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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
Mapaville State School WWTPMapaville0.008 MGD (million gallons per day)2022
FCPWSD 1 Cardinal Meadows Subd WWTPWashington0.008 MGD (million gallons per day)2022
FCPWSD #3, Martin's FieldVilla Ridge0.008 MGD (million gallons per day)2022
LEWISTON WWTPLewiston0.008 MGD (million gallons per day)2022
DANBURYDanbury0.008 MGD (million gallons per day)2022
SALEM SEPTIC TANKSSalem0.008 MGD (million gallons per day)2022
AYR WWTPAyr0.008 MGD (million gallons per day)2022
WARWICK WASTEWATERWarwick0.008 MGD (million gallons per day)2022
Tuscarawas Co Kerr Allotment WWTPNew Philadelphia0.008 MGD (million gallons per day)2022
Fairfield Co Lakeside Estates WWTPPickerington0.008 MGD (million gallons per day)2022
Defiance Co Middle Gordon Creek WWTP & SewersHicksville0.008 MGD (million gallons per day)2022
Geauga Co Wenhaven WWTPChagrin Falls0.008 MGD (million gallons per day)2022
Auglaize Co Sharlon WWTPNew Knoxville0.008 MGD (million gallons per day)2022
Richland Co Lust Subdivision WWTPMansfield0.008 MGD (million gallons per day)2022
Darke Co Stillwater Golf EstatesVersailles0.008 MGD (million gallons per day)2022
STEPHENS #3 (Meridian) WWTMeridian0.008 MGD (million gallons per day)2022
Elkton Wastewater SystemElkton0.008 MGD (million gallons per day)2022
Carter Lake WSCCollege Station0.008 MGD (million gallons per day)2022
BERK CO PSSD - AUSTIN WWTPMartinsburg0.008 MGD (million gallons per day)2022
BERK CO PSSD - GERRARDSTOWN TPMartinsburg0.008 MGD (million gallons per day)2022
BRADLEY PSD - HOME SCHOOL WWTPBradley0.008 MGD (million gallons per day)2022
RICHMOND SD #1 (St. Croix Co.) STPNew Richmond0.008 MGD (million gallons per day)2022
Seligman WWTFPrescott0.007 MGD (million gallons per day)2022
Pinal County Maricopa HUD WWTPCasa Grande0.007 MGD (million gallons per day)2022
DOUGHERTY WWTPDougherty0.007 MGD (million gallons per day)2022
KINROSS-RUSSWellman0.007 MGD (million gallons per day)2022
THAYER WASTEWATERThayer0.007 MGD (million gallons per day)2022
ELMDALE WWTPElmdale0.007 MGD (million gallons per day)2022
BU CO SD #16 WWTPEl Dorado0.007 MGD (million gallons per day)2022
Sandy Branch Subdivision WWTFHillsboro0.007 MGD (million gallons per day)2022
RICHLAND WWTPSchuyler0.007 MGD (million gallons per day)2022
WATERBURY WWTPWaterbury0.007 MGD (million gallons per day)2022
Putnam (T) STP and SewersPutnam Station0.007 MGD (million gallons per day)2022
CAYUGA WASTEWATERCayuga0.007 MGD (million gallons per day)2022
Union Co Crottinger EstatesPlain City0.007 MGD (million gallons per day)2022
Union Co Tawa Estates WWTPRichwood0.007 MGD (million gallons per day)2022
WARDVILLE RSD WWTWardville0.007 MGD (million gallons per day)2022
OAKWOOD WWTOakwood0.007 MGD (million gallons per day)2022
Kopperl ISD WWTPKopperl0.007 MGD (million gallons per day)2022
Atlantic City STPLander0.007 MGD (million gallons per day)2022
Bairoil - South LagoonBairoil0.007 MGD (million gallons per day)2022
Iguigig LagoonIliamna0.006 MGD (million gallons per day)2022
Lake Cachuma County Park WWTFSanta Barbara0.006 MGD (million gallons per day)2022
Kim, Town ofKim0.006 MGD (million gallons per day)2022
Thistle Community HousingBoulder0.006 MGD (million gallons per day)2022
STARKVILLETrinidad0.006 MGD (million gallons per day)2022
BALLTOWN SEPTIC TANKSSherrill0.006 MGD (million gallons per day)2022
PLANO WWTPPlano0.006 MGD (million gallons per day)2022
RINARD STLFarnhamville0.006 MGD (million gallons per day)2022
