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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
GREATER ST ALBANS PSD - THOMAS HOLLOW TPNitro0.344 MGD (million gallons per day)2022
St. Elmo, Village ofAltamont0.343 MGD (million gallons per day)2022
Sonora WWTPSonora0.343 MGD (million gallons per day)2022
OLNEY STPOlney0.342 MGD (million gallons per day)2022
JANESVILLE WWTPJanesville0.341 MGD (million gallons per day)2022
AULANDER WWTPAulander0.341 MGD (million gallons per day)2022
Powder Mountain Water and Sewer Improvement DistrictEden0.341 MGD (million gallons per day)2022
Marmaduke WWTPMarmaduke0.34 MGD (million gallons per day)2022
POPLAR WWTFPorterville0.34 MGD (million gallons per day)2022
Key Colony Beach STPKey Colony Beach0.34 MGD (million gallons per day)2022
Banks County Atlanta International Dragway WPCPCommerce0.34 MGD (million gallons per day)2022
Monticello Pearson Creek WPCPMonticello0.34 MGD (million gallons per day)2022
MINONK STPMinonk0.34 MGD (million gallons per day)2022
LANARK STPLanark0.34 MGD (million gallons per day)2022
BROOKLYN WWTPBrooklyn0.34 MGD (million gallons per day)2022
ALBION WWTPAlbion0.34 MGD (million gallons per day)2022
MEDIAPOLIS STLMediapolis0.34 MGD (million gallons per day)2022
DUSON STPDuson0.34 MGD (million gallons per day)2022
JONESBORO SOUTH PONDJonesboro0.34 MGD (million gallons per day)2022
BETHEL WWTFBethel0.34 MGD (million gallons per day)2022
Bethlehem WWTFBethlehem0.34 MGD (million gallons per day)2022
Woodstock WWTFWoodstock0.34 MGD (million gallons per day)2022
Dillonvale/Mount Pleasant WWSD WWTP and SewersDillonvale0.34 MGD (million gallons per day)2022
Leetonia WWTP & Sewer SystemLeetonia0.34 MGD (million gallons per day)2022
Powhatan Point WWTP & SewersPowhatan Point0.34 MGD (million gallons per day)2022
STIGLER MA WWTStigler0.34 MGD (million gallons per day)2022
AUMSVILLE STPAumsville0.34 MGD (million gallons per day)2022
HUBBARD STPHubbard0.34 MGD (million gallons per day)2022
Harris Co MUD # 130 WWTPHouston0.34 MGD (million gallons per day)2022
MASON CO PSD - LAKIN WWTPPoint Pleasant0.34 MGD (million gallons per day)2022
BEVERLY WWTPBeverly0.34 MGD (million gallons per day)2022
CLINTONVILLE WWTPClintonville0.34 MGD (million gallons per day)2022
DARLINGTON WWTPDarlington0.34 MGD (million gallons per day)2022
CANBY WWTPCanby0.339 MGD (million gallons per day)2022
Ottoville WWTP & Sewer SystemOttoville0.339 MGD (million gallons per day)2022
Slater MariettaMarietta0.339 MGD (million gallons per day)2022
MAHNOMEN WWTPMahnomen0.338 MGD (million gallons per day)2022
Rock Island WWTPRock Island0.338 MGD (million gallons per day)2022
Wrightstown Borough MUA - CS/STPWrightstown0.337 MGD (million gallons per day)2022
Bremen WWTP & Sewer SystemRushville0.336 MGD (million gallons per day)2022
DUNNELLON WWTFDunnellon0.335 MGD (million gallons per day)2022
HAWLEY WWTFHawley0.335 MGD (million gallons per day)2022
GALESVILLE WWTPGalesville0.335 MGD (million gallons per day)2022
GREENE WWTPGreene0.334 MGD (million gallons per day)2022
AUGUSTA WWTPAugusta0.334 MGD (million gallons per day)2022
Town of EltonElton0.333 MGD (million gallons per day)2022
SMITHSBURG WWTPSmithsburg0.333 MGD (million gallons per day)2022
Lead-Deadwood Sanitary DistrictDeadwood0.333 MGD (million gallons per day)2022
