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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
REEDY WWTPReedy0.5 MGD (million gallons per day)2022
CLAYWOOD PARK PSD - NEWARK WWTPParkersburg0.5 MGD (million gallons per day)2022
OCEANA WWTPLynco0.5 MGD (million gallons per day)2022
EDGAR WWTPEdgar0.5 MGD (million gallons per day)2022
HORTONVILLE STPHortonville0.5 MGD (million gallons per day)2022
WEST SALEM WWTPWest Salem0.5 MGD (million gallons per day)2022
NEWCASTLE LAGOONNewcastle0.5 MGD (million gallons per day)2022
GREYBULL LAGOONGreybull0.5 MGD (million gallons per day)2022
BYRON LAGOONByron0.5 MGD (million gallons per day)2022
WRIGHT LAGOONWright0.5 MGD (million gallons per day)2022
COLERAINE-BOVEY-TACONITE WWTFColeraine0.499 MGD (million gallons per day)2022
MOOSE LAKE WWTPMoose Lake0.495 MGD (million gallons per day)2022
Quincy/DeGraff WWTP & Sewer SystemQuincy0.495 MGD (million gallons per day)2022
WESTTOWN TWP STPWesttown0.495 MGD (million gallons per day)2022
Childress WWTPChildress0.495 MGD (million gallons per day)2022
CLINTWOOD STPClintwood0.495 MGD (million gallons per day)2022
WINNECONNE WWTPWinneconne0.495 MGD (million gallons per day)2022
HOTCHKISS WWTPHotchkiss0.494 MGD (million gallons per day)2022
FOSSTON WWTPFosston0.494 MGD (million gallons per day)2022
McArthur WWTP & Sewer SystemMc Arthur0.494 MGD (million gallons per day)2022
Pine Island WWTPSaint James City0.492 MGD (million gallons per day)2022
FLOMATON LAGOONFlomaton0.49 MGD (million gallons per day)2022
REFORM WWTPReform0.49 MGD (million gallons per day)2022
WEST BLOCTON WWTPWest Blocton0.49 MGD (million gallons per day)2022
ISLETON WWTFIsleton0.49 MGD (million gallons per day)2022
Mid Valley Metro DistrictCarbondale0.49 MGD (million gallons per day)2022
CALLAHAN STPCallahan0.49 MGD (million gallons per day)2022
SHAWNEETOWN STPShawneetown0.49 MGD (million gallons per day)2022
MECHANIC FALLS WWTPMechanic Falls0.49 MGD (million gallons per day)2022
Stockbridge Sewerage Collection System and WWTFStockbridge0.49 MGD (million gallons per day)2022
Linn WWTPLinn0.49 MGD (million gallons per day)2022
ROSEBORO WWTPRoseboro0.49 MGD (million gallons per day)2022
Greenfield LagoonGreenfield0.49 MGD (million gallons per day)2022
S. FULTON WWTPSouth Fulton0.49 MGD (million gallons per day)2022
Rolling Fork WWTPHouston0.49 MGD (million gallons per day)2022
ZILLAH TREATMENTZillah0.49 MGD (million gallons per day)2022
PARKERSBURG STLParkersburg0.489 MGD (million gallons per day)2022
HARRISBURG LAGOON TREATMENT PLANTHarrisburg0.489 MGD (million gallons per day)2022
ALTAMONT STP SOUTHAltamont0.488 MGD (million gallons per day)2022
Tidwell Timbers WWTPHouston0.488 MGD (million gallons per day)2022
NEILLSVILLE STPNeillsville0.488 MGD (million gallons per day)2022
CHATFIELD WWTPChatfield0.487 MGD (million gallons per day)2022
PADDOCK LAKE STPSalem0.487 MGD (million gallons per day)2022
VALLEY FALLS WWTPValley Falls0.486 MGD (million gallons per day)2022
CLEAR LAKE / CLEARWATER JOINT WWTFClear Lake0.484 MGD (million gallons per day)2022
St. Johns WWTPSaint Johns0.48 MGD (million gallons per day)2022
SUTTER CREEK WWTFSutter Creek0.48 MGD (million gallons per day)2022
HILLIARD STPHilliard0.48 MGD (million gallons per day)2022
Wrens WPCPWrens0.48 MGD (million gallons per day)2022