SAGEVILLE WASTEWATERDubuque0.006 MGD (million gallons per day)2022
JF CO S D #5 WWTP HICKORY ACRESOskaloosa0.006 MGD (million gallons per day)2022
NEW GERMANY STATE PARKGrantsville0.006 MGD (million gallons per day)2022
Oak Ridge Estates WWTFWarrenton0.006 MGD (million gallons per day)2022
MDYS, Delmina Woods WWTPForsyth0.006 MGD (million gallons per day)2022
Long Branch State ParkMacon0.006 MGD (million gallons per day)2022
KILGORE SEPTIC TANKSKilgore0.006 MGD (million gallons per day)2022
DEWEESE WWTPDeweese0.006 MGD (million gallons per day)2022
OAK WWTPOak0.006 MGD (million gallons per day)2022
ROYAL WWTPRoyal0.006 MGD (million gallons per day)2022
Plattsburgh (T) Cadyville STPCadyville0.006 MGD (million gallons per day)2022
Oswego (T) Sleepy Hollow STPOswego0.006 MGD (million gallons per day)2022
Marion Co Bumford Rd WWTP SD #6AMarion0.006 MGD (million gallons per day)2022
BERK CO PSSD - TOMAHAWK WWTPHedgesville0.006 MGD (million gallons per day)2022
Karluk LagoonKarluk0.005 MGD (million gallons per day)2022
Catamount Metropolitan DistrictSteamboat Springs0.005 MGD (million gallons per day)2022
MT. STERLING-RUSSMount Sterling0.005 MGD (million gallons per day)2022
NICODEMUS I D GRAHAM CO WWTPHill City0.005 MGD (million gallons per day)2022
Glen Arm Maintenance FacilityGlen Arm0.005 MGD (million gallons per day)2022
Camdenton Business Park WWTPCamdenton0.005 MGD (million gallons per day)2022
MODOT Visitor Welcome Center WWTFEagleville0.005 MGD (million gallons per day)2022
Watkins Mill Park Camp WWTFLawson0.005 MGD (million gallons per day)2022
PCPWSD No. 2 Twitty Industrial Park WWTPRolla0.005 MGD (million gallons per day)2022
BCRSD American Outdoor Brands WWTFColumbia0.005 MGD (million gallons per day)2022
PCPWSD No. 2 Tuscan Hills Subd WWTPRolla0.005 MGD (million gallons per day)2022
Piedmont Industrial ParkPiedmont0.005 MGD (million gallons per day)2022
Terry Jean Acres WWTPFenton0.005 MGD (million gallons per day)2022
Allendale WWTFAllendale0.005 MGD (million gallons per day)2022
Johnson's Shut-Ins S.P.Middle Brook0.005 MGD (million gallons per day)2022
JACKSONJackson0.005 MGD (million gallons per day)2022
CRAB ORCHARD WWTPCrab Orchard0.005 MGD (million gallons per day)2022
GILEAD WWTPGilead0.005 MGD (million gallons per day)2022
HALSEY WWTPHalsey0.005 MGD (million gallons per day)2022
BURR WWTPBurr0.005 MGD (million gallons per day)2022
MCLEAN WWTPMclean0.005 MGD (million gallons per day)2022
EMMET WWTPEmmet0.005 MGD (million gallons per day)2022
CHEYENNE CO SID 1 (SIOUX MEADOWS)Sidney0.005 MGD (million gallons per day)2022
LAWTON WASTEWATERLawton0.005 MGD (million gallons per day)2022
FORBES WASTEWATERForbes0.005 MGD (million gallons per day)2022
EGELAND WASTEWATEREgeland0.005 MGD (million gallons per day)2022
KRAMER WASTEWATERKramer0.005 MGD (million gallons per day)2022
Nashville WWTP and SewersNashville0.005 MGD (million gallons per day)2022
Wayne Co Attention Center WWTPWooster0.005 MGD (million gallons per day)2022
Williams Co Hickory Hills WWTPBryan0.005 MGD (million gallons per day)2022
TURNER FALLS PARK (DAVIS)Davis0.005 MGD (million gallons per day)2022
BRADLEY PSD - WALHONDE #2 WWTPBradley0.005 MGD (million gallons per day)2022
BRADLEY PSD - EUNICE WWTPBradley0.005 MGD (million gallons per day)2022
Potosi - CSPotosi0.005 MGD (million gallons per day)2022
Nightmute Tundra PondNightmute0.004 MGD (million gallons per day)2022
Mekoryuk LagoonMekoryuk0.004 MGD (million gallons per day)2022
Mariposa Pines WWTFMariposa0.004 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.