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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
DALLAS CITY STPDallas City0.25 MGD (million gallons per day)2022
ASHLEY STPAshley0.25 MGD (million gallons per day)2022
CRAINVILLE STPCarterville0.25 MGD (million gallons per day)2022
TOLONO STPTolono0.24 MGD (million gallons per day)2022
MARINE STPMarine0.24 MGD (million gallons per day)2022
GALATIA STPGalatia0.24 MGD (million gallons per day)2022
ZEIGLER STPZeigler0.24 MGD (million gallons per day)2022
FORRESTON STPForreston0.23 MGD (million gallons per day)2022
COLCHESTER WWTPColchester0.23 MGD (million gallons per day)2022
TREMONT STPTremont0.22 MGD (million gallons per day)2022
ANDALUSIA STPAndalusia0.22 MGD (million gallons per day)2022
ROANOKE STPRoanoke0.22 MGD (million gallons per day)2022
PALESTINE STPPalestine0.22 MGD (million gallons per day)2022
MOWEAQUA STPMoweaqua0.22 MGD (million gallons per day)2022
COULTERVILLE STPCoulterville0.22 MGD (million gallons per day)2022
AVON STPAvon0.22 MGD (million gallons per day)2022
WALNUT STPWalnut0.215 MGD (million gallons per day)2022
MACON STPMacon0.21 MGD (million gallons per day)2022
OAKWOOD STPOakwood0.21 MGD (million gallons per day)2022
GREENFIELD STPGreenfield0.209 MGD (million gallons per day)2022
CERRO GORDO STPCerro Gordo0.2 MGD (million gallons per day)2022
ATWOOD STPAtwood0.2 MGD (million gallons per day)2022
FISHER STPFisher0.2 MGD (million gallons per day)2022
LOVINGTON STPLovington0.2 MGD (million gallons per day)2022
HOPEDALE STPHopedale0.2 MGD (million gallons per day)2022
BDM SEWER COMMISSION STPBuffalo0.2 MGD (million gallons per day)2022
ILLIOPOLIS STWIlliopolis0.2 MGD (million gallons per day)2022
METAMORA NORTH STPMetamora0.2 MGD (million gallons per day)2022
GERMANTOWN HILLS STP #1Germantown Hills0.2 MGD (million gallons per day)2022
GERMANTOWN HILLS WWTP #2Germantown Hills0.2 MGD (million gallons per day)2022
MCLEAN STPMc Lean0.2 MGD (million gallons per day)2022
CAMP POINT STPCamp Point0.2 MGD (million gallons per day)2022
SUMNER STPSumner0.2 MGD (million gallons per day)2022
SHEFFIELD STPSheffield0.2 MGD (million gallons per day)2022
WYANET STPWyanet0.2 MGD (million gallons per day)2022
WAMAC STPCentralia0.2 MGD (million gallons per day)2022
ODIN STPOdin0.2 MGD (million gallons per day)2022
Stillman Valley STP & Coll. SystemStillman Valley0.2 MGD (million gallons per day)2022
JONESBORO STPJonesboro0.2 MGD (million gallons per day)2022
TAMMS WWTPTamms0.2 MGD (million gallons per day)2022
TOLUCA STPToluca0.2 MGD (million gallons per day)2022
RIDGE FARM STPRidge Farm0.2 MGD (million gallons per day)2022
MILLEDGEVILLE STPMilledgeville0.2 MGD (million gallons per day)2022
MILFORD STPMilford0.2 MGD (million gallons per day)2022
ERIE STPErie0.2 MGD (million gallons per day)2022
VIRDEN STP NORTHVirden0.2 MGD (million gallons per day)2022
HINCKLEY STPHinckley0.2 MGD (million gallons per day)2022
MEREDOSIA STPMeredosia0.2 MGD (million gallons per day)2022
BETHANY STPBethany0.2 MGD (million gallons per day)2022
