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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
Dunkirk (C) WWTPDunkirk6 MGD (million gallons per day)2022
LOWER CREEK WWTPLenoir6 MGD (million gallons per day)2022
NORTHEAST WWTP (HICKORY)Hickory6 MGD (million gallons per day)2022
SHELBY WWTPShelby6 MGD (million gallons per day)2022
HAMBY CK WWTP (THOMASVILLE)Thomasville6 MGD (million gallons per day)2022
CROWDERS (Gastonia) CREEKGastonia6 MGD (million gallons per day)2022
WAYNESVILLE WWTPWaynesville6 MGD (million gallons per day)2022
FOURTH CREEK WWTPStatesville6 MGD (million gallons per day)2022
LINCOLNTON WWTPLincolnton6 MGD (million gallons per day)2022
KILLIAN CREEK WWTPStanley6 MGD (million gallons per day)2022
MALLARD CREEK WWTPCharlotte6 MGD (million gallons per day)2022
JACKSONVILLE WWTPJacksonville6 MGD (million gallons per day)2022
NUTBUSH CREEK WWTPHenderson6 MGD (million gallons per day)2022
Defiance WWTP & Sewer SystemDefiance6 MGD (million gallons per day)2022
Delaware Co Olentangy ECCPowell6 MGD (million gallons per day)2022
Fairborn WWTP & Sewer SystemFairborn6 MGD (million gallons per day)2022
Lebanon Regional WWTP & SewersLebanon6 MGD (million gallons per day)2022
Painesville WWTP & Sewer SystemPainesville6 MGD (million gallons per day)2022
Steubenville WWTP & Sewer SystemSteubenville6 MGD (million gallons per day)2022
Struthers WWTP & Sewer SystemStruthers6 MGD (million gallons per day)2022
Washington CH WWTP & SewersWashington Court House6 MGD (million gallons per day)2022
OKC SOUTH CANADIAN WWTOklahoma City6 MGD (million gallons per day)2022
KLAMATH -FALLS SPRING STREETKlamath Falls6 MGD (million gallons per day)2022
MCCANDLESS TWP - PINE CREEK STPGibsonia6 MGD (million gallons per day)2022
WEST GOSHEN STPWest Chester6 MGD (million gallons per day)2022
LOWER LACKAWANNA VLY STPDuryea6 MGD (million gallons per day)2022
LRBSA ARCHBALD STPJermyn6 MGD (million gallons per day)2022
CARLISLE BORO STPCarlisle6 MGD (million gallons per day)2022
OOSTANAULA WWTPAthens6 MGD (million gallons per day)2022
Collierville Northwest STPCollierville6 MGD (million gallons per day)2022
Johnson City Regional STPJohnson City6 MGD (million gallons per day)2022
PIGEON FORGE STPPigeon Forge6 MGD (million gallons per day)2022
EAGLE PASS WWTPEagle Pass6 MGD (million gallons per day)2022
South WWTPKilleen6 MGD (million gallons per day)2022
Paw Paw WWTPDenison6 MGD (million gallons per day)2022
East District WWTP - BaytownBaytown6 MGD (million gallons per day)2022
Deer Park WWTPDeer Park6 MGD (million gallons per day)2022
Seabrook WWTPSeabrook6 MGD (million gallons per day)2022
Atascocita Central WWTPHouston6 MGD (million gallons per day)2022
Woodlands WWTPSpring6 MGD (million gallons per day)2022
Spanish ForkSpanish Fork6 MGD (million gallons per day)2022
BRIGHAM CITYBrigham City6 MGD (million gallons per day)2022
CULPEPER S T PCulpeper6 MGD (million gallons per day)2022
CHRISTIANSBURG WWTPChristiansburg6 MGD (million gallons per day)2022
WAYNESBORO STPWaynesboro6 MGD (million gallons per day)2022
CHEHALIS STPChehalis6 MGD (million gallons per day)2022
CENT. KITSAP REG. STPPoulsbo6 MGD (million gallons per day)2022
SOUTH MILWAUKEE STPSouth Milwaukee6 MGD (million gallons per day)2022
Laramie WWTFLaramie6 MGD (million gallons per day)2022
Jonesboro - West WWTPJonesboro5.95 MGD (million gallons per day)2022