Bloomington WWTPBloomington0.333 MGD (million gallons per day)2022
ELROY WWTPElroy0.333 MGD (million gallons per day)2022
Maxwell WWTPMaxwell0.332 MGD (million gallons per day)2022
GARDNER STPGardner0.332 MGD (million gallons per day)2022
SHERBURN WWTPSherburn0.332 MGD (million gallons per day)2022
THORP STPThorp0.331 MGD (million gallons per day)2022
Joseph City SD WWTFJoseph City0.33 MGD (million gallons per day)2022
Woodville WWTFTulare0.33 MGD (million gallons per day)2022
BOWLING GREEN STPBowling Green0.33 MGD (million gallons per day)2022
MORRISONVILLE STPMorrisonville0.33 MGD (million gallons per day)2022
WARREN, VILLAGE OFWarren0.33 MGD (million gallons per day)2022
KOUTS WWTPKouts0.33 MGD (million gallons per day)2022
ADAIR WWTPAdair0.33 MGD (million gallons per day)2022
WINFIELD WWTPWinfield0.33 MGD (million gallons per day)2022
BELLEVUE STPBellevue0.33 MGD (million gallons per day)2022
KUTTAWA SEW PLANTKuttawa0.33 MGD (million gallons per day)2022
ABITA SPRINGS STPAbita Springs0.33 MGD (million gallons per day)2022
IOWA SEWERAGE SYSTEMIowa0.33 MGD (million gallons per day)2022
NORTHEAST HARBOR STPNortheast Harbor0.33 MGD (million gallons per day)2022
MARKEY TWP WWTFHoughton Lake0.33 MGD (million gallons per day)2022
RUSHFORD WWTPRushford0.33 MGD (million gallons per day)2022
RICHTON POTWRichton0.33 MGD (million gallons per day)2022
Lodge of the Four Seasons WWTPLake Ozark0.33 MGD (million gallons per day)2022
Steelville WWTPSteelville0.33 MGD (million gallons per day)2022
Ash Grove WWTPAsh Grove0.33 MGD (million gallons per day)2022
New Haven WWTPNew Haven0.33 MGD (million gallons per day)2022
MADISON WWTPMadison0.33 MGD (million gallons per day)2022
Suffolk (Co) SCSD #26 Greens at Half Hollow STPMelville0.33 MGD (million gallons per day)2022
Union Springs (V) STPUnion Springs0.33 MGD (million gallons per day)2022
RIVER BEND WWTPNew Bern0.33 MGD (million gallons per day)2022
Antwerp WWTP & SewersAntwerp0.33 MGD (million gallons per day)2022
Bellville WWTP & Sewer SystemBellville0.33 MGD (million gallons per day)2022
Stark Co Magnolia WWTPMagnolia0.33 MGD (million gallons per day)2022
BOARDMAN STPBoardman0.33 MGD (million gallons per day)2022
YACHATS STPYachats0.33 MGD (million gallons per day)2022
Cecil Twp STPCanonsburg0.33 MGD (million gallons per day)2022
Bogata WWTPBogata0.33 MGD (million gallons per day)2022
Jourdanton WWTPJourdanton0.33 MGD (million gallons per day)2022
MANTIManti0.33 MGD (million gallons per day)2022
Proctor WWTFProctor0.33 MGD (million gallons per day)2022
FRIDAY HARBOR STPFriday Harbor0.33 MGD (million gallons per day)2022
MULLENS WWTPMullens0.33 MGD (million gallons per day)2022
LA BARGE LAGOONLa Barge0.33 MGD (million gallons per day)2022
WITTENBERG WWTPWittenberg0.328 MGD (million gallons per day)2022
CLARKFIELD WWTPClarkfield0.327 MGD (million gallons per day)2022
CLEAR LAKE STPClear Lake0.327 MGD (million gallons per day)2022
Hunter (V) Sewers & WWTPHunter0.326 MGD (million gallons per day)2022
Memphis WWTPMemphis0.326 MGD (million gallons per day)2022
HILBERT STPHilbert0.326 MGD (million gallons per day)2022
Daleville-Westside WWTPDaleville0.325 MGD (million gallons per day)2022
Woodbury LASWoodbury0.325 MGD (million gallons per day)2022
ARMSTRONG WWTPArmstrong0.325 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.