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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
Orlando - Conserv II WRFOrlando21 MGD (million gallons per day)2022
Macon Lower Poplar WRFMacon21 MGD (million gallons per day)2022
MSD Grand Glaize WWTFValley Park21 MGD (million gallons per day)2022
ROCKFISH CREEK WWTPFayetteville21 MGD (million gallons per day)2022
ROCKY MOUNT WWTPRocky Mount21 MGD (million gallons per day)2022
LOWER MUDDY CREEK WWTPWinston Salem21 MGD (million gallons per day)2022
Midland Plant #1 WWTPMidland21 MGD (million gallons per day)2022
PROVOProvo21 MGD (million gallons per day)2022
North Hudson SA (Adam St WWTP) - CS/CSO/STPHoboken20.8 MGD (million gallons per day)2022
Evansville WESTSIDE WWTPEvansville20.6 MGD (million gallons per day)2022
Columbia Regional WWTPColumbia20.6 MGD (million gallons per day)2022
Westchester (Co) Mamaroneck SD STPMamaroneck20.6 MGD (million gallons per day)2022
WATERLOO WWTPWaterloo20.35 MGD (million gallons per day)2022
Dublin-San Ramon WWTFPleasanton20.2 MGD (million gallons per day)2022
Cranston WPCFCranston20.2 MGD (million gallons per day)2022
Huntsville Western Area WWTPMadison20 MGD (million gallons per day)2022
Florence Cypress Creek WWTPFlorence20 MGD (million gallons per day)2022
Scottsdale Water Campus AWTScottsdale20 MGD (million gallons per day)2022
Oro Loma and Castro Valley Sanitary Districts (WPCP)San Lorenzo20 MGD (million gallons per day)2022
L.A.-Glendale WRPLos Angeles20 MGD (million gallons per day)2022
TURLOCK WWTFTurlock20 MGD (million gallons per day)2022
San Jacinto Regional WRFSan Jacinto20 MGD (million gallons per day)2022
Colorado Springs Utilities JD Phillips WRFColorado Springs20 MGD (million gallons per day)2022
St Petersburg Southwest WWTPSaint Petersburg20 MGD (million gallons per day)2022
St Petersburg Northwest WWTPSaint Petersburg20 MGD (million gallons per day)2022
BOCA RATON WWTFBoca Raton20 MGD (million gallons per day)2022
East Area WQCFAtlanta20 MGD (million gallons per day)2022
Looper Pre LAS WPCPDalton20 MGD (million gallons per day)2022
Dekalb County Polebridge WWTPLithonia20 MGD (million gallons per day)2022
Riverbend Pre LAS WPCP (Dalton)Dalton20 MGD (million gallons per day)2022
MISHAWAKA WWTPMishawaka20 MGD (million gallons per day)2022
ELKHART WWTPElkhart20 MGD (million gallons per day)2022
N KY SD1 - Western Regional STPPetersburg20 MGD (million gallons per day)2022
NEW ORLEANS W. BANK STPNew Orleans20 MGD (million gallons per day)2022
SOD RUN WWTPAberdeen20 MGD (million gallons per day)2022
SENECA CREEK WWTPGermantown20 MGD (million gallons per day)2022
PORT HURON WWTPPort Huron20 MGD (million gallons per day)2022
GREENVILLE POTWGreenville20 MGD (million gallons per day)2022
Birmingham WWTPKansas City20 MGD (million gallons per day)2022
Ocean County UA Southern WPCF - CS/STPWest Creek20 MGD (million gallons per day)2022
NORTH DURHAM WATER REC. FAC.Durham20 MGD (million gallons per day)2022
SOUTH DURHAM WATER REC. FAC.Chapel Hill20 MGD (million gallons per day)2022
SUGAR CREEK WWTPCharlotte20 MGD (million gallons per day)2022
GRANT CREEK WWTPSalisbury20 MGD (million gallons per day)2022
Gary L Kron WRF & Sewer SystemMentor20 MGD (million gallons per day)2022
MEDFORD STPCentral Point20 MGD (million gallons per day)2022
BETHLEHEM CITY STPBethlehem20 MGD (million gallons per day)2022
MANCHESTER CREEK WWTPRock Hill20 MGD (million gallons per day)2022
Murfreesboro - Sinking Creek STPMurfreesboro20 MGD (million gallons per day)2022
Almeda Sims WWTPHouston20 MGD (million gallons per day)2022
NORTHSIDE/SOUTHSIDE STPDanville20 MGD (million gallons per day)2022
JAMES RIVER W P C FNewport News20 MGD (million gallons per day)2022
La Crosse WWTPLa Crosse20 MGD (million gallons per day)2022
OSHKOSH WWTPOshkosh20 MGD (million gallons per day)2022
PORTLAND EAST END WWTFPortland19.8 MGD (million gallons per day)2022
Delta Diablo Wastewater Treatment PlantAntioch19.5 MGD (million gallons per day)2022
John J. DiFonzo Water Reclamation FacilityCumberland19.5 MGD (million gallons per day)2022
Hamby WWTPAbilene19.2 MGD (million gallons per day)2022
PUEBLO WWTPPueblo19 MGD (million gallons per day)2022
JO CO TOM CRK WWTPLeawood19 MGD (million gallons per day)2022
JACKSON WWTPJackson19 MGD (million gallons per day)2022
Wichita Falls - River Road WWTPWichita Falls19 MGD (million gallons per day)2022
Plantation STPFort Lauderdale18.9 MGD (million gallons per day)2022
Advanced Water Purification FacilityOxnard18.75 MGD (million gallons per day)2022
JO CO MILL CREEK REG WWTPOverland Park18.75 MGD (million gallons per day)2022
EAST LANSING WWPEast Lansing18.75 MGD (million gallons per day)2022
Hayward, City of (WPCF)Hayward18.5 MGD (million gallons per day)2022
Schenectady (C) Sewers & STPSchenectady18.5 MGD (million gallons per day)2022
Lima WWTP & Sewer SystemLima18.5 MGD (million gallons per day)2022
SHEBOYGAN REGIONAL WWTPSheboygan18.4 MGD (million gallons per day)2022
ALBERT LEA WWTPAlbert Lea18.38 MGD (million gallons per day)2022
JOLIET - EASTSIDE STPJoliet18.2 MGD (million gallons per day)2022
Haverhill Sewerage Collection System and WWTFHaverhill18.1 MGD (million gallons per day)2022
Chandler Ocotillo WRFChandler18 MGD (million gallons per day)2022
Mesa Northwest WRPMesa18 MGD (million gallons per day)2022
Dry Creek WWTPRoseville18 MGD (million gallons per day)2022
Victor Valley Regional WWRPVictorville18 MGD (million gallons per day)2022
South Bay WRPSan Diego18 MGD (million gallons per day)2022
Hale Avenue RRFEscondido18 MGD (million gallons per day)2022
NORWALK WPCFNorwalk18 MGD (million gallons per day)2022
LARGO AWWTFClearwater18 MGD (million gallons per day)2022
Rome Blacks Bluff WTPRome18 MGD (million gallons per day)2022
Evansville EASTSIDE WWTPEvansville18 MGD (million gallons per day)2022
Richmond WWTPRichmond18 MGD (million gallons per day)2022
MONROE WATER POLL CONTROL CENTERMonroe18 MGD (million gallons per day)2022
BANGOR POLL ABATE FACBangor18 MGD (million gallons per day)2022
Brockton Sewerage Collection System and WWTFBrockton18 MGD (million gallons per day)2022
BATTLE CREEK STPBattle Creek18 MGD (million gallons per day)2022
WESTERN WAKE REGIONAL WMFNew Hill18 MGD (million gallons per day)2022
LAWTON WWTLawton18 MGD (million gallons per day)2022
LAREDO SOUTHSIDE STPLaredo18 MGD (million gallons per day)2022
WWTP # 1Killeen18 MGD (million gallons per day)2022
Northwest WWTP - HoustonHouston18 MGD (million gallons per day)2022
Upper Brays Regional WWTPHouston18 MGD (million gallons per day)2022
LOGANLogan18 MGD (million gallons per day)2022
ARMY BASE W P C FNorfolk18 MGD (million gallons per day)2022
CHAMBERS CREEKUniversity Place18 MGD (million gallons per day)2022
ST CLOUD WWTFSaint Cloud17.9 MGD (million gallons per day)2022
Northwest WWTPEl Paso17.82 MGD (million gallons per day)2022
NORTH SHORE S.D. - CLAVEY RD PLANTHighland Park17.8 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.