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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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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
HAMMOND WWTPHammond27 MGD (million gallons per day)2022
St. Joseph WWTPSaint Joseph27 MGD (million gallons per day)2022
Trenton City - CS/CSO/STPTrenton27 MGD (million gallons per day)2022
LYNCHBURG REGIONAL WWTPLynchburg27 MGD (million gallons per day)2022
PROCTORS CREEK WWTPChester27 MGD (million gallons per day)2022
THOMAS P. SMITH WTPTallahassee26.5 MGD (million gallons per day)2022
West District WWTPHouston26.4 MGD (million gallons per day)2022
NAPERVILLENaperville26.25 MGD (million gallons per day)2022
LAFAYETTE WWTPLafayette26 MGD (million gallons per day)2022
DAVENPORT WWTPDavenport26 MGD (million gallons per day)2022
BILLINGS WWTPBillings26 MGD (million gallons per day)2022
HIGH POINT EASTSIDE WWTPJamestown26 MGD (million gallons per day)2022
Middletown WWTP & Sewer SystemMiddletown26 MGD (million gallons per day)2022
Cowlitz Water Pollution Control PlaLongview26 MGD (million gallons per day)2022
RAGNONE (DIST.#2) WWTPMontrose25.9 MGD (million gallons per day)2022
Lynn Sewerage Collection System and WPCFLynn25.8 MGD (million gallons per day)2022
Clinton River Water Resource Recovery FacilityPontiac25.5 MGD (million gallons per day)2022
Little Patuxent WWTPSavage25.03 MGD (million gallons per day)2022
LACSD (Long Beach WRP)Long Beach25 MGD (million gallons per day)2022
Bakersfield WWTP #2Bakersfield25 MGD (million gallons per day)2022
BOULDER 75TH STREET WWTPBoulder25 MGD (million gallons per day)2022
ARLINGTON EAST WWTFJacksonville25 MGD (million gallons per day)2022
Kankakee River Metropolitan AgencyKankakee25 MGD (million gallons per day)2022
FRWRD Main STP aka Pagorski WWTPElgin25 MGD (million gallons per day)2022
Albany (Co) - ACSD South STPAlbany25 MGD (million gallons per day)2022
CROSS CREEK WWTPFayetteville25 MGD (million gallons per day)2022
Montgomery Co Western Regional WWTP & SewersDayton25 MGD (million gallons per day)2022
Springfield WWTP & Sewer SystemSpringfield25 MGD (million gallons per day)2022
CLARKSVILLE WWTPClarksville25 MGD (million gallons per day)2022
South Mesquite Creek WWTPMesquite25 MGD (million gallons per day)2022
ST GEORGESaint George25 MGD (million gallons per day)2022
BROAD RUN REG. RECL. FAC.Ashburn24.8 MGD (million gallons per day)2022
Rowlett Creek WWTPGarland24.61 MGD (million gallons per day)2022
IOWA CITY SOUTH WWTPIowa City24.2 MGD (million gallons per day)2022
NORTH COUNTY REGIONAL WWTFNaples24.1 MGD (million gallons per day)2022
Gloucester County UA - CS/STPPaulsboro24.1 MGD (million gallons per day)2022
TUSCALOOSA WWTPTuscaloosa24 MGD (million gallons per day)2022
Scottsdale Water Campus WRPScottsdale24 MGD (million gallons per day)2022
Springdale WWTPSpringdale24 MGD (million gallons per day)2022
STAMFORD WPCFStamford24 MGD (million gallons per day)2022
SUNRISE STP NO. 3 (Sawgrass)Fort Lauderdale24 MGD (million gallons per day)2022
OCUD/Eastern Subregional WRFOrlando24 MGD (million gallons per day)2022
South Central WWTFDelray Beach24 MGD (million gallons per day)2022
Big Creek WRFRoswell24 MGD (million gallons per day)2022
Camp Creek WRFAtlanta24 MGD (million gallons per day)2022
E L Huie-Casey Natural Treatment SystemJonesboro24 MGD (million gallons per day)2022
TERRE HAUTE WWTPTerre Haute24 MGD (million gallons per day)2022
WYOMING WWTPWyoming24 MGD (million gallons per day)2022
MONROE METRO WWTPMonroe24 MGD (million gallons per day)2022