LOWER ALLEN TWP STPNew Cumberland5.95 MGD (million gallons per day)2022
LINCOLN WWTFLincoln5.9 MGD (million gallons per day)2022
Brawley WWTPBrawley5.9 MGD (million gallons per day)2022
ARDMORE CENTRAL WWTArdmore5.9 MGD (million gallons per day)2022
Edinburg WWTPEdinburg5.9 MGD (million gallons per day)2022
COLLINSVILLE STPCollinsville5.85 MGD (million gallons per day)2022
SMYRNA STPSmyrna5.85 MGD (million gallons per day)2022
Lake Jackson WWTPLake Jackson5.85 MGD (million gallons per day)2022
Salatrillo WWTPSan Antonio5.83 MGD (million gallons per day)2022
BELVIDERE STPBelvidere5.8 MGD (million gallons per day)2022
CRYSTAL LAKE STP 1&2Crystal Lake5.8 MGD (million gallons per day)2022
NILES WASTEWATER TREAT PLNiles5.8 MGD (million gallons per day)2022
St Croix Valley WWTF (MCES)Stillwater5.8 MGD (million gallons per day)2022
London WWTP & Sewer SystemLondon5.8 MGD (million gallons per day)2022
Solon Central WWTP & Sewer SystemSolon5.8 MGD (million gallons per day)2022
Millington STP #2Millington5.8 MGD (million gallons per day)2022
Harris Co WCID #47 WWTPHouston5.76 MGD (million gallons per day)2022
CORALVILLE STLCoralville5.754 MGD (million gallons per day)2022
Peach Street Plant WWTPGrapevine5.75 MGD (million gallons per day)2022
Greenville WWTPGreenville5.723 MGD (million gallons per day)2022
TriCo RSDZionsville5.72 MGD (million gallons per day)2022
LEWISTON S/T PLANTLewiston5.71 MGD (million gallons per day)2022
EMMETT SEWAGE LAGOONEmmett5.7 MGD (million gallons per day)2022
CLEAR LAKE SEWER DISTClear Lake5.7 MGD (million gallons per day)2022
MINOT WASTEWATERMinot5.66 MGD (million gallons per day)2022
FARMINGTON WPCFFarmington5.65 MGD (million gallons per day)2022
O'Fallon, CityO Fallon5.61 MGD (million gallons per day)2022
Covington WRFCovington5.6 MGD (million gallons per day)2022
CANONSBURG HOUSTON JOINT AUTHCanonsburg5.6 MGD (million gallons per day)2022
REDONDO STPRedondo5.6 MGD (million gallons per day)2022
BEAVER DAM WWTPBeaver Dam5.6 MGD (million gallons per day)2022
Burlingame WWTPBurlingame5.5 MGD (million gallons per day)2022
SOLEDAD WWTFSoledad5.5 MGD (million gallons per day)2022
City of Lompoc WWTPLompoc5.5 MGD (million gallons per day)2022
Oceanside, City of (La Salina WWTF)Oceanside5.5 MGD (million gallons per day)2022
WINDHAM, TOWN OFWillimantic5.5 MGD (million gallons per day)2022
WILLIMANTIC, TOWN OFWillimantic5.5 MGD (million gallons per day)2022
Grant Street STPMelbourne5.5 MGD (million gallons per day)2022
BCUD/SOUTH CENTRAL Regional WWTFMelbourne5.5 MGD (million gallons per day)2022
MOLINE NORTH SLOPE SEWAGEMoline5.5 MGD (million gallons per day)2022
ALPENA WWTSAlpena5.5 MGD (million gallons per day)2022
JOHN UMSTEAD WWTP (BUTNER)Butner5.5 MGD (million gallons per day)2022
GUYMON UA NORTHEAST WWTGuymon5.5 MGD (million gallons per day)2022
FOREST GROVE STPForest Grove5.5 MGD (million gallons per day)2022
PENDLETON STPPendleton5.5 MGD (million gallons per day)2022
Walnut Branch WWTPSeguin5.5 MGD (million gallons per day)2022
WENATCHEE POTWWenatchee5.5 MGD (million gallons per day)2022
HUTCHINSON WWTPHutchinson5.43 MGD (million gallons per day)2022
NORTHEAST WWTPBossier City5.4 MGD (million gallons per day)2022
Hoosac Water Pollution Control FacilityWilliamstown5.4 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.