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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
GOLDSBORO WWTPGoldsboro17.6 MGD (million gallons per day)2022
TOLLESON WWTFTolleson17.5 MGD (million gallons per day)2022
BOISE, CITY OF--WEST BOISEBoise17.5 MGD (million gallons per day)2022
Holyoke Sewerage Collection System and WPCFHolyoke17.5 MGD (million gallons per day)2022
GREENVILLE UTILITIES COMM. WWTPGreenville17.5 MGD (million gallons per day)2022
River Road WWTPAmarillo17.44 MGD (million gallons per day)2022
Miller Avenue WWTPJackson17.4 MGD (million gallons per day)2022
URBANA CHAMPAIGN SD -NORTHEAST STPUrbana17.3 MGD (million gallons per day)2022
Two Rivers Water Reclamation Authority (WRA) - CS/STPMonmouth Beach17.23 MGD (million gallons per day)2022
TYRONE BORO STPTyrone17.04 MGD (million gallons per day)2022
City of Pleasanton CollectionsPleasanton17 MGD (million gallons per day)2022
SANTA CRUZ WWTFSanta Cruz17 MGD (million gallons per day)2022
IDAHO FALLS STPIdaho Falls17 MGD (million gallons per day)2022
Linden Roselle SA - CS-CSO/STPLinden17 MGD (million gallons per day)2022
Massillon WWTP & Sewer SystemMassillon17 MGD (million gallons per day)2022
GRESHAM STPPortland17 MGD (million gallons per day)2022
GSWSA/MYRTLE BEACH WWTPConway17 MGD (million gallons per day)2022
Budd Inlet Treatment PlantOlympia17 MGD (million gallons per day)2022
HUNTINGTON WWTPHuntington17 MGD (million gallons per day)2022
Texarkana South Regional WWTPTexarkana16.6 MGD (million gallons per day)2022
Intrenchment Creek WRCAtlanta16.52 MGD (million gallons per day)2022
KENT COUNTY STPMilford16.3 MGD (million gallons per day)2022
SEWER FARM STPSan Angelo16.3 MGD (million gallons per day)2022
Cartersville WPCPCartersville16.23 MGD (million gallons per day)2022
OSO STPCorpus Christi16.2 MGD (million gallons per day)2022
Tapia Water Reclamation FacilityCalabasas16.1 MGD (million gallons per day)2022
Marine Park WWTFVancouver16.1 MGD (million gallons per day)2022
JANESVILLE WWTPJanesville16.1 MGD (million gallons per day)2022
GLENBARD WASTEWATER AUTHORITYGlen Ellyn16.02 MGD (million gallons per day)2022
Little Rock - Fourche Creek WWTPLittle Rock16 MGD (million gallons per day)2022
Conway - Tupelo Bayou WWTPConway16 MGD (million gallons per day)2022
Richmond Municipal Sewer District Water Pollution Control PlantRichmond16 MGD (million gallons per day)2022
Bakersfield WWTP #3Bakersfield16 MGD (million gallons per day)2022
St Petersburg Northeast WWTPSaint Petersburg16 MGD (million gallons per day)2022
SOUTH COUNTY REGIONAL WWTFNaples16 MGD (million gallons per day)2022
Calhoun WPCPCalhoun16 MGD (million gallons per day)2022
Crooked Creek WRFNorcross16 MGD (million gallons per day)2022
DANVILLE SANITARY DISTRICTDanville16 MGD (million gallons per day)2022
Lake County DPW (Desplaines STP)Buffalo Grove16 MGD (million gallons per day)2022
TOPEKA OAKLAND WWTPTopeka16 MGD (million gallons per day)2022
HOUMA N REG TRTMT PLTHouma16 MGD (million gallons per day)2022
Nashua WWTFNashua16 MGD (million gallons per day)2022
Parsippany-Troy Hills Township CS/STPParsippany16 MGD (million gallons per day)2022
Hamilton Township (Mercer) WPCF- CS/STPTrenton16 MGD (million gallons per day)2022
Plattsburgh (C) WWTPPlattsburgh16 MGD (million gallons per day)2022
Erie (Co) SD#3 Southtowns WWTPBuffalo16 MGD (million gallons per day)2022
LONG CREEK (Gastonia) WWTPDallas16 MGD (million gallons per day)2022
NORTH BUFFALO WWTPGreensboro16 MGD (million gallons per day)2022
Wilmington Northside WWTPWilmington16 MGD (million gallons per day)2022
Butler Co Upper Mill Creek WWTPWest Chester16 MGD (million gallons per day)2022
Warren WWTP & Sewer SystemWarren16 MGD (million gallons per day)2022
HAIKEY CREEK WWTBroken Arrow16 MGD (million gallons per day)2022
WOONSOCKET REGIONAL WWTFWoonsocket16 MGD (million gallons per day)2022
FRANKLIN STPFranklin16 MGD (million gallons per day)2022
Johnson City Brush Creek WWTPJohnson City16 MGD (million gallons per day)2022
GTUA-Post Oak Creek WWTPSherman16 MGD (million gallons per day)2022
Thorn Creek Basin. S.D. STPChicago Heights15.94 MGD (million gallons per day)2022
IBWC Nogales International WTPRio Rico15.7 MGD (million gallons per day)2022
San Mateo WWTFSan Mateo15.7 MGD (million gallons per day)2022
40 Acre Industrial WWTPTexas City15.7 MGD (million gallons per day)2022
Ashtabula WWTP & Sewer SystemAshtabula15.52 MGD (million gallons per day)2022
VSFCD WWTFVallejo15.5 MGD (million gallons per day)2022
Oceanside, City of (San Luis Rey WWTF)Oceanside15.5 MGD (million gallons per day)2022
DANBURY WPCFDanbury15.5 MGD (million gallons per day)2022
Chicopee Sewerage Collection System and WPCFChicopee15.5 MGD (million gallons per day)2022
Chelford City Regional WWTPHouston15.5 MGD (million gallons per day)2022
APPLETON WWTPAppleton15.5 MGD (million gallons per day)2022
MANITOWOC WWTPManitowoc15.5 MGD (million gallons per day)2022
NAPA SANIT. DIST WWRFNapa15.4 MGD (million gallons per day)2022
BENTON HARBOR-ST JOSEPHSaint Joseph15.3 MGD (million gallons per day)2022
KAILUA WWTPKailua15.25 MGD (million gallons per day)2022
Mattawoman WWTPLa Plata15.24 MGD (million gallons per day)2022
GRAND RAPIDS WWTPGrand Rapids15.2 MGD (million gallons per day)2022
Capital Region WaterHarrisburg15.2 MGD (million gallons per day)2022
Southeast WWTP - HoustonHouston15.2 MGD (million gallons per day)2022
Westchester (Co) New Rochelle STPNew Rochelle15.12 MGD (million gallons per day)2022
Coachella Valley Water District (Wastewater Reclamation Plant 10)Palm Desert15 MGD (million gallons per day)2022
LACSD (Pomona WRP)Pomona15 MGD (million gallons per day)2022
LACSD (Whittier Narrows WRP)El Monte15 MGD (million gallons per day)2022
Easterly Wastewater Treatment PlantElmira15 MGD (million gallons per day)2022
IEUA Regional Plant No.5Chino15 MGD (million gallons per day)2022
CAPE CORAL SW WWTPCape Coral15 MGD (million gallons per day)2022
Manatee County SW Regional WWTPBradenton15 MGD (million gallons per day)2022
Daytona Beach Westside Regional WWTFDaytona Beach15 MGD (million gallons per day)2022
Johns Creek WPCPRoswell15 MGD (million gallons per day)2022
Sangamon Co. WRD SUGAR CREEK WWTPSpringfield15 MGD (million gallons per day)2022
EAST CHICAGO STPEast Chicago15 MGD (million gallons per day)2022
BLOOMINGTON STP (SOUTH)Bloomington15 MGD (million gallons per day)2022
FT. DODGE WWTPFort Dodge15 MGD (million gallons per day)2022
JO CO NELSON COMPLEX WWTPOverland Park15 MGD (million gallons per day)2022
RWRA OWENSBORO WEST WWTPOwensboro15 MGD (million gallons per day)2022
HENDERSON STP #1 - NORTHHenderson15 MGD (million gallons per day)2022
BATON ROUGE NORTH WWTPBaton Rouge15 MGD (million gallons per day)2022
COX CREEK WWTPCurtis Bay15 MGD (million gallons per day)2022
Turkey Creek WWTPJoplin15 MGD (million gallons per day)2022
New Lower Meramec WWTPSaint Louis15 MGD (million gallons per day)2022
Northwest Bergen County UA - CS/STPWaldwick15 MGD (million gallons per day)2022
South Harnett Regional WWTPSpring Lake15 MGD (million gallons per day)2022
IRWIN CREEK WWTPCharlotte15 MGD (million gallons per day)2022
ALBEMARLE WWTPAlbemarle15 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.