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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
City of Burley Industrial ParkBurley2.4 MGD (million gallons per day)2022
DuQuoin STPDu Quoin2.4 MGD (million gallons per day)2022
MENDOTA STPMendota2.4 MGD (million gallons per day)2022
PLYMOUTH WWTPPlymouth2.4 MGD (million gallons per day)2022
ELDRIDGE WWTPEldridge2.4 MGD (million gallons per day)2022
SN CO SHERWOOD REG WWTPTopeka2.4 MGD (million gallons per day)2022
INDEPENDENCE WWTPIndependence2.4 MGD (million gallons per day)2022
RUSSELLVILLERussellville2.4 MGD (million gallons per day)2022
KITTERY WPCFKittery2.4 MGD (million gallons per day)2022
Grafton Sewerage Collection System and WWTFGrafton2.4 MGD (million gallons per day)2022
EAST TAWAS WWTPEast Tawas2.4 MGD (million gallons per day)2022
Allendale Charter TownshipAllendale2.4 MGD (million gallons per day)2022
PAW PAW STPPaw Paw2.4 MGD (million gallons per day)2022
Harrisonville WWTPHarrisonville2.4 MGD (million gallons per day)2022
Farmington WWTP WestFarmington2.4 MGD (million gallons per day)2022
Somersworth WWTFSomersworth2.4 MGD (million gallons per day)2022
WILLIAMSTON WWTPWilliamston2.4 MGD (million gallons per day)2022
Bellevue WWTP & Sewer SystemBellevue2.4 MGD (million gallons per day)2022
Kenton WWTP & Sewer SystemKenton2.4 MGD (million gallons per day)2022
COOS BAY STP NO. 1Coos Bay2.4 MGD (million gallons per day)2022
Silverlake WWTPPearland2.4 MGD (million gallons per day)2022
EAGLE MOUNTAINEagle Mountain2.4 MGD (million gallons per day)2022
Springfield WWTFSpringfield2.4 MGD (million gallons per day)2022
FARMVILLE WWTPFarmville2.4 MGD (million gallons per day)2022
MORTON STP 2Morton2.39 MGD (million gallons per day)2022
BRIDGEPORT TWP STPBridgeport2.39 MGD (million gallons per day)2022
CHEROKEE WWTPCherokee2.387 MGD (million gallons per day)2022
BLOOMINGTON STP NORTHBloomington2.38 MGD (million gallons per day)2022
GIG HARBOR STPGig Harbor2.38 MGD (million gallons per day)2022
Donax WRFSanibel2.375 MGD (million gallons per day)2022
Ridaught Landing WWTPMiddleburg2.37 MGD (million gallons per day)2022
SELLERSBURG WWTPSellersburg2.37 MGD (million gallons per day)2022
Penacook WWTFConcord2.37 MGD (million gallons per day)2022
Medford Township - CS/STPMedford2.363 MGD (million gallons per day)2022
Morro Bay Cayucos WWTFMorro Bay2.36 MGD (million gallons per day)2022
MONTICELLO WWTPMonticello2.36 MGD (million gallons per day)2022
Town of Discovery Bay (Plant 2)Discovery Bay2.35 MGD (million gallons per day)2022
Town of Discovery Bay (Plant 1)Discovery Bay2.35 MGD (million gallons per day)2022
PORTLAND WWTPPortland2.35 MGD (million gallons per day)2022
CHANUTE WWTPChanute2.35 MGD (million gallons per day)2022
Buffalo Creek WWTPRockwall2.35 MGD (million gallons per day)2022
Mineral Wells - Pollard Creek WWTPMineral Wells2.35 MGD (million gallons per day)2022
Pollard Creek WWTPMineral Wells2.35 MGD (million gallons per day)2022
Orange - Hwy 87 WWTPOrange2.35 MGD (million gallons per day)2022
Highlands WWTPHighlands2.35 MGD (million gallons per day)2022
VC/Southwest Regional WWTFDebary2.341 MGD (million gallons per day)2022
Glenwood Springs Regional WWTPGlenwood Springs2.34 MGD (million gallons per day)2022
Palmer Sewerage Collection System and WPCFPalmer2.34 MGD (million gallons per day)2022
Columbiana WWTP & Sewer SystemColumbiana2.34 MGD (million gallons per day)2022
