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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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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
NEW MARTINSVILLE WWTPNew Martinsville1.97 MGD (million gallons per day)2022
OCEAN SHORES STPOcean Shores1.96 MGD (million gallons per day)2022
ALEXANDER CITY COLEY CREEK WWTPAlexander City1.95 MGD (million gallons per day)2022
Pearsall WWTPPearsall1.95 MGD (million gallons per day)2022
WORLAND LAGOONWorland1.95 MGD (million gallons per day)2022
STAYTON STPStayton1.94 MGD (million gallons per day)2022
ATTALLA LAGOONAttalla1.93 MGD (million gallons per day)2022
South Kitsap Water Reclamation FacilityPort Orchard1.93 MGD (million gallons per day)2022
CAMBRIDGE WWTPCambridge1.92 MGD (million gallons per day)2022
ASHLAND STPAshland1.92 MGD (million gallons per day)2022
Fountain SDFountain1.908 MGD (million gallons per day)2022
PRINCETON WWTPPrinceton1.905 MGD (million gallons per day)2022
Haines WWTPHaines1.9 MGD (million gallons per day)2022
Pismo Beach, City of (Collection & WWTF)Pismo Beach1.9 MGD (million gallons per day)2022
Brooksville Cobb Road WWTFBrooksville1.9 MGD (million gallons per day)2022
WAUCONDA STPWauconda1.9 MGD (million gallons per day)2022
WASHINGTON WWTPWashington1.9 MGD (million gallons per day)2022
NAPPANEE WWTPNappanee1.9 MGD (million gallons per day)2022
ORANGE CITY WWTPOrange City1.9 MGD (million gallons per day)2022
LAGRANGE STPLa Grange1.9 MGD (million gallons per day)2022
LITTLE FALLS WWTPLittle Falls1.9 MGD (million gallons per day)2022
HAVELOCK WWTPHavelock1.9 MGD (million gallons per day)2022
CROOKED CREEK WWTPMonroe1.9 MGD (million gallons per day)2022
Clyde WWTP & Sewer SystemClyde1.9 MGD (million gallons per day)2022
Bluffton WWTP & SewersBluffton1.9 MGD (million gallons per day)2022
Mahoning Co Campbell WWTPCampbell1.9 MGD (million gallons per day)2022
Eaton WWTP & Sewer SystemEaton1.9 MGD (million gallons per day)2022
CHECOTAH PWA WWTChecotah1.9 MGD (million gallons per day)2022
SOUTH SUBURBAN STPKlamath Falls1.9 MGD (million gallons per day)2022
ERWIN STPErwin1.9 MGD (million gallons per day)2022
PORTLAND STPPortland1.9 MGD (million gallons per day)2022
Dumas WWTPDumas1.9 MGD (million gallons per day)2022
Pecan Grove WWTPSugar Land1.9 MGD (million gallons per day)2022
UNION PSD - ROCKY FORK WWTPNitro1.9 MGD (million gallons per day)2022
MALDEN PSD WWTPCharleston1.895 MGD (million gallons per day)2022
Vidalia Swift Creek WPCPVidalia1.88 MGD (million gallons per day)2022
SHENANDOAH WWTPShenandoah1.88 MGD (million gallons per day)2022
Savannah STPSavannah1.88 MGD (million gallons per day)2022
PORT ARANSAS STPPort Aransas1.88 MGD (million gallons per day)2022
Lamesa WWTPLamesa1.88 MGD (million gallons per day)2022
Glenwood State Fish Hatchery NMDGFGlenwood1.879 MGD (million gallons per day)2022
Pennsville Township SA - CS/STPPennsville1.875 MGD (million gallons per day)2022
Portage Co Franklin Hills WWTPKent1.875 MGD (million gallons per day)2022
KANAWHA FALLS PSD WWTPGauley Bridge1.875 MGD (million gallons per day)2022
NITRO WWTPNitro1.875 MGD (million gallons per day)2022
Troy Southeast WWTPTroy1.87 MGD (million gallons per day)2022
WOODWARD WWTWoodward1.87 MGD (million gallons per day)2022
HUGO MUNICIPAL AUTHORITY WWTHugo1.87 MGD (million gallons per day)2022
