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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
CHEYENNE CROWCREEK WWTPCheyenne6.5 MGD (million gallons per day)2022
Cleburne WWTPCleburne6.49 MGD (million gallons per day)2022
West Memorial WWTPKaty6.48 MGD (million gallons per day)2022
Poplar Bluff Municipal WWTPPoplar Bluff6.46 MGD (million gallons per day)2022
STORM LAKE WWTPStorm Lake6.45 MGD (million gallons per day)2022
HATFIELD TWP STPColmar6.43 MGD (million gallons per day)2022
Oquina Creek WPCPThomasville6.4 MGD (million gallons per day)2022
West Memphis WWTPWest Memphis6.3 MGD (million gallons per day)2022
CMCMUA - Ocean City Regional WWTFOcean City6.3 MGD (million gallons per day)2022
Farmington, City ofFarmington6.3 MGD (million gallons per day)2022
Barberton WWTP & Sewer SystemBarberton6.3 MGD (million gallons per day)2022
SWATARA TWP AUTHHummelstown6.3 MGD (million gallons per day)2022
Woodforest Road WWTPHouston6.3 MGD (million gallons per day)2022
South Lake Granbury WWTPGranbury6.26 MGD (million gallons per day)2022
WASHINGTON WWTPWashington6.24 MGD (million gallons per day)2022
Niles WWTP & Sewer SystemNiles6.22 MGD (million gallons per day)2022
Lake Charles Plant B/CLake Charles6.2 MGD (million gallons per day)2022
Ballenger/McKinney WWTPFrederick6.2 MGD (million gallons per day)2022
MARQUETTE WWTPMarquette6.2 MGD (million gallons per day)2022
HIGH POINT WESTSIDE WWTPThomasville6.2 MGD (million gallons per day)2022
Central District WWTP - BaytownBaytown6.2 MGD (million gallons per day)2022
O J Riedel WWTPCibolo6.2 MGD (million gallons per day)2022
GADSDEN EAST WWTPGadsden6.184 MGD (million gallons per day)2022
Sagemont WWTPHouston6.14 MGD (million gallons per day)2022
Portsmouth WWTFPortsmouth6.13 MGD (million gallons per day)2022
Herkimer (Co) WWTPMohawk6.1 MGD (million gallons per day)2022
Camas Wastewater Treatment PlantCamas6.1 MGD (million gallons per day)2022
Twinsburg WWTP & Sewer SystemTwinsburg6.071 MGD (million gallons per day)2022
MOUNT VERNON TREATMENTMount Vernon6.037 MGD (million gallons per day)2022
Huntsville Big Cove WWTPHuntsville6 MGD (million gallons per day)2022
SELMA VALLEY CREEK WWTPSelma6 MGD (million gallons per day)2022
Phenix City WWTPPhenix City6 MGD (million gallons per day)2022
Flagstaff Wildcat Hill WWTFFlagstaff6 MGD (million gallons per day)2022
Goodyear 157th Ave WWRFGoodyear6 MGD (million gallons per day)2022
Prescott Sundog WWTFPrescott6 MGD (million gallons per day)2022
Conway - Stone Dam Creek WWTPConway6 MGD (million gallons per day)2022
Paragould WWTPParagould6 MGD (million gallons per day)2022
Cabot WWTPCabot6 MGD (million gallons per day)2022
SAUSALITO-MARIN CITY WWTFSausalito6 MGD (million gallons per day)2022
Atwater Regional Wastewater Treatment FacilityAtwater6 MGD (million gallons per day)2022
Hesperia WRP SystemHesperia6 MGD (million gallons per day)2022
East Valley Water DistrictSan Bernardino6 MGD (million gallons per day)2022
El Toro Water District (Water Reclamation Plant)Laguna Woods6 MGD (million gallons per day)2022
MNWD WWTP 3ALaguna Niguel6 MGD (million gallons per day)2022
Fort Collins Mulberry WW FacilityFort Collins6 MGD (million gallons per day)2022
ST VRAIN SDLongmont6 MGD (million gallons per day)2022
Dunedin AWWTPDunedin6 MGD (million gallons per day)2022
Cocoa Beach WRFCocoa Beach6 MGD (million gallons per day)2022
