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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
West County PlantRichmond12.5 MGD (million gallons per day)2022
Simi Valley WWTPSimi Valley12.5 MGD (million gallons per day)2022
Grand Junction, City ofGrand Junction12.5 MGD (million gallons per day)2022
GREENWICH WPCFGreenwich12.5 MGD (million gallons per day)2022
EAST HARTFORD WPCFEast Hartford12.5 MGD (million gallons per day)2022
WEST HAVEN WPCFWest Haven12.5 MGD (million gallons per day)2022
ALTAMONTE SPGS MAIN STPAltamonte Springs12.5 MGD (million gallons per day)2022
LaGrange WPCPLagrange12.5 MGD (million gallons per day)2022
LAWRENCE KAW RIVER WWTPLawrence12.5 MGD (million gallons per day)2022
MISSOULA WWTPMissoula12.5 MGD (million gallons per day)2022
MONROE WWTPMonroe12.5 MGD (million gallons per day)2022
BROOKFIELD - Fox River WPCCBrookfield12.5 MGD (million gallons per day)2022
Albert Whitted WWTPSaint Petersburg12.4 MGD (million gallons per day)2022
Fitchburg Sewerage Collection System and WWTFFitchburg12.4 MGD (million gallons per day)2022
KINGSPORT STPKingsport12.4 MGD (million gallons per day)2022
Texas City WWTPTexas City12.4 MGD (million gallons per day)2022
Columbia County (Little River WPCP)Evans12.377 MGD (million gallons per day)2022
Jacksonville WWTPJacksonville12.31 MGD (million gallons per day)2022
MIDWEST CITY WWTOklahoma City12.3 MGD (million gallons per day)2022
AMES WWTPAmes12.1 MGD (million gallons per day)2022
Withlacoochee WTPValdosta12.01 MGD (million gallons per day)2022
DOTHAN LITTLE CHOCTAWHATCHEE WWTPDothan12 MGD (million gallons per day)2022
Jefferson County-Cahaba River WWTPBirmingham12 MGD (million gallons per day)2022
Casa Grande WWTFCasa Grande12 MGD (million gallons per day)2022
Yuma Figueroa WPCFYuma12 MGD (million gallons per day)2022
Fort Smith - P Street WWTPFort Smith12 MGD (million gallons per day)2022
North Little Rock - Faulkner LakeNorth Little Rock12 MGD (million gallons per day)2022
Hot Springs - Regional WWTPHot Springs National Park12 MGD (million gallons per day)2022
South Orange County Wastewater Authority (Regional Treatment Plant)Laguna Niguel12 MGD (million gallons per day)2022
Watsonville WWTFWatsonville12 MGD (million gallons per day)2022
LACSD (Palmdale WRP)Palmdale12 MGD (million gallons per day)2022
Chico WPCPChico12 MGD (million gallons per day)2022
Merced WWTPMerced12 MGD (million gallons per day)2022
Pleasant Grove WWTPRoseville12 MGD (million gallons per day)2022
IEUA Carbon Canyon WRFChino12 MGD (million gallons per day)2022
Triview MD WWTPMonument12 MGD (million gallons per day)2022
BROOMFIELD WWTPDenver12 MGD (million gallons per day)2022
BRIDGEPORT EAST SIDEBridgeport12 MGD (million gallons per day)2022
Seacoast Utilities Authority PGA Regional WWTFPalm Beach Gardens12 MGD (million gallons per day)2022
Falkenburg AWTPTampa12 MGD (million gallons per day)2022
FT. MYERS SOUTH AWTPFort Myers12 MGD (million gallons per day)2022
Bee Ridge WRFSarasota12 MGD (million gallons per day)2022
PORT ORANGE WTFPort Orange12 MGD (million gallons per day)2022
Port St. Lucie Glades WWTFPort Saint Lucie12 MGD (million gallons per day)2022
VALRICO REGIONAL STPDover12 MGD (million gallons per day)2022
Flat Creek WRFGainesville12 MGD (million gallons per day)2022
Cobb Noonday Creek WPCPKennesaw12 MGD (million gallons per day)2022
Cobb County Northwest WPCPMarietta12 MGD (million gallons per day)2022
