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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
LOWELL STPLowell0.04 MGD (million gallons per day)2022
Drummond SD #1 - WWTPDrummond0.04 MGD (million gallons per day)2022
ELK MOUNTAIN LAGOONElk Mountain0.04 MGD (million gallons per day)2022
CLEARMONT LAGOONClearmont0.04 MGD (million gallons per day)2022
YODER LAGOONYoder0.04 MGD (million gallons per day)2022
BURNS LAGOONBurns0.04 MGD (million gallons per day)2022
CENTENNIAL LAGOONCentennial0.04 MGD (million gallons per day)2022
Larimer County - CSU Mountain CampusBellvue0.039 MGD (million gallons per day)2022
ADVANCE WWTPAdvance0.039 MGD (million gallons per day)2022
ROBINSON WWTPRobinson0.039 MGD (million gallons per day)2022
GRINNEL WWTPGrinnell0.039 MGD (million gallons per day)2022
Royalston Sewerage Collection System and WWTFRoyalston0.039 MGD (million gallons per day)2022
RACINE WWTPRacine0.039 MGD (million gallons per day)2022
East Lynne WWTPEast Lynne0.039 MGD (million gallons per day)2022
Renick WWTPRenick0.039 MGD (million gallons per day)2022
Clarksdale WWTPClarksdale0.039 MGD (million gallons per day)2022
Washburn WWTFWashburn0.039 MGD (million gallons per day)2022
New Cambria WWTPNew Cambria0.039 MGD (million gallons per day)2022
Lake Arthur, Town ofLake Arthur0.039 MGD (million gallons per day)2022
GOLTRY WWTGoltry0.039 MGD (million gallons per day)2022
MILBURN WWTMilburn0.039 MGD (million gallons per day)2022
LENAPAH PWA WWTLenapah0.039 MGD (million gallons per day)2022
Divide MPC Metropolitan District No. 1 and No. 2Divide0.038 MGD (million gallons per day)2022
Iliff, Town ofIliff0.038 MGD (million gallons per day)2022
CAMBRIDGE SEWAGE LAGOONCambridge0.038 MGD (million gallons per day)2022
MILL SHOALS WWTPMill Shoals0.038 MGD (million gallons per day)2022
BARNUM STLBarnum0.038 MGD (million gallons per day)2022
BODE STLBode0.038 MGD (million gallons per day)2022
MOORHEAD WWTPMoorhead0.038 MGD (million gallons per day)2022
MORROWVILLE WWTPMorrowville0.038 MGD (million gallons per day)2022
BELVUE WWTPBelvue0.038 MGD (million gallons per day)2022
WALTON WWTPWalton0.038 MGD (million gallons per day)2022
GRIDLEY WWTPGridley0.038 MGD (million gallons per day)2022
PRESCOTT WWTPPrescott0.038 MGD (million gallons per day)2022
GRASSTON WWTPGrasston0.038 MGD (million gallons per day)2022
Rosebud South WWTPRosebud0.038 MGD (million gallons per day)2022
GRASS RANGE WWTFGreat Falls0.038 MGD (million gallons per day)2022
ALLEN WWTPAllen0.038 MGD (million gallons per day)2022
Dutchess (Co) Valley Dale STPPleasant Valley0.038 MGD (million gallons per day)2022
Thompson (T) Melody Lake SD STPMonticello0.038 MGD (million gallons per day)2022
Marengo WWTP & Sewer SystemMarengo0.038 MGD (million gallons per day)2022
MANNFORD PWA EAST WWTMannford0.038 MGD (million gallons per day)2022
BENNINGTON WWTBennington0.038 MGD (million gallons per day)2022
Ropesville WWTPRopesville0.038 MGD (million gallons per day)2022
Covington WWTPCovington0.038 MGD (million gallons per day)2022
Bellvue WWTPBellevue0.038 MGD (million gallons per day)2022
Orangefield WWTPOrangefield0.038 MGD (million gallons per day)2022
CONCRETE STPConcrete0.038 MGD (million gallons per day)2022
Shawano Co. Utilities - WWTPShawano0.038 MGD (million gallons per day)2022