LaFollette STPLa Follette1.87 MGD (million gallons per day)2022
Crescent City WWTFCrescent City1.86 MGD (million gallons per day)2022
HARBOR SPRINGS CITY STPHarbor Springs1.86 MGD (million gallons per day)2022
Valdez Aerated LagoonValdez1.85 MGD (million gallons per day)2022
WEST BURLINGTON WWTPWest Burlington1.85 MGD (million gallons per day)2022
MILAN WWTPMilan1.85 MGD (million gallons per day)2022
CHELSEA STPChelsea1.85 MGD (million gallons per day)2022
Little Creek WWTP (Zebulon)Zebulon1.85 MGD (million gallons per day)2022
MOLALLA STPMolalla1.85 MGD (million gallons per day)2022
MEDICAL LAKE STPMedical Lake1.85 MGD (million gallons per day)2022
LE SUEUR WWTPLe Sueur1.842 MGD (million gallons per day)2022
Montague Sewerage Collection System and WPCFMontague1.83 MGD (million gallons per day)2022
NEW PRAGUE WWTPNew Prague1.83 MGD (million gallons per day)2022
WINDOM WWTPWindom1.83 MGD (million gallons per day)2022
ARKANSAS CITY WWTPArkansas City1.82 MGD (million gallons per day)2022
LONG PRAIRIE WWTPLong Prairie1.82 MGD (million gallons per day)2022
HERRIN STPHerrin1.81 MGD (million gallons per day)2022
Chardon WWTP & Sewer SystemChardon1.81 MGD (million gallons per day)2022
OCONTO WWTPOconto1.81 MGD (million gallons per day)2022
Sitka WWTPSitka1.8 MGD (million gallons per day)2022
Somerton WWTFSomerton1.8 MGD (million gallons per day)2022
Surprise SPA3 WRFSurprise1.8 MGD (million gallons per day)2022
Greenwood WWTPGreenwood1.8 MGD (million gallons per day)2022
FILLMORE WWTFFillmore1.8 MGD (million gallons per day)2022
Chowchilla WWTPChowchilla1.8 MGD (million gallons per day)2022
Hughson WWTFHughson1.8 MGD (million gallons per day)2022
PUEBLO WEST WRF #1Pueblo1.8 MGD (million gallons per day)2022
Cape Canaveral WRFCape Canaveral1.8 MGD (million gallons per day)2022
Sugarcreek WPCPEastman1.8 MGD (million gallons per day)2022
HARVARD STPHarvard1.8 MGD (million gallons per day)2022
Huntley, East PlantHuntley1.8 MGD (million gallons per day)2022
MARENGO STPMarengo1.8 MGD (million gallons per day)2022
CHANDLER STPChandler1.8 MGD (million gallons per day)2022
CONNERSVILLE WWTPConnersville1.8 MGD (million gallons per day)2022
WINCHESTER WWTPWinchester1.8 MGD (million gallons per day)2022
LAGRANGE WWTPLagrange1.8 MGD (million gallons per day)2022
YOUNGSVILLE STPYoungsville1.8 MGD (million gallons per day)2022
Trout Run WWTP & Coll. Sys.Oakland1.8 MGD (million gallons per day)2022
Ipswich Sewerage Collection System and WWTFIpswich1.8 MGD (million gallons per day)2022
CHARLOTTE WWTPCharlotte1.8 MGD (million gallons per day)2022
FRANKENMUTH STPFrankenmuth1.8 MGD (million gallons per day)2022
BERLIN TWP STPNewport1.8 MGD (million gallons per day)2022
Pevely WWTPPevely1.8 MGD (million gallons per day)2022
Dexter East WWTPDexter1.8 MGD (million gallons per day)2022
Perryville WWTPPerryville1.8 MGD (million gallons per day)2022
Seabrook WWTFSeabrook1.8 MGD (million gallons per day)2022
Oyster Bay (T) Sewer DistrictOyster Bay1.8 MGD (million gallons per day)2022
Suffern (V) STPSuffern1.8 MGD (million gallons per day)2022
Cobleskill (V) STPCobleskill1.8 MGD (million gallons per day)2022
Penn Yan (V) STPPenn Yan1.8 MGD (million gallons per day)2022
ROBERSONVILLE WWTPRobersonville1.8 MGD (million gallons per day)2022
Yadkin Valley Sewer Authority WWTPElkin1.8 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.