WOODRIDGE, GREEN VALLEY WWTPWoodridge12 MGD (million gallons per day)2022
Flagg Creek Wtr Reclamation DistricHinsdale12 MGD (million gallons per day)2022
MWRDGC, HANOVER PARK WRPHanover Park12 MGD (million gallons per day)2022
NEW ALBANY WWTPNew Albany12 MGD (million gallons per day)2022
MARION WWTPMarion12 MGD (million gallons per day)2022
MICHIGAN CITY STPMichigan City12 MGD (million gallons per day)2022
CLINTON WWTPClinton12 MGD (million gallons per day)2022
TOPEKA NORTH WWTPTopeka12 MGD (million gallons per day)2022
BOWLING GREEN MUNICIPAL UTILITIESBowling Green12 MGD (million gallons per day)2022
BATON ROUGE CENTRAL WWTPBaton Rouge12 MGD (million gallons per day)2022
HOLLAND WTFHolland12 MGD (million gallons per day)2022
BAY CITY STPBay City12 MGD (million gallons per day)2022
Rockaway Valley RSA - CS/STPBoonton12 MGD (million gallons per day)2022
Rome (C) STPRome12 MGD (million gallons per day)2022
Auburn, (C) WWTP & CollectionAuburn12 MGD (million gallons per day)2022
Chemung (Co) Elmira SD Milton WWTPElmira12 MGD (million gallons per day)2022
Jamestown (C) WWTPJamestown12 MGD (million gallons per day)2022
SOUTH BURLINGTON WWTPBurlington12 MGD (million gallons per day)2022
EAST BURLINGTON WWTPBurlington12 MGD (million gallons per day)2022
TRIANGLE WWTPDurham12 MGD (million gallons per day)2022
BIG BUFFALO (SANFORD) WWTPSanford12 MGD (million gallons per day)2022
MCDOWELL CK WWTPHuntersville12 MGD (million gallons per day)2022
NORTH CARY WWTPCary12 MGD (million gallons per day)2022
Mansfield WWTP & Sewer SystemMansfield12 MGD (million gallons per day)2022
Warren Co Lower Little Miami WWTPMaineville12 MGD (million gallons per day)2022
NORMAN (MAIN) WWTNorman12 MGD (million gallons per day)2022
BROKEN ARROW (LYNN LANE) WWTBroken Arrow12 MGD (million gallons per day)2022
JOHNSTOWN CITY STPJohnstown12 MGD (million gallons per day)2022
GALLATIN STPGallatin12 MGD (million gallons per day)2022
Hollywood Road WWTPAmarillo12 MGD (million gallons per day)2022
Fred Hervey WRPFort Bliss12 MGD (million gallons per day)2022
Turkey Creek WWTPHouston12 MGD (million gallons per day)2022
SOUTH DAVIS SD - NORTHWoods Cross12 MGD (million gallons per day)2022
FALLING CREEK WWTPRichmond12 MGD (million gallons per day)2022
MORGANTOWN - STAR CITY WWTPMorgantown12 MGD (million gallons per day)2022
EAU CLAIRE WWTPEau Claire12 MGD (million gallons per day)2022
Westminster Big Dry Creek WWTFWestminster11.9 MGD (million gallons per day)2022
MCES - Eagles Point WWTFCottage Grove11.9 MGD (million gallons per day)2022
NORTH SIDE WWTPKinston11.85 MGD (million gallons per day)2022
TWIN FALLS STPTwin Falls11.84 MGD (million gallons per day)2022
EDMONDS STPEdmonds11.8 MGD (million gallons per day)2022
Rialto WWTPBloomington11.7 MGD (million gallons per day)2022
MERIDEN WPCFMeriden11.6 MGD (million gallons per day)2022
MSD Polk Run Drainage BasinLoveland11.58 MGD (million gallons per day)2022
Franklin WWTF - WRBPFranklin11.54 MGD (million gallons per day)2022
ALBERTVILLE EASTSIDE WWTPAlbertville11.5 MGD (million gallons per day)2022
Glendale West Area WRFGlendale11.5 MGD (million gallons per day)2022
Corona WWTF #1Corona11.5 MGD (million gallons per day)2022
STRATFORD WPCFStratford11.5 MGD (million gallons per day)2022
Denton Creek WWTPRoanoke11.5 MGD (million gallons per day)2022
RICHLAND STPRichland11.4 MGD (million gallons per day)2022
CASEYVILLE TWNSHP (EAST)Caseyville11.39 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.