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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
REEDSBURG STPReedsburg2.65 MGD (million gallons per day)2022
OSCEOLA WWTP SOUTHOsceola2.648 MGD (million gallons per day)2022
BATESVILLE WWTPBatesville2.644 MGD (million gallons per day)2022
CARBONDALE NWWTPCarbondale2.64 MGD (million gallons per day)2022
Berlin WWTFBerlin2.64 MGD (million gallons per day)2022
Chelan City of POTWChelan2.64 MGD (million gallons per day)2022
BRIGHTON WWTPBrighton2.63 MGD (million gallons per day)2022
WOLF WWTPShawano2.63 MGD (million gallons per day)2022
IOWA FALLS WWTPIowa Falls2.625 MGD (million gallons per day)2022
Saranac Lake (V) STP & San SewersSaranac Lake2.62 MGD (million gallons per day)2022
SUMNER STPSumner2.62 MGD (million gallons per day)2022
Big Gulch WWTPMukilteo2.61 MGD (million gallons per day)2022
Lanett WWTPLanett2.6 MGD (million gallons per day)2022
SARALAND WWTPSaraland2.6 MGD (million gallons per day)2022
Harrison WWTPHarrison2.6 MGD (million gallons per day)2022
James A King WWTFBarnesville2.6 MGD (million gallons per day)2022
Little River WRFWoodstock2.6 MGD (million gallons per day)2022
Huntley, West PlantHuntley2.6 MGD (million gallons per day)2022
Peru: GrissomPeru2.6 MGD (million gallons per day)2022
HUNTINGTON WWTPHuntington2.6 MGD (million gallons per day)2022
ALGONA WWTPAlgona2.6 MGD (million gallons per day)2022
ABBEVILLE STPAbbeville2.6 MGD (million gallons per day)2022
GLENCOE WWTPGlencoe2.6 MGD (million gallons per day)2022
Sedalia Southeast WWTPSedalia2.6 MGD (million gallons per day)2022
Lebanon WWTPLebanon2.6 MGD (million gallons per day)2022
Huntington, (T) STP & CollectionHuntington2.6 MGD (million gallons per day)2022
Guilderland (T) Nott Road WWTPGuilderland2.6 MGD (million gallons per day)2022
Westfield (V) WWTPWestfield2.6 MGD (million gallons per day)2022
WALLACE WWTPWallace2.6 MGD (million gallons per day)2022
CLAREMORE WWTClaremore2.6 MGD (million gallons per day)2022
MILTON REGIONAL STPMilton2.6 MGD (million gallons per day)2022
DAYTON STPDayton2.6 MGD (million gallons per day)2022
Isla Blanca Park WWTPPort Isabel2.6 MGD (million gallons per day)2022
ALAMOSA WWTPAlamosa2.57 MGD (million gallons per day)2022
JEFFERSON STPJefferson2.568 MGD (million gallons per day)2022
PROUTS NECK W P C FScarborough2.56 MGD (million gallons per day)2022
Santa Paula WRFSanta Paula2.55 MGD (million gallons per day)2022
James CreekSuwanee2.55 MGD (million gallons per day)2022
MILAN STPMilan2.55 MGD (million gallons per day)2022
Brenham WWTPBrenham2.55 MGD (million gallons per day)2022
Braselton WRPBraselton2.54 MGD (million gallons per day)2022
BARABOO STPBaraboo2.53 MGD (million gallons per day)2022
WESTERN RACINE CO. SD - STPRochester2.53 MGD (million gallons per day)2022
PETOSKEY WWTPPetoskey2.51 MGD (million gallons per day)2022
Eagle River WWTPEagle River2.5 MGD (million gallons per day)2022
Lake Havasu City Pittsburgh Island WWTPLake Havasu City2.5 MGD (million gallons per day)2022
Florence South WRFFlorence2.5 MGD (million gallons per day)2022
Magnolia WWTPMagnolia2.5 MGD (million gallons per day)2022
