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World wastewater treatment plant observatory · data as reported by each inventory

Wastewater treatment plants in United States · Illinois

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766 inventory records · EPA Clean Watersheds Needs Survey 2022

Data years: 2022. The inventory date does not establish current operation.

766 results

CompareNameNative sizeYear
HANOVER STPHanover0.15 MGD (million gallons per day)2022
ASHLAND STPAshland0.15 MGD (million gallons per day)2022
BROOKPORT STPBrookport0.15 MGD (million gallons per day)2022
VIENNA STPVienna0.15 MGD (million gallons per day)2022
OAKLAND STPOakland0.15 MGD (million gallons per day)2022
LIVINGSTON STPLivingston0.148 MGD (million gallons per day)2022
Homer Wastewater SystemHomer0.147 MGD (million gallons per day)2022
KINMUNDY STPKinmundy0.146 MGD (million gallons per day)2022
MACKINAW, VILLAGE OFMackinaw0.145 MGD (million gallons per day)2022
ALEXIS, STPAlexis0.14 MGD (million gallons per day)2022
GERMANTOWN STPGermantown0.14 MGD (million gallons per day)2022
BLUFFS STPBluffs0.14 MGD (million gallons per day)2022
GIFFORD SEWAGE TREATMENTGifford0.14 MGD (million gallons per day)2022
ST JACOB STPSaint Jacob0.14 MGD (million gallons per day)2022
DIVERNON TREATMENT FACILITYDivernon0.14 MGD (million gallons per day)2022
BRIMFIELD SDBrimfield0.14 MGD (million gallons per day)2022
DANVERS STPDanvers0.14 MGD (million gallons per day)2022
COBDEN STPCobden0.14 MGD (million gallons per day)2022
ALBANY SAN DISTAlbany0.14 MGD (million gallons per day)2022
DUNFERMLINE STPSaint David0.14 MGD (million gallons per day)2022
KIRKWOOD, STPKirkwood0.132 MGD (million gallons per day)2022
FLANAGAN STPFlanagan0.13 MGD (million gallons per day)2022
DEER CREEK STPDeer Creek0.13 MGD (million gallons per day)2022
ST. FRANCESVILLE STPSaint Francisville0.13 MGD (million gallons per day)2022
DONGOLA STPDongola0.13 MGD (million gallons per day)2022
Wonder Lake STPWonder Lake0.13 MGD (million gallons per day)2022
WITT STPWitt0.13 MGD (million gallons per day)2022
ONEIDA SOUTH LAGOONOneida0.13 MGD (million gallons per day)2022
ROYALTON STPRoyalton0.13 MGD (million gallons per day)2022
BECKEMEYER STPBeckemeyer0.13 MGD (million gallons per day)2022
PLEASANT HILL WWTPPleasant Hill0.13 MGD (million gallons per day)2022
WASHBURN SEWER & STPWashburn0.124 MGD (million gallons per day)2022
CLAY CITY STPClay City0.12 MGD (million gallons per day)2022
WORDEN WASTEWATER TR SYSWorden0.12 MGD (million gallons per day)2022
GREEN VALLEY STPGreen Valley0.12 MGD (million gallons per day)2022
MENDON STPMendon0.12 MGD (million gallons per day)2022
FINDLAY STPFindlay0.12 MGD (million gallons per day)2022
ODELL WWTPOdell0.12 MGD (million gallons per day)2022
FARMERSVILLE STPFarmersville0.12 MGD (million gallons per day)2022
CISSNA PARK STWCissna Park0.12 MGD (million gallons per day)2022
ONEIDA NORTH LAGOONOneida0.12 MGD (million gallons per day)2022
YATES CITY LAGOON NORTHYates City0.12 MGD (million gallons per day)2022
PALMYRA STPPalmyra0.12 MGD (million gallons per day)2022
AVISTON STPAviston0.12 MGD (million gallons per day)2022
SHABBONA STPShabbona0.12 MGD (million gallons per day)2022
VERMONT STPVermont0.12 MGD (million gallons per day)2022
HULL STPHull0.12 MGD (million gallons per day)2022
