Clean Water Act discharge permit · NPDES IL0045241
INEOS US CHEMICALS COMPANY-NAPERVILLE CAMPUS, Naperville, IL: NPDES IL0045241 discharge permit, effluent exceedances, inspections, penalties
- Administratively continuedPermit status
- MinorDischarger class
- 2Pollutants under a numeric limit
- 3Pollutants with an effluent exceedance
INEOS US CHEMICALS COMPANY-NAPERVILLE CAMPUS, held by INEOS US CHEMICALS COMPANY, holds NPDES permit IL0045241, which discharges to Unnamed Trib To Cress Creek. EPA’s file records it issued September 7, 2018 and expiring September 30, 2023. The status and dates are as EPA’s permit file stood when Velarion loaded it (September 14, 2026); EPA’s free Detailed Facility Report on ECHO carries the permit’s current standing.
Identity
| Facility as filed | INEOS US CHEMICALS COMPANY-NAPERVILLE CAMPUS |
|---|---|
| Permittee as filed | INEOS US CHEMICALS COMPANY |
| NPDES ID | IL0045241 |
| Permit status | Administratively continued (past its expiration date and still in force until reissued) |
| Permit type | Individual permit |
| Discharger class | Minor discharger |
| Facility type | Not a publicly owned treatment works |
| Issued | September 7, 2018 |
| Expiration date | September 30, 2023 |
| Address | Naperville, IL 60563 |
| Receiving water | UNNAMED TRIB TO CRESS CREEK |
| Receiving water impaired | 303(D) Listed |
| Subwatershed | Lower West Branch Du Page River (HUC 071200040805) |
Cited to the EPA ICIS-NPDES permit file (ECHO download).
Effluent limits and exceedances
- 5Pollutants on file
- 2Under a numeric limit
- 5With a violation of any kind
- 3With 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 |
|---|---|---|---|---|---|
| pH | 0 | 11 | 11 | June 30, 2013 | |
| Chlorine, total residual | 0 | 4 | 4 | October 31, 2013 | 160% over the limit |
| Solids, total suspended | 0 | 1 | 1 | July 31, 2013 | 13% over the limit |
| Flow, in conduit or thru treatment plant | 2 | 8 | 0 | ||
| Temperature, water deg. fahrenheit | 2 | 4 | 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 IL0045241.
Velarion’s copy of EPA’s ICIS-NPDES files does not yet 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
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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 IL0045241 there.
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Figures from EPA’s ICIS-NPDES download, loaded September 14, 2026.