BARRY STPBarry0.2 MGD (million gallons per day)2022
HURST STPHurst0.2 MGD (million gallons per day)2022
RIDGWAY STPRidgway0.19 MGD (million gallons per day)2022
ATLANTA SEWER & STPAtlanta0.19 MGD (million gallons per day)2022
WAYNE CITY STPWayne City0.19 MGD (million gallons per day)2022
HARDIN STPHardin0.19 MGD (million gallons per day)2022
WENONA SEW. TR. PLTWenona0.19 MGD (million gallons per day)2022
GREENUP STPGreenup0.19 MGD (million gallons per day)2022
CHATSWORTH STPChatsworth0.184 MGD (million gallons per day)2022
GRIDLEY STPGridley0.18 MGD (million gallons per day)2022
TOLEDO SEWAGE PLANTToledo0.18 MGD (million gallons per day)2022
SHERRARD STPSherrard0.18 MGD (million gallons per day)2022
ROSSVILLE STPRossville0.18 MGD (million gallons per day)2022
SHANNON SWG TRT PLTShannon0.18 MGD (million gallons per day)2022
BLUE MOUND STPBlue Mound0.18 MGD (million gallons per day)2022
WATERMAN STPWaterman0.18 MGD (million gallons per day)2022
WAVERLY, City ofWaverly0.18 MGD (million gallons per day)2022
BEMENT WTPBement0.18 MGD (million gallons per day)2022
Essex STPEssex0.176 MGD (million gallons per day)2022
CLIFTON STPClifton0.173 MGD (million gallons per day)2022
RAMSEY STPRamsey0.17 MGD (million gallons per day)2022
ATHENS STPAthens0.17 MGD (million gallons per day)2022
CHRISMAN STPChrisman0.17 MGD (million gallons per day)2022
EVANSVILLE STPEvansville0.17 MGD (million gallons per day)2022
DE SOTO STPDe Soto0.17 MGD (million gallons per day)2022
ELKVILLE STPElkville0.17 MGD (million gallons per day)2022
NORTH UTICA STPUtica0.17 MGD (million gallons per day)2022
WARSAW, CITY OFWarsaw0.166 MGD (million gallons per day)2022
MINIER STPMinier0.16 MGD (million gallons per day)2022
ATKINSON STPAtkinson0.16 MGD (million gallons per day)2022
ANNAWAN STPAnnawan0.16 MGD (million gallons per day)2022
ALPHA STPAlpha0.16 MGD (million gallons per day)2022
FRANKLIN GROVE STPFranklin Grove0.16 MGD (million gallons per day)2022
CHADWICK STPChadwick0.16 MGD (million gallons per day)2022
TAMPICO STPTampico0.16 MGD (million gallons per day)2022
TOULON STPToulon0.16 MGD (million gallons per day)2022
GOREVILLE STPGoreville0.16 MGD (million gallons per day)2022
ENERGY STPEnergy0.16 MGD (million gallons per day)2022
WOODLAWN STPWoodlawn0.15 MGD (million gallons per day)2022
WINDSOR SEWERAGE SYSTEMWindsor0.15 MGD (million gallons per day)2022
SOUTH PEKIN STPSouth Pekin0.15 MGD (million gallons per day)2022
CAPRON STPCapron0.15 MGD (million gallons per day)2022
NEW BERLIN SEWERAGENew Berlin0.15 MGD (million gallons per day)2022
PAYSON SEWAGE FACILITYPayson0.15 MGD (million gallons per day)2022
STONINGTON STPStonington0.15 MGD (million gallons per day)2022
HERSCHER STPHerscher0.15 MGD (million gallons per day)2022
Godley, Village ofBraceville0.15 MGD (million gallons per day)2022
PAW PAW STPPaw Paw0.15 MGD (million gallons per day)2022
MARTINSVILLE STPMartinsville0.15 MGD (million gallons per day)2022
MOUND CITY STPMound City0.15 MGD (million gallons per day)2022
LOUISVILLE STPLouisville0.15 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.