TILDEN STPTilden0.111 MGD (million gallons per day)2022
PERCY SEWAGE LAGOONPercy0.11 MGD (million gallons per day)2022
COLFAX STPColfax0.11 MGD (million gallons per day)2022
PLAINVILLE STPPlainville0.11 MGD (million gallons per day)2022
DALZELL STPDalzell0.11 MGD (million gallons per day)2022
VIOLA STPViola0.11 MGD (million gallons per day)2022
FARINA S.T.PFarina0.11 MGD (million gallons per day)2022
Adams County Water DistrictPaloma0.11 MGD (million gallons per day)2022
STEWARDSON STPStewardson0.11 MGD (million gallons per day)2022
NEWARK STPNewark0.11 MGD (million gallons per day)2022
WATAGA STP-NORTHWataga0.11 MGD (million gallons per day)2022
WAYNESVILLEWaynesville0.11 MGD (million gallons per day)2022
Neponset WastewaterNeponset0.108 MGD (million gallons per day)2022
NEWMAN STPNewman0.107 MGD (million gallons per day)2022
SPARLAND STPSparland0.105 MGD (million gallons per day)2022
Bayles LakeLoda0.105 MGD (million gallons per day)2022
GOLCONDA STWGolconda0.1 MGD (million gallons per day)2022
RAYMOND WWTPRaymond0.1 MGD (million gallons per day)2022
POPLAR GROVE NORTH SEWAGE TREATPoplar Grove0.1 MGD (million gallons per day)2022
NIANTIC STPNiantic0.1 MGD (million gallons per day)2022
NORDIC STPItasca0.1 MGD (million gallons per day)2022
CLAYTON WWTPClayton0.1 MGD (million gallons per day)2022
KEITHSBURG STPKeithsburg0.1 MGD (million gallons per day)2022
BROWNSTOWN STPBrownstown0.1 MGD (million gallons per day)2022
STRONGHURST STPStronghurst0.1 MGD (million gallons per day)2022
Pearl WastewaterPearl City0.1 MGD (million gallons per day)2022
Spoon Valley Lake Sanitary DistrictDahinda0.1 MGD (million gallons per day)2022
Lost Lake Utility District, WWTPDixon0.1 MGD (million gallons per day)2022
TOWER HILL STPTower Hill0.1 MGD (million gallons per day)2022
POCAHONTAS STPPocahontas0.1 MGD (million gallons per day)2022
COFFEEN STPCoffeen0.1 MGD (million gallons per day)2022
ELIZABETH SWG TRT PLTElizabeth0.1 MGD (million gallons per day)2022
CHAPIN STPChapin0.1 MGD (million gallons per day)2022
FRANKLIN, Village ofFranklin0.1 MGD (million gallons per day)2022
WEST SALEM NO. LAGOONWest Salem0.1 MGD (million gallons per day)2022
PRAIRIE DU ROCHER STPPrairie Du Rocher0.1 MGD (million gallons per day)2022
CEDARVILLE STPCedarville0.1 MGD (million gallons per day)2022
DAKOTA STPDakota0.1 MGD (million gallons per day)2022
ALTAMONT STP NORTHAltamont0.1 MGD (million gallons per day)2022
NOBLE STPNoble0.1 MGD (million gallons per day)2022
TONICA STPTonica0.1 MGD (million gallons per day)2022
CEDAR POINT WWTPCedar Point0.1 MGD (million gallons per day)2022
CREAL SPRINGS STPCreal Springs0.1 MGD (million gallons per day)2022
Peoria SD - Dunlap PlantDunlap0.095 MGD (million gallons per day)2022
MAZON STPMazon0.095 MGD (million gallons per day)2022
MURRAYVILLE STPMurrayville0.095 MGD (million gallons per day)2022
IPAVA STPIpava0.094 MGD (million gallons per day)2022
VALMEYER STPValmeyer0.094 MGD (million gallons per day)2022
MATHERVILLE STPMatherville0.093 MGD (million gallons per day)2022
AUGUSTA STPAugusta0.093 MGD (million gallons per day)2022
Pleasant Plains WTPPleasant Plains0.092 MGD (million gallons per day)2022
WILLISVILLE SEWAGE TREATMWillisville0.09 MGD (million gallons per day)2022
OGDEN WWTPOgden0.09 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.