BCUD/SYKES CREEK REGIONALWWTFMerritt Island6 MGD (million gallons per day)2022
IRCUD/West WWTFVero Beach6 MGD (million gallons per day)2022
Fort Myers Beach WWTPFort Myers Beach6 MGD (million gallons per day)2022
Three Oaks WWTPFort Myers6 MGD (million gallons per day)2022
Wesley Center subregional WWTFWesley Chapel6 MGD (million gallons per day)2022
Blacks Ford WRFJacksonville6 MGD (million gallons per day)2022
DELAND REGIONAL WWTPDeland6 MGD (million gallons per day)2022
Sandhill WWTPKissimmee6 MGD (million gallons per day)2022
Port St. Lucie Westport WWTFPort Saint Lucie6 MGD (million gallons per day)2022
Cherokee County (Rose Creek WPCP)Woodstock6 MGD (million gallons per day)2022
Northeast Clayton WRFRex6 MGD (million gallons per day)2022
Douglas Southeast WPCPDouglas6 MGD (million gallons per day)2022
City of DublinDublin6 MGD (million gallons per day)2022
Rockdale County Quigg Branch WPCPConyers6 MGD (million gallons per day)2022
South Central WPCPDouglasville6 MGD (million gallons per day)2022
CARBONDALE SEWWTPCarbondale6 MGD (million gallons per day)2022
Lake County DPW, New Century TownVernon Hills6 MGD (million gallons per day)2022
BLUFFTON WWTPBluffton6 MGD (million gallons per day)2022
Lawrenceburg WWTPLawrenceburg6 MGD (million gallons per day)2022
Warsaw WWTPWarsaw6 MGD (million gallons per day)2022
SOUTH DEARBORN COUNTY RSDAurora6 MGD (million gallons per day)2022
WICHITA WWT #4 (FOUR MILE CREEK)Wichita6 MGD (million gallons per day)2022
PITTSBURG WWTPPittsburg6 MGD (million gallons per day)2022
GARDEN CITY WWTPGarden City6 MGD (million gallons per day)2022
MSD - HITE CREEK STPLouisville6 MGD (million gallons per day)2022
GLASGOWGlasgow6 MGD (million gallons per day)2022
HWEA - Hammond Wood STPHopkinsville6 MGD (million gallons per day)2022
MADISONVILLE STP& CSMadisonville6 MGD (million gallons per day)2022
Hardin Co Water Dist. #1-Fort KnoxFort Knox6 MGD (million gallons per day)2022
DestrehanDestrehan6 MGD (million gallons per day)2022
AMBASSADOR CAFFERY STPLafayette6 MGD (million gallons per day)2022
NEW IBERIA STPNew Iberia6 MGD (million gallons per day)2022
TERRACE AVE PLANTSlidell6 MGD (million gallons per day)2022
KENNEBEC WWTPWaterville6 MGD (million gallons per day)2022
BROADNECK WWTPAnnapolis6 MGD (million gallons per day)2022
Marlay-Taylor WRFLexington Park6 MGD (million gallons per day)2022
Webster Sewerage Collection System and WWTFWebster6 MGD (million gallons per day)2022
DELTA TWP WWTPLansing6 MGD (million gallons per day)2022
MT CLEMENS WWTPMount Clemens6 MGD (million gallons per day)2022
OWOSSO WWTPOwosso6 MGD (million gallons per day)2022
BEDFORD TOWNSHIP STPErie6 MGD (million gallons per day)2022
BRAINERD-BAXTER WWTPBaxter6 MGD (million gallons per day)2022
Monett WWTPMonett6 MGD (million gallons per day)2022
BOZEMAN WWTPBozeman6 MGD (million gallons per day)2022
HELENA WWTPHelena6 MGD (million gallons per day)2022
Keene WWTFKeene6 MGD (million gallons per day)2022
Beacon (C) WPCPBeacon6 MGD (million gallons per day)2022
Orange, (Co) SD #1Harriman6 MGD (million gallons per day)2022
Westchester (Co)Port Chester SD STPPort Chester6 MGD (million gallons per day)2022
Colonie (T) Mohawk River WPCPLatham6 MGD (million gallons per day)2022
Bethlehem (T) Cedar Hill STPSelkirk6 MGD (million gallons per day)2022
Geneva (C) Marsh Creek WWTPGeneva6 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.