American Canyon WWTFAmerican Canyon2.5 MGD (million gallons per day)2022
PATTERSON WWTFPatterson2.5 MGD (million gallons per day)2022
LEMOORE STPLemoore2.5 MGD (million gallons per day)2022
RED BLUFF WWTFRed Bluff2.5 MGD (million gallons per day)2022
Alan Horton WWTFDesert Hot Springs2.5 MGD (million gallons per day)2022
Lower Fountain Metropolitan SDDFountain2.5 MGD (million gallons per day)2022
CLIFTON #2 WEST WWTPClifton2.5 MGD (million gallons per day)2022
FRASER WWTPFraser2.5 MGD (million gallons per day)2022
Widefield WSDFountain2.5 MGD (million gallons per day)2022
E WINDSOR WAREHOUSE PT.East Windsor2.5 MGD (million gallons per day)2022
MIDDLETOWN C.S.Middletown2.5 MGD (million gallons per day)2022
MILTON WWTPMilton2.5 MGD (million gallons per day)2022
LYNN HAVEN AWTFLynn Haven2.5 MGD (million gallons per day)2022
Ash Street STPOrange Park2.5 MGD (million gallons per day)2022
PARKWAY STPKissimmee2.5 MGD (million gallons per day)2022
IMMOKALEE WWTPImmokalee2.5 MGD (million gallons per day)2022
Jesup WPCFJesup2.5 MGD (million gallons per day)2022
Bainbridge WPCPBainbridge2.5 MGD (million gallons per day)2022
Cabin Creek WPCFGriffin2.5 MGD (million gallons per day)2022
Adel WPCPAdel2.5 MGD (million gallons per day)2022
Dawson WPCPDawson2.5 MGD (million gallons per day)2022
Thomson WPCPThomson2.5 MGD (million gallons per day)2022
Woodstock (Rubes Creek WPCP)Woodstock2.5 MGD (million gallons per day)2022
WAHIAWA WWTPWahiawa2.5 MGD (million gallons per day)2022
LIHUE WWTFLihue2.5 MGD (million gallons per day)2022
Morris, Main WWTPMorris2.5 MGD (million gallons per day)2022
MOKENA STPMokena2.5 MGD (million gallons per day)2022
ROBINSON STPRobinson2.5 MGD (million gallons per day)2022
CLINTON WWTPClinton2.5 MGD (million gallons per day)2022
INDIANOLA NORTH WWTPIndianola2.5 MGD (million gallons per day)2022
DERBY WWTPDerby2.5 MGD (million gallons per day)2022
GARDNER KILL CREEK WWTPGardner2.5 MGD (million gallons per day)2022
JUNCTION CITY EAST WWTPJunction City2.5 MGD (million gallons per day)2022
ATCHISON WWTPAtchison2.5 MGD (million gallons per day)2022
PARSONS WWTPParsons2.5 MGD (million gallons per day)2022
HAYS WWTPHays2.5 MGD (million gallons per day)2022
JUNCTION CITY SW WWTPJunction City2.5 MGD (million gallons per day)2022
EUNICE STPEunice2.5 MGD (million gallons per day)2022
JENNINGS STPJennings2.5 MGD (million gallons per day)2022
TRIUMPH-BURAS STPBuras2.5 MGD (million gallons per day)2022
GONZALES WWTPGonzales2.5 MGD (million gallons per day)2022
SANFORD W W T FSanford2.5 MGD (million gallons per day)2022
MARYLAND CITY WWTPLaurel2.5 MGD (million gallons per day)2022
Ocean Pines WWTPBerlin2.5 MGD (million gallons per day)2022
ST JOHNS WWTPSaint Johns2.5 MGD (million gallons per day)2022
SOUTH LYON WWTPSouth Lyon2.5 MGD (million gallons per day)2022
DOWAGIAC STPDowagiac2.5 MGD (million gallons per day)2022
ALMA WWTPAlma2.5 MGD (million gallons per day)2022
CHEBOYGAN WWTPCheboygan2.5 MGD (million gallons per day)2022
LUDINGTON STPLudington2.5 MGD (million gallons per day)2022
BEMIDJI WWTFBemidji2.5 MGD (million gallons per day)2022
CENTRAL IRON RANGE WWTPChisholm2.5 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.