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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
Edna WWTPEdna1 MGD (million gallons per day)2022
Newport MUD WWTPCrosby1 MGD (million gallons per day)2022
Gatesville WWTPGatesville1 MGD (million gallons per day)2022
Iowa Park WWTPIowa Park1 MGD (million gallons per day)2022
White Oak WWTPWhite Oak1 MGD (million gallons per day)2022
North Second Street WWTPRichmond1 MGD (million gallons per day)2022
Horsepen Gully WWTPHouston1 MGD (million gallons per day)2022
Mayde Creek WWTPKaty1 MGD (million gallons per day)2022
Northview Park WWTPHouston1 MGD (million gallons per day)2022
Emerald Forest WWTPHouston1 MGD (million gallons per day)2022
Oakwood Glen WWTPHouston1 MGD (million gallons per day)2022
Old River WWTPChannelview1 MGD (million gallons per day)2022
Enchanted Oaks WWTPHouston1 MGD (million gallons per day)2022
Kenewick WWTPHumble1 MGD (million gallons per day)2022
Northchase WWTPHouston1 MGD (million gallons per day)2022
North WWTP - LulingLuling1 MGD (million gallons per day)2022
Graytown Road WWTPSan Antonio1 MGD (million gallons per day)2022
ROOSEVELTRoosevelt1 MGD (million gallons per day)2022
JORDANELLE SSDHeber City1 MGD (million gallons per day)2022
Milton WWTFMilton1 MGD (million gallons per day)2022
Northfield WWTFNorthfield1 MGD (million gallons per day)2022
Stowe WWTFStowe1 MGD (million gallons per day)2022
LEBANON WWTP & Coll. SystemLebanon1 MGD (million gallons per day)2022
CHILHOWIE STP &COLL.SYS.Chilhowie1 MGD (million gallons per day)2022
DOSWELL WWTPHanover1 MGD (million gallons per day)2022
Cascadia Water Treatment PlantBonney Lake1 MGD (million gallons per day)2022
Buckley WWTFBuckley1 MGD (million gallons per day)2022
WINLOCK STPWinlock1 MGD (million gallons per day)2022
Airway Heights WWTPAirway Heights1 MGD (million gallons per day)2022
BERK CO PSSD - NORTH END WWTPMartinsburg1 MGD (million gallons per day)2022
LOGAN CO PSD WWTPPeach Creek1 MGD (million gallons per day)2022
WINFIELD WWTPWinfield1 MGD (million gallons per day)2022
ALGOMA WWTPAlgoma1 MGD (million gallons per day)2022
BELOIT, Town of - STPBeloit1 MGD (million gallons per day)2022
LANDER LAGOONLander1 MGD (million gallons per day)2022
Silver Springs ShoresOcala0.998 MGD (million gallons per day)2022
Craig WWTPCraig0.997 MGD (million gallons per day)2022
Presidio STP #2Presidio0.997 MGD (million gallons per day)2022
GIRARD BORO STPGirard0.996 MGD (million gallons per day)2022
MONTEVALLO WWTPMontevallo0.995 MGD (million gallons per day)2022
ALICEVILLE WEST LAGOONAliceville0.995 MGD (million gallons per day)2022
Odenville-St. Clair Correctional FacilitySpringville0.995 MGD (million gallons per day)2022
Idaho Springs, Town ofIdaho Springs0.995 MGD (million gallons per day)2022
Carbondale , Town ofCarbondale0.995 MGD (million gallons per day)2022
LAKE LURE WWTPLake Lure0.995 MGD (million gallons per day)2022
Jefferson WWTP & Sewer SystemJefferson0.995 MGD (million gallons per day)2022
Westway UD WWTPHouston0.995 MGD (million gallons per day)2022
HANCEVILLE WWTPHanceville0.99 MGD (million gallons per day)2022
WOODLAND PARK NORTH WWTPWoodland Park0.99 MGD (million gallons per day)2022
EVERGREEN WWTPEvergreen0.99 MGD (million gallons per day)2022
Del Norte, Town ofDel Norte0.99 MGD (million gallons per day)2022
Meeker SDMeeker0.99 MGD (million gallons per day)2022
Groveland- Sampey Road WWTFGroveland0.99 MGD (million gallons per day)2022
MCCORDSVILLE WWTPMc Cordsville0.99 MGD (million gallons per day)2022
MIDDLEBURY WWTPMiddlebury0.99 MGD (million gallons per day)2022
MADRID WWTPMadrid0.99 MGD (million gallons per day)2022
SULLY STLSully0.99 MGD (million gallons per day)2022
PAINTSVILLE STPPaintsville0.99 MGD (million gallons per day)2022
GRAND MARAIS WWTPGrand Marais0.99 MGD (million gallons per day)2022
CRYSTAL SPRINGS POTWCrystal Springs0.99 MGD (million gallons per day)2022
QUITMAN POTWQuitman0.99 MGD (million gallons per day)2022
Storey County Wastewater TRIGID WWTFSparks0.99 MGD (million gallons per day)2022
Blanchester WWTP & Sewer SystemBlanchester0.99 MGD (million gallons per day)2022
CENTER TWP SA - ELKHORN RUN STPMonaca0.99 MGD (million gallons per day)2022
Cotulla WWTPCotulla0.99 MGD (million gallons per day)2022
Green Trails WWTPHouston0.99 MGD (million gallons per day)2022
Yoakum WWTPYoakum0.99 MGD (million gallons per day)2022
SALTVILLE STPSaltville0.99 MGD (million gallons per day)2022
MANCHESTER WWTPManchester0.986 MGD (million gallons per day)2022
GIBSON WWTPGibson0.986 MGD (million gallons per day)2022
BENSON WWTPBenson0.985 MGD (million gallons per day)2022
DWIGHT STPDwight0.983 MGD (million gallons per day)2022
SANBORN WWTPSanborn0.983 MGD (million gallons per day)2022
DAUPHIN ISLAND WWTPDauphin Island0.98 MGD (million gallons per day)2022
Williams WWTFWilliams0.98 MGD (million gallons per day)2022
Greenbrier WWTPGreenbrier0.98 MGD (million gallons per day)2022
Booneville WWTPBooneville0.98 MGD (million gallons per day)2022
Dardanelle WWTPDardanelle0.98 MGD (million gallons per day)2022
Marin Co. SD #5 WWTFBelvedere Tiburon0.98 MGD (million gallons per day)2022
Niwot Sanitation DistrictNiwot0.98 MGD (million gallons per day)2022
LEON WWTPLeon0.98 MGD (million gallons per day)2022
BLUE EARTH WWTPBlue Earth0.98 MGD (million gallons per day)2022
Alfred (V) WWTPAlfred0.98 MGD (million gallons per day)2022
DUTCHMAN CREEK (MOCKSVILLE) WWTPMocksville0.98 MGD (million gallons per day)2022
Oneida WWTPOneida0.98 MGD (million gallons per day)2022
Sanger WWTPSanger0.98 MGD (million gallons per day)2022
Sweeny WWTPSweeny0.98 MGD (million gallons per day)2022
Fort Bend Co MUD #25 WWTPHouston0.98 MGD (million gallons per day)2022
Horsepen Creek WWTPHouston0.98 MGD (million gallons per day)2022
LAKE MILLS WWTPLake Mills0.98 MGD (million gallons per day)2022
NEW RICHMOND STPNew Richmond0.98 MGD (million gallons per day)2022
Atkins - North WWTPAtkins0.975 MGD (million gallons per day)2022
TIFFIN WWTPTiffin0.975 MGD (million gallons per day)2022
MOSHEIM WWTPMosheim0.975 MGD (million gallons per day)2022
DODGE CENTER WWTPDodge Center0.973 MGD (million gallons per day)2022
MASCOUTAH, CITY OFMascoutah0.97 MGD (million gallons per day)2022
BICKNELL WWTPBicknell0.97 MGD (million gallons per day)2022
RIPLEY POTWRipley0.97 MGD (million gallons per day)2022
Kiryas Joel (V) Sewers & WWTPMonroe0.97 MGD (million gallons per day)2022
Cuba (V) WWTP & Collection SystemCuba0.97 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.