Clean Water Act discharge permit · NPDES IL0023469
WEST CHICAGO REGIONAL WASTEWATER TREATMENT PLANT, West Chicago, IL: NPDES IL0023469 discharge permit, effluent exceedances, inspections, penalties
- Administratively continuedPermit status
- MajorDischarger class
- 41Pollutants under a numeric limit
- 7Pollutants with an effluent exceedance
WEST CHICAGO REGIONAL WASTEWATER TREATMENT PLANT, held by WEST CHICAGO, CITY OF, holds NPDES permit IL0023469, which discharges to West Branch Of Dupage River. EPA’s file records it issued September 24, 2015 and expiring September 30, 2020. The status and dates are as EPA’s permit file stood when Velarion loaded it (October 14, 2026); EPA’s free Detailed Facility Report on ECHO carries the permit’s current standing.
Identity
| Facility as filed | WEST CHICAGO REGIONAL WASTEWATER TREATMENT PLANT |
|---|---|
| Permittee as filed | WEST CHICAGO, CITY OF |
| NPDES ID | IL0023469 |
| Permit status | Administratively continued (past its expiration date and still in force until reissued) |
| Permit type | Individual permit |
| Discharger class | Major discharger |
| Facility type | Publicly owned treatment works |
| Program | Publicly owned treatment works |
| Issued | September 24, 2015 |
| Expiration date | September 30, 2020 |
| Address | West Chicago, IL 60185 |
| Receiving water | WEST BRANCH OF DUPAGE RIVER |
| Receiving water impaired | 303(D) Listed |
| Subwatershed | Middle West Branch Du Page River (HUC 071200040802) |
| Program components on file | Biosolids, POTW, Pretreatment |
| SIC | 4952 – Sewerage Systems |
Cited to the EPA ICIS-NPDES permit file (ECHO download) and EPA’s NAICS/SIC and component files, the same download.
Effluent limits and exceedances
- 42Pollutants on file
- 41Under a numeric limit
- 10With a violation of any kind
- 7With an effluent exceedance
An effluent exceedance is a discharge monitoring report value over the permit’s numeric limit (EPA’s violation code E90). A violation of any kind also counts a report not filed. Each row is EPA’s own count for that pollutant.
| Pollutant or measure | Limits | Violations, any kind | Effluent exceedances | Latest exceedance | Largest exceedance, as filed |
|---|---|---|---|---|---|
| Coliform, fecal general | 2 | 27 | 25 | August 31, 2025 | 274,900% over the limit |
| Solids, total suspended | 8 | 12 | 11 | April 30, 2014 | 192% over the limit |
| Nitrogen, ammonia total [as N] | 17 | 9 | 9 | May 31, 2025 | 487% over the limit |
| Chlorine, total residual | 3 | 6 | 5 | September 30, 2016 | 720% over the limit |
| BOD, 5-day, 20 deg. C | 2 | 5 | 4 | April 30, 2014 | 293% over the limit |
| Copper, total [as Cu] | 4 | 3 | 3 | August 31, 2013 | 109% over the limit |
| Coliform, fecal - % samples exceeding limit | 0 | 1 | 1 | August 31, 2025 | 130% over the limit |
| pH | 4 | 2 | 0 | ||
| Oxygen, dissolved [DO] | 7 | 1 | 0 | ||
| Flow, total | 1 | 1 | 0 | ||
| Flow, in conduit or thru treatment plant | 6 | 0 | 0 | ||
| BOD, carbonaceous [5 day, 20 C] | 6 | 0 | 0 | ||
| Phosphorus, total [as P] | 5 | 0 | 0 | ||
| Oil & Grease | 4 | 0 | 0 | ||
| Cyanide, total [as CN] | 4 | 0 | 0 | ||
| Cyanide, free [amenable to chlorination] | 4 | 0 | 0 | ||
| Fluoride, total [as F] | 4 | 0 | 0 | ||
| Arsenic, total [as As] | 4 | 0 | 0 | ||
| Barium, total [as Ba] | 4 | 0 | 0 | ||
| Beryllium, total [as Be] | 4 | 0 | 0 | ||
| Cadmium, total [as Cd] | 4 | 0 | 0 | ||
| Chromium, hexavalent [as Cr] | 4 | 0 | 0 | ||
| Chromium, total [as Cr] | 4 | 0 | 0 | ||
| Iron, total [as Fe] | 4 | 0 | 0 | ||
| Iron, dissolved [as Fe] | 4 | 0 | 0 | ||
| Lead, total [as Pb] | 4 | 0 | 0 | ||
| Manganese, total [as Mn] | 4 | 0 | 0 | ||
| Thallium, total [as Tl] | 4 | 0 | 0 | ||
| Nickel, total [as Ni] | 4 | 0 | 0 | ||
| Silver, total [as Ag] | 4 | 0 | 0 | ||
| Zinc, total [as Zn] | 4 | 0 | 0 | ||
| Antimony, total [as Sb] | 4 | 0 | 0 | ||
| Selenium, total [as Se] | 4 | 0 | 0 | ||
| Phenolics, total recoverable | 4 | 0 | 0 | ||
| Mercury, total [as Hg] | 4 | 0 | 0 | ||
| Nitrogen, total [as N] | 2 | 0 | 0 | ||
| Temperature, water deg. fahrenheit | 1 | 0 | 0 | ||
| Alkalinity, total [as CaCO3] | 1 | 0 | 0 | ||
| Nitrogen, Kjeldahl, total [as N] | 1 | 0 | 0 | ||
| Nitrite + Nitrate total [as N] | 1 | 0 | 0 | ||
| Phosphorus, dissolved | 1 | 0 | 0 | ||
| Chloride [as Cl] | 1 | 0 | 0 |
Cited to the EPA ICIS-NPDES limits and effluent violations files (ECHO download); up to 60 rows shown, most exceedances first.
Inspections, violations and enforcement
- 0Single-event violations
EPA’s single-event violation file, as loaded, holds no violation for NPDES IL0023469.
Velarion’s copy of EPA’s ICIS-NPDES files does not include the inspections, formal enforcement actions and informal enforcement actions files, so this page shows none of them. EPA’s free Detailed Facility Report on ECHO lists this permit’s inspections, enforcement actions and penalties.
Cited to the EPA ICIS-NPDES violation, inspection and enforcement files (ECHO download); up to 50 rows of each shown, newest first.
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Figures from EPA’s ICIS-NPDES download, loaded October 14, 2026.