HURON VALLEY WWTP-SOUTHRockwood24 MGD (million gallons per day)2022
Rensselaer (Co) SD#1 WWTPTroy24 MGD (million gallons per day)2022
ROCKY RIVER WWTPConcord24 MGD (million gallons per day)2022
Wilmington Southside WWTPWilmington24 MGD (million gallons per day)2022
Nashville - Dry Creek WWTPNashville24 MGD (million gallons per day)2022
Ten Mile Creek WWTPFerris24 MGD (million gallons per day)2022
Rowlett Creek WWTP #1Plano24 MGD (million gallons per day)2022
MOONEYWoodbridge24 MGD (million gallons per day)2022
ROCHESTER WWTPRochester23.85 MGD (million gallons per day)2022
Fairfield-Suisun Sewer DistrictFairfield23.7 MGD (million gallons per day)2022
BUCKLIN PT STPEast Providence23.7 MGD (million gallons per day)2022
NORTH SHORE S.D. - GURNEE STPGurnee23.6 MGD (million gallons per day)2022
KOKOMO MUN WWTPKokomo23.5 MGD (million gallons per day)2022
Somerset Raritan Valley RSA - CS/STPBridgewater23.1 MGD (million gallons per day)2022
Keegan's Bayou WWTPHouston23.1 MGD (million gallons per day)2022
Fort Collins Drake WW Reclamat FacFort Collins23 MGD (million gallons per day)2022
GRANITE CITY REGIONAL WWTP & COLL SYSTEMGranite City23 MGD (million gallons per day)2022
FORT SCOTT WWTPFort Scott23 MGD (million gallons per day)2022
HARRISONBURG-ROCKINGHAMMount Crawford23 MGD (million gallons per day)2022
SOUTH CENTRAL REGIONAL WWTPPetersburg23 MGD (million gallons per day)2022
DURHAM STPPortland22.6 MGD (million gallons per day)2022
Moreno Valley Regional WRFMoreno Valley22.5 MGD (million gallons per day)2022
Temecula Valley Regional WRFTemecula22.5 MGD (million gallons per day)2022
ECUA- Central WRFCantonment22.5 MGD (million gallons per day)2022
BLOOMINGTON-NORMAL WEST (OLD) STPBloomington22.5 MGD (million gallons per day)2022
Upper Potomac River Comm WWTPWesternport22.5 MGD (million gallons per day)2022
K.C. West Side WWTPKansas City22.5 MGD (million gallons per day)2022
Lucas Co Water Resource Recovery FacilityWaterville22.5 MGD (million gallons per day)2022
WILLIAMSBURG W P C FWilliamsburg22.5 MGD (million gallons per day)2022
MSD Muddy Creek Drainage BasinCincinnati22.3 MGD (million gallons per day)2022
Pecan Creek WWTPDenton22.136 MGD (million gallons per day)2022
Visalia WWTPVisalia22 MGD (million gallons per day)2022
Gwinnett Yellow River WRFLilburn22 MGD (million gallons per day)2022
WAUKEGAN STP - NORTH SHORE S.D.Waukegan22 MGD (million gallons per day)2022
Alexandria WWTPAlexandria22 MGD (million gallons per day)2022
Monroe (Co) NW Quadrant WWTPHilton22 MGD (million gallons per day)2022
Lockport (C) WWTP and SewersLockport22 MGD (million gallons per day)2022
Euclid WWTP & Sewer SystemEuclid22 MGD (million gallons per day)2022
Rocky River WWTP & Sewer SystemRocky River22 MGD (million gallons per day)2022
Sandusky WWTP & Sewer SystemSandusky22 MGD (million gallons per day)2022
RUSTBURG STPLynchburg22 MGD (million gallons per day)2022
Longview Main WWTPLongview21.78 MGD (million gallons per day)2022
LACSD (Valencia WRP)Valencia21.6 MGD (million gallons per day)2022
CLEVELAND UTILITIES STPCleveland21.6 MGD (million gallons per day)2022
Brushy Creek Regional WWTPRound Rock21.5 MGD (million gallons per day)2022
Yakima Regional POTWYakima21.5 MGD (million gallons per day)2022
Laguna Wastewater Treatment PlantSanta Rosa21.3 MGD (million gallons per day)2022
Anderson WWTPAnderson21.25 MGD (million gallons per day)2022
GREAT FALLS WWTPGreat Falls21.1 MGD (million gallons per day)2022
MONTGOMERY ENCONCHATE WWTPMontgomery21 MGD (million gallons per day)2022
LACSD (Lancaster WRP)Lancaster21 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.