Clean Water Act discharge permit · NPDES IL0002208
WILL COUNTY GENERATING STATION, Romeoville, IL: NPDES IL0002208 discharge permit, effluent exceedances, inspections, penalties
- Administratively continuedPermit status
- MajorDischarger class
- 29Pollutants under a numeric limit
- 5Pollutants with an effluent exceedance
WILL COUNTY GENERATING STATION, held by MIDWEST GENERATION LLC, holds NPDES permit IL0002208, which discharges to Chicago Sanitary And Ship Canal. EPA’s file records it issued May 15, 2014 and expiring April 30, 2019. 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 | WILL COUNTY GENERATING STATION |
|---|---|
| Permittee as filed | MIDWEST GENERATION LLC |
| NPDES ID | IL0002208 |
| Permit status | Administratively continued (past its expiration date and still in force until reissued) |
| Permit type | Individual permit |
| Discharger class | Major discharger |
| Facility type | Not a publicly owned treatment works |
| Issued | May 15, 2014 |
| Expiration date | April 30, 2019 |
| Address | Romeoville, IL 60441 |
| Receiving water | CHICAGO SANITARY AND SHIP CANAL |
| Receiving water impaired | 303(D) Listed |
| Subwatershed | Maple Lake-Chicago Sanitary and Ship Canal (HUC 071200040705) |
| SIC | 4911 – Electric Services |
| Other EPA IDs (FRS) | RCRA handler ILD000665455; ICIS-AIR source IL000197810AAK |
Cited to the EPA ICIS-NPDES permit file (ECHO download) and EPA’s NAICS/SIC and component files, the same download; cross-program IDs from EPA’s FRS facility-registry crosswalk.
Effluent limits and exceedances
- 29Pollutants on file
- 29Under a numeric limit
- 7With a violation of any kind
- 5With 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 |
|---|---|---|---|---|---|
| Solids, total suspended | 12 | 53 | 3 | April 30, 2003 | 367% over the limit |
| BOD, 5-day, 20 deg. C | 4 | 11 | 3 | May 31, 2011 | 65% over the limit |
| pH | 8 | 3 | 1 | August 31, 2020 | |
| Copper, total [as Cu] | 6 | 1 | 1 | October 31, 2012 | 99,999% over the limit |
| Temperature, water deg. fahrenheit | 4 | 1 | 1 | August 31, 2001 | 1% over the limit |
| Flow, in conduit or thru treatment plant | 14 | 6 | 0 | ||
| Chlorine, total residual | 3 | 2 | 0 | ||
| Mercury, total [as Hg] | 10 | 0 | 0 | ||
| Oil and grease | 8 | 0 | 0 | ||
| Iron, total [as Fe] | 6 | 0 | 0 | ||
| Oil & Grease | 4 | 0 | 0 | ||
| Cyanide, weak acid, dissociable | 4 | 0 | 0 | ||
| Cyanide, total [as CN] | 4 | 0 | 0 | ||
| Fluoride, total [as F] | 4 | 0 | 0 | ||
| Arsenic, total [as As] | 4 | 0 | 0 | ||
| Barium, total [as Ba] | 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, dissolved [as Fe] | 4 | 0 | 0 | ||
| Lead, total [as Pb] | 4 | 0 | 0 | ||
| Manganese, total [as Mn] | 4 | 0 | 0 | ||
| Nickel, total [as Ni] | 4 | 0 | 0 | ||
| Silver, total [as Ag] | 4 | 0 | 0 | ||
| Zinc, total [as Zn] | 4 | 0 | 0 | ||
| Selenium, total [as Se] | 4 | 0 | 0 | ||
| Phenolics, total recoverable | 4 | 0 | 0 | ||
| Month excursion time [min] | 4 | 0 | 0 | ||
| Temperature, length of excursion | 2 | 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 IL0002208.
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.
Watch this permit
One permit holder, $99/month. Watch the register for one permit holder and the places and receiving waters tied to its permits. Choose “One permit holder” and enter this permit’s NPDES ID, IL0002208.
Start the watch
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How we handle your data → Privacy
EPA publishes a free Detailed Facility Report for every permit on ECHO: its compliance status quarter by quarter, its inspections, and its enforcement actions and penalties. EPA also sends free notices of new inspections and enforcement actions through ECHO Notify; enter NPDES ID IL0002208 there.
Nearby on the register
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- Every permit record in Romeoville, A to Z
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- Every permit record in Illinois, A to Z
Figures from EPA’s ICIS-NPDES download, loaded October 14, 2026.