Clean Water Act discharge permit · NPDES ILG551070
ILLINOIS AMERICAN WATER COMPANY-WESTLAKE STP, Pecatonica, IL: NPDES ILG551070 discharge permit, effluent exceedances, inspections, penalties
- Administratively continuedPermit status
- MinorDischarger class
- 9Pollutants under a numeric limit
- 1Pollutants with an effluent exceedance
ILLINOIS AMERICAN WATER COMPANY-WESTLAKE STP, held by WESTLAKE UTILITIES INC, holds NPDES permit ILG551070, which discharges to Coolidge Creek. EPA’s file records it issued June 6, 2014 and expiring June 30, 2018. 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 | ILLINOIS AMERICAN WATER COMPANY-WESTLAKE STP |
|---|---|
| Permittee as filed | WESTLAKE UTILITIES INC |
| NPDES ID | ILG551070 |
| Permit status | Administratively continued (past its expiration date and still in force until reissued) |
| Permit type | Coverage under a general permit |
| Discharger class | Minor discharger |
| Facility type | Not a publicly owned treatment works |
| Issued | June 6, 2014 |
| Expiration date | June 30, 2018 |
| Address | Pecatonica, IL 61063 |
| Receiving water | COOLIDGE CREEK |
| Receiving water impaired | 303(D) Listed |
| Subwatershed | Coolidge Creek (HUC 070900031601) |
| 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
- 9Pollutants on file
- 9Under a numeric limit
- 9With a violation of any kind
- 1With 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 | 5 | 16 | 4 | May