STPRingwood0.36 MGD (million gallons per day)2022
Guilderland (T) NE Ind. Park STPGuilderland0.36 MGD (million gallons per day)2022
Middleport WWTP & Collection SystemMiddleport0.36 MGD (million gallons per day)2022
Ansonia WWTP & SewersAnsonia0.36 MGD (million gallons per day)2022
EUFAULA PWA WWTEufaula0.36 MGD (million gallons per day)2022
ELGIN STPElgin0.36 MGD (million gallons per day)2022
WALDPORT STPWaldport0.36 MGD (million gallons per day)2022
RUTHERFORD WWTPRutherford0.36 MGD (million gallons per day)2022
Unitec Center WWTPLaredo0.36 MGD (million gallons per day)2022
BOYDTON STPBoydton0.36 MGD (million gallons per day)2022
Maine, Village ofWausau0.36 MGD (million gallons per day)2022
MARKESAN WWTPMarkesan0.36 MGD (million gallons per day)2022
DURANT WWTPDurant0.358 MGD (million gallons per day)2022
ELLSWORTH WWTPEllsworth0.358 MGD (million gallons per day)2022
KENYON WWTPKenyon0.357 MGD (million gallons per day)2022
BODEGA BAY WWTFBodega0.355 MGD (million gallons per day)2022
Willacoochee WPCPWillacoochee0.355 MGD (million gallons per day)2022
HOLSTEIN WWTPHolstein0.355 MGD (million gallons per day)2022
NORWAY S. T. P.Norway0.355 MGD (million gallons per day)2022
Seymour WWTPSeymour0.355 MGD (million gallons per day)2022
NASHWAUK WWTPNashwauk0.353 MGD (million gallons per day)2022
MINERAL POINT STPMineral Point0.353 MGD (million gallons per day)2022
Jennings Northwest Regional UtilityLawrenceburg0.352 MGD (million gallons per day)2022
Marathon Water & Sewer DPT WWTPMarathon0.352 MGD (million gallons per day)2022
ALICEVILLE EAST LAGOONAliceville0.351 MGD (million gallons per day)2022
Rochelle Northwest WPCPRochelle0.351 MGD (million gallons per day)2022
ARDMORE WWTPArdmore0.35 MGD (million gallons per day)2022
ASHFORD WWTPAshford0.35 MGD (million gallons per day)2022
Lockhart Sewer Collection SystemLockhart0.35 MGD (million gallons per day)2022
Lockhart/Florala WWTPLockhart0.35 MGD (million gallons per day)2022
GOOD HOPE WWTPCullman0.35 MGD (million gallons per day)2022
MONROEVILLE HUDSON BRANCH WWTPMonroeville0.35 MGD (million gallons per day)2022
Springerville WWTFSpringerville0.35 MGD (million gallons per day)2022
Monette WWTPMonette0.35 MGD (million gallons per day)2022
Salem WWTPSalem0.35 MGD (million gallons per day)2022
Waldo WWTPWaldo0.35 MGD (million gallons per day)2022
RIDGEMARK WWTFHollister0.35 MGD (million gallons per day)2022
WESTWOOD WWTFRancho Cordova0.35 MGD (million gallons per day)2022
HIDDEN VALLEY LAKE WWTFHidden Valley Lake0.35 MGD (million gallons per day)2022
WEST MONTROSE WWTPMontrose0.35 MGD (million gallons per day)2022
PLATTEVILLE STPPlatteville0.35 MGD (million gallons per day)2022
Morrison Creek Metropolitain WSDOak Creek0.35 MGD (million gallons per day)2022
NORFOLK, TOWN OFNorfolk0.35 MGD (million gallons per day)2022
Crescent CityCrescent City0.35 MGD (million gallons per day)2022
Crescent City WWTFCrescent City0.35 MGD (million gallons per day)2022
PAPAIKOU/PAUKAA WWTFPapaikou0.35 MGD (million gallons per day)2022
ASHTON TREATMENT SYSTEMAshton0.35 MGD (million gallons per day)2022
DURAND STPDurand0.35 MGD (million gallons per day)2022
FORREST WWTPForrest0.35 MGD (million gallons per day)2022
VIRGINIA STPVirginia0.35 MGD (million gallons per day)2022
BENLD STPBenld0.35 MGD (million gallons per day)2022
HAGERSTOWN WWTPHagerstown0.35 MGD (million gallons per day)2022
COVINGTON WWTPCovington0.35 MGD (million gallons per day)2022
ANDREWS WWTPAndrews0.35 MGD (million gallons per day)2022
ROANOKE WWTPRoanoke0.35 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.