MATTOON WWTPMattoon0.038 MGD (million gallons per day)2022
KIT CARSON WWTPKit Carson0.037 MGD (million gallons per day)2022
McNabb, Village ofMc Nabb0.037 MGD (million gallons per day)2022
Pine VillagePine Village0.037 MGD (million gallons per day)2022
Briarwood WWTPBedford0.037 MGD (million gallons per day)2022
LITTLE SIOUX STPLittle Sioux0.037 MGD (million gallons per day)2022
Goose Lake STLGoose Lake0.037 MGD (million gallons per day)2022
DIAGONAL STLDiagonal0.037 MGD (million gallons per day)2022
FORT ATKINSON SEPTICSFort Atkinson0.037 MGD (million gallons per day)2022
JF CO S D #6 LAKE SH EST WWTPOzawkie0.037 MGD (million gallons per day)2022
BROOKVILLE WWTPBrookville0.037 MGD (million gallons per day)2022
MORLAND WWTPMorland0.037 MGD (million gallons per day)2022
RANSOM WWTPRansom0.037 MGD (million gallons per day)2022
EVERGREEN WWTPEvergreen0.037 MGD (million gallons per day)2022
PLUMMER WWTPPlummer0.037 MGD (million gallons per day)2022
Clearmont WWTFClearmont0.037 MGD (million gallons per day)2022
Oak Ridge WWTPOak Ridge0.037 MGD (million gallons per day)2022
Clifton (T) SewersCranberry Lake0.037 MGD (million gallons per day)2022
Seneca Lake Marina Point Collection, Lift Station, and WWTPSenecaville0.037 MGD (million gallons per day)2022
BURNETT SD #1 STPBurnett0.037 MGD (million gallons per day)2022
Banks WWTPBanks0.036 MGD (million gallons per day)2022
Ravenden Springs WWTPRavenden Springs0.036 MGD (million gallons per day)2022
LOG CABIN RANCH WWTFSan Francisco0.036 MGD (million gallons per day)2022
COAL CREEKCoal Creek0.036 MGD (million gallons per day)2022
SWITZ CITY WWTPSwitz City0.036 MGD (million gallons per day)2022
HOLTON WWTPHolton0.036 MGD (million gallons per day)2022
St. Joseph County RWSDWyatt0.036 MGD (million gallons per day)2022
DEEP RIVER STLDeep River0.036 MGD (million gallons per day)2022
HARCOURT WWTPHarcourt0.036 MGD (million gallons per day)2022
IONIA WWTPIonia0.036 MGD (million gallons per day)2022
FAIRVIEW WWTPFairview0.036 MGD (million gallons per day)2022
CORINTH STPCorinth0.036 MGD (million gallons per day)2022
Vesta WWTPVesta0.036 MGD (million gallons per day)2022
HARDWICK WWTPHardwick0.036 MGD (million gallons per day)2022
FREEBORN WWTPFreeborn0.036 MGD (million gallons per day)2022
Utica WWTFUtica0.036 MGD (million gallons per day)2022
Fairview WWTFFairview0.036 MGD (million gallons per day)2022
Fillmore WWTFFillmore0.036 MGD (million gallons per day)2022
Creighton WWTPCreighton0.036 MGD (million gallons per day)2022
FCPWSD #1, Twin LakesUnion0.036 MGD (million gallons per day)2022
New Hampton WWTPNew Hampton0.036 MGD (million gallons per day)2022
AUGUSTA W & S DistrictAugusta0.036 MGD (million gallons per day)2022
BROCKTON LAGOONBrockton0.036 MGD (million gallons per day)2022
LaCasa Grande Water and Sewer DistrictEast Helena0.036 MGD (million gallons per day)2022
CAMPBELL WWTPCampbell0.036 MGD (million gallons per day)2022
Wayne Co Lake Harmony WWTPDalton0.036 MGD (million gallons per day)2022
Hoytville WWTP & Sewer SystemHoytville0.036 MGD (million gallons per day)2022
Roan Mtn. SP STPRoan Mountain0.036 MGD (million gallons per day)2022
Mount Calm WWTPMount Calm0.036 MGD (million gallons per day)2022
UNIONTOWN STPUniontown0.036 MGD (million gallons per day)2022
LYLE POTWLyle0.036 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.