MOUNDSVILLE WWTPMoundsville2.34 MGD (million gallons per day)2022
Fruita, City ofFruita2.33 MGD (million gallons per day)2022
WAVERLY WWTPWaverly2.33 MGD (million gallons per day)2022
MILLINOCKET WWTFMillinocket2.33 MGD (million gallons per day)2022
WEST FARGO WASTEWATERWest Fargo2.327 MGD (million gallons per day)2022
BIDDEFORD WWTPBiddeford2.31 MGD (million gallons per day)2022
PRESQUE ISLE WWTFPresque Isle2.31 MGD (million gallons per day)2022
SCOTTS BLUFF WWTPScottsbluff2.31 MGD (million gallons per day)2022
SAND SPRINGS (MAIN) WWTSand Springs2.31 MGD (million gallons per day)2022
MILLBROOK WWTPMillbrook2.3 MGD (million gallons per day)2022
Nashville WWTPNashville2.3 MGD (million gallons per day)2022
Arcata WWTFArcata2.3 MGD (million gallons per day)2022
L. ARROWHEAD WWTFLake Arrowhead2.3 MGD (million gallons per day)2022
WHEAT RIDGE STPWheat Ridge2.3 MGD (million gallons per day)2022
Key LargoKey Largo2.3 MGD (million gallons per day)2022
EAGLE SEWER DistrictEagle2.3 MGD (million gallons per day)2022
EAST DUNDEE STPDundee2.3 MGD (million gallons per day)2022
MWRDGC, LEMONT WRPLemont2.3 MGD (million gallons per day)2022
ELLETTSVILLE WWTPEllettsville2.3 MGD (million gallons per day)2022
Hahnville Wastewater Treatment PlantHahnville2.3 MGD (million gallons per day)2022
LAPEER STPLapeer2.3 MGD (million gallons per day)2022
HAVRE WWTFHavre2.3 MGD (million gallons per day)2022
Hanover WWTFHanover2.3 MGD (million gallons per day)2022
Evesham Township MUA - Elmwood STP/CSMarlton2.3 MGD (million gallons per day)2022
Albion (V) Jt.Mun-Ind. WWTPAlbion2.3 MGD (million gallons per day)2022
Harrison WWTP & Sewer SystemHarrison2.3 MGD (million gallons per day)2022
Pickaway Correctional InstituteOrient2.3 MGD (million gallons per day)2022
ASHLAND STPAshland2.3 MGD (million gallons per day)2022
NEWPORT STPNewport2.3 MGD (million gallons per day)2022
Odessa South Industrial WWTPOdessa2.3 MGD (million gallons per day)2022
MAGNA WIDMagna2.3 MGD (million gallons per day)2022
GRAFTON WWTPGrafton2.3 MGD (million gallons per day)2022
WASHINGTON STP 2Washington2.29 MGD (million gallons per day)2022
TOMAH WWTPTomah2.282 MGD (million gallons per day)2022
BROWNSVILLE LAGOONBrownsville2.28 MGD (million gallons per day)2022
LOCKPORT, BONNIE BRAE STP (NORTH BASIN)Lockport2.26 MGD (million gallons per day)2022
Amesbury Sewerage Collection System and WWTFAmesbury2.26 MGD (million gallons per day)2022
Belton WWTPBelton2.26 MGD (million gallons per day)2022
CLANTON WALNUT CREEK WWTPClanton2.25 MGD (million gallons per day)2022
UNION SPRINGS WWTPUnion Springs2.25 MGD (million gallons per day)2022
Peoria Jomax WRFPeoria2.25 MGD (million gallons per day)2022
WINDSOR WWTFWindsor2.25 MGD (million gallons per day)2022
FT MORGAN WWTPFort Morgan2.25 MGD (million gallons per day)2022
BEAVERBROOK WPCFMilford2.25 MGD (million gallons per day)2022
OLDSMAR WRFOldsmar2.25 MGD (million gallons per day)2022
Lowndes County South Regional WPCPLake Park2.25 MGD (million gallons per day)2022
Griffin Shoal Creek WPCPGriffin2.25 MGD (million gallons per day)2022
JESUP WWTPJesup2.25 MGD (million gallons per day)2022
GROSSE ISLE TOWNSHIP WWTPGrosse Ile2.25 MGD (million gallons per day)2022
LBVSD Middle Big Creek WWTPPleasant Hill2.25 MGD (million gallons per day)2022
WILSONVILLE STPWilsonville2.25 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.