Eatonton West WPCPEatonton0.48 MGD (million gallons per day)2022
DePue STPDepue0.48 MGD (million gallons per day)2022
GRIGGSVILLE SEWAGE PLANTGriggsville0.48 MGD (million gallons per day)2022
SHELLSBURG WWTPShellsburg0.48 MGD (million gallons per day)2022
URBANA WWTPUrbana0.48 MGD (million gallons per day)2022
FREDONIA WWTPFredonia0.48 MGD (million gallons per day)2022
ROCK HALL WWTPRock Hall0.48 MGD (million gallons per day)2022
Eastern Correctional Institution WWTPWestover0.48 MGD (million gallons per day)2022
MADISON WWTPMadison0.48 MGD (million gallons per day)2022
COLDWATER POTW SOUTHWESTColdwater0.48 MGD (million gallons per day)2022
Kimberling CityKimberling City0.48 MGD (million gallons per day)2022
Port Henry (V) STPPort Henry0.48 MGD (million gallons per day)2022
Royalton (T) Gasport WWTPGasport0.48 MGD (million gallons per day)2022
Ramseur WWTPRamseur0.48 MGD (million gallons per day)2022
Bradford WWTP & Sewer SystemBradford0.48 MGD (million gallons per day)2022
SPIRO MA WWTSpiro0.48 MGD (million gallons per day)2022
HINES STPHines0.48 MGD (million gallons per day)2022
UPPER ALLEN TWP GRANTHAM WWTPGrantham0.48 MGD (million gallons per day)2022
Friona WWTPFriona0.48 MGD (million gallons per day)2022
Pecan Plantation WWTPPaducah0.48 MGD (million gallons per day)2022
Springtown WWTPSpringtown0.48 MGD (million gallons per day)2022
CARNATION TREATMENTCarnation0.48 MGD (million gallons per day)2022
ELMA STPElma0.48 MGD (million gallons per day)2022
MURFREESBORO WWTPMurfreesboro0.476 MGD (million gallons per day)2022
Chiefland WWTPChiefland0.475 MGD (million gallons per day)2022
Hillsborough WWTFHillsborough0.475 MGD (million gallons per day)2022
Odem South WWTPOdem0.475 MGD (million gallons per day)2022
Cutten Green WWTPHouston0.475 MGD (million gallons per day)2022
Fox Run WWTPSpring0.475 MGD (million gallons per day)2022
North Branch FD1 IDR WWTFWest Dover0.475 MGD (million gallons per day)2022
BLACK CREEK WWTPBlack Creek0.475 MGD (million gallons per day)2022
BOSCOBEL STPBoscobel0.474 MGD (million gallons per day)2022
WEST CONCORD WWTFWest Concord0.473 MGD (million gallons per day)2022
HILLS WWTPHills0.472 MGD (million gallons per day)2022
MOUNT CARMEL WWCSMount Carmel0.472 MGD (million gallons per day)2022
DAWSON WWTPDawson0.471 MGD (million gallons per day)2022
Hamburg WWTPHamburg0.47 MGD (million gallons per day)2022
Wrightsville WWTPWrightsville0.47 MGD (million gallons per day)2022
DOLORES WWTPDolores0.47 MGD (million gallons per day)2022
FREEPORT WWTPFreeport0.47 MGD (million gallons per day)2022
WILLIAMSVILLE STPWilliamsville0.47 MGD (million gallons per day)2022
MASON CITY STPMason City0.47 MGD (million gallons per day)2022
FULTON STPFulton0.47 MGD (million gallons per day)2022
NORTH JUDSON WWTPNorth Judson0.47 MGD (million gallons per day)2022
CROTHERSVILLE WWTPCrothersville0.47 MGD (million gallons per day)2022
SPENCER WWTPSpencer0.47 MGD (million gallons per day)2022
ALMONT WWTPAlmont0.47 MGD (million gallons per day)2022
MCES East Bethel WWTFAndover0.47 MGD (million gallons per day)2022
Moberly Correctional Center WWTFMoberly0.47 MGD (million gallons per day)2022
Warren Township Stage I-II STPWarren0.47 MGD (million gallons per day)2022
OAKRIDGE STPOakridge0.47 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.