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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
Melton Hill STPKnoxville10 MGD (million gallons per day)2022
Lebanon WWTPLebanon10 MGD (million gallons per day)2022
Oak Ridge STPOak Ridge10 MGD (million gallons per day)2022
Harpeth Valley UD STPNashville10 MGD (million gallons per day)2022
Temple-Belton WWTPBelton10 MGD (million gallons per day)2022
North WWTP - BrownsvilleBrownsville10 MGD (million gallons per day)2022
Plant #2 - HarlingenHarlingen10 MGD (million gallons per day)2022
River Bend Water Reclamation PlantLewisville10 MGD (million gallons per day)2022
Broadway WWTPCorpus Christi10 MGD (million gallons per day)2022
Flower Mound WWTPFlower Mound10 MGD (million gallons per day)2022
Muddy Creek WWTPWylie10 MGD (million gallons per day)2022
North Texas MWD - Panther Creek WWTPWylie10 MGD (million gallons per day)2022
Southside WWTPTyler10 MGD (million gallons per day)2022
Golden Acres WWTPPasadena10 MGD (million gallons per day)2022
Southwest WWTP - ConroeConroe10 MGD (million gallons per day)2022
AQUIA REGIONAL STPStafford10 MGD (million gallons per day)2022
LAKOTA STPFederal Way10 MGD (million gallons per day)2022
WHEELING WWTPWheeling10 MGD (million gallons per day)2022
Green Bay MSD (NEW Water) - De PereGreen Bay10 MGD (million gallons per day)2022
CASPER WWTPCasper10 MGD (million gallons per day)2022
Coachella Valley Water District (Mid-Valley Water Reclamation Plant No. 4)Thermal9.9 MGD (million gallons per day)2022
Greene Co Sugarcreek WWTP and SewersSpring Valley9.9 MGD (million gallons per day)2022
Manteca WQCFManteca9.87 MGD (million gallons per day)2022
San Marcos WWTPSan Marcos9.87 MGD (million gallons per day)2022
FOND DU LAC REGIONAL WWTPFond Du Lac9.84 MGD (million gallons per day)2022
Eagle River WSDVail9.83 MGD (million gallons per day)2022
Goleta Sanitary District Water Resource Recovery FacilityGoleta9.8 MGD (million gallons per day)2022
South Monmouth Regional CS/STPBelmar9.8 MGD (million gallons per day)2022
Rapid CityRapid City9.8 MGD (million gallons per day)2022
CORVALLIS STPCorvallis9.7 MGD (million gallons per day)2022
Hallsdale-Powell Beaver Creek STPKnoxville9.7 MGD (million gallons per day)2022
Attleboro Sewerage Collection System and WWTFAttleboro9.69 MGD (million gallons per day)2022
OKC-CHISHOLM CREEK WWTEdmond9.68 MGD (million gallons per day)2022
PARKERSBURG WWTPParkersburg9.66 MGD (million gallons per day)2022
St. Chas. Miss. River STPSaint Charles9.63 MGD (million gallons per day)2022
Tahoe-Truckee WWTPTruckee9.6 MGD (million gallons per day)2022
MARRERO PLANTMarrero9.6 MGD (million gallons per day)2022
WINONA WWTPWinona9.6 MGD (million gallons per day)2022
Victoria Regional WWTPVictoria9.6 MGD (million gallons per day)2022
WALLA WALLA STPWalla Walla9.6 MGD (million gallons per day)2022
NORTHEAST STPLincoln9.52 MGD (million gallons per day)2022
Redlands WWRFRedlands9.5 MGD (million gallons per day)2022
Pembroke Pines WWTPHollywood9.5 MGD (million gallons per day)2022
Spencer Creek STPSaint Charles9.5 MGD (million gallons per day)2022
Glens Falls (C) WWTPGlens Falls9.5 MGD (million gallons per day)2022
Willoughby Eastlake WWTP & SewersEastlake9.5 MGD (million gallons per day)2022
Carter's Creek WWTPCollege Station9.5 MGD (million gallons per day)2022
DYERSBURG WWTPDyersburg9.45 MGD (million gallons per day)2022
Plum Creek WW Auth Plant #1Castle Rock9.44 MGD (million gallons per day)2022
MASSAPONAX CREEK STPFredericksburg9.4 MGD (million gallons per day)2022
MERIDIAN STPMeridian9.3 MGD (million gallons per day)2022
SOUTH PORTLAND STPSouth Portland9.3 MGD (million gallons per day)2022
E NORR PLYM WHIT STPPlymouth Meeting9.3 MGD (million gallons per day)2022
KENNEWICK POTWKennewick9.3 MGD (million gallons per day)2022
Blackhawk Regional WWTPHouston9.25 MGD (million gallons per day)2022
MAIN STPPort Arthur9.2 MGD (million gallons per day)2022
ATHENS WWTPAthens9 MGD (million gallons per day)2022
AUBURN H C MORGAN WWTPAuburn9 MGD (million gallons per day)2022
Avondale WWTFAvondale9 MGD (million gallons per day)2022
Jonesboro - East WWTPJonesboro9 MGD (million gallons per day)2022
Batesville WWTPBatesville9 MGD (million gallons per day)2022
South County Regional Wastewater Treatment and Reclamation FacilityGilroy9 MGD (million gallons per day)2022
Santa Margarita Water District (Chiquita WRP)San Juan Capistrano9 MGD (million gallons per day)2022
FAIRFIELD WPCFFairfield9 MGD (million gallons per day)2022
South Coastal WWTFFrankford9 MGD (million gallons per day)2022
William E. Dunn WRFPalm Harbor9 MGD (million gallons per day)2022
BRADENTON WWTPBradenton9 MGD (million gallons per day)2022
Warner Robins Sandy Run Creek WPCPWarner Robins9 MGD (million gallons per day)2022
LAHAINA WWRFLahaina9 MGD (million gallons per day)2022
NORTHWEST REGIONAL WRF @ FOX LAKEFox Lake9 MGD (million gallons per day)2022
MOLINE SOUTH WWTPMoline9 MGD (million gallons per day)2022
ST. CHARLES EAST STPSaint Charles9 MGD (million gallons per day)2022
WEST LAFAYETTE WWTPWest Lafayette9 MGD (million gallons per day)2022
LOGANSPORT WWTPLogansport9 MGD (million gallons per day)2022
Jeffersonville Downtown WWTPJeffersonville9 MGD (million gallons per day)2022
Paducah McCracken Co JSA - PaducahPaducah9 MGD (million gallons per day)2022
Gas House Pike WWTPFrederick9 MGD (million gallons per day)2022
MOORHEAD WWTPMoorhead9 MGD (million gallons per day)2022
Harrison County Utility Authority - West Biloxi POTWBiloxi9 MGD (million gallons per day)2022
Cortland (C) WWTPCortland9 MGD (million gallons per day)2022
Onondaga (Co) Baldwinsville-Seneca Knolls WWTPBaldwinsville9 MGD (million gallons per day)2022
HENRY FORK WWTP (HICKORY)Hickory9 MGD (million gallons per day)2022
ASHEBORO WWTPAsheboro9 MGD (million gallons per day)2022
LUMBERTON WWTPLumberton9 MGD (million gallons per day)2022
Clermont Co Lower East Fork WWTPMilford9 MGD (million gallons per day)2022
PONCA CITY MUNICIPAL WWTPonca City9 MGD (million gallons per day)2022
Mission WWTPMission9 MGD (million gallons per day)2022
PLANT #2Corsicana9 MGD (million gallons per day)2022
Clear Lake City WWTPPasadena9 MGD (million gallons per day)2022
PEPPERS FERRY STPPulaski9 MGD (million gallons per day)2022
MIDWAY SEWER DISTRICT WWTPKent9 MGD (million gallons per day)2022
FAIRMONT WWTPFairmont9 MGD (million gallons per day)2022
WEST BEND WWTPWest Bend9 MGD (million gallons per day)2022
WHEATON SANITARY DISTRICT - STPWheaton8.9 MGD (million gallons per day)2022
GREENSBURG STPGreensburg8.9 MGD (million gallons per day)2022
RED RIVER TREAT PLTBossier City8.9 MGD (million gallons per day)2022
GREATER HAZLETON STPHazleton8.9 MGD (million gallons per day)2022
Clear Creek WWTFAnderson8.8 MGD (million gallons per day)2022
Covington LAS (Flat Shoals Road WRF)Covington8.8 MGD (million gallons per day)2022
CEDAR FALLS WWTPCedar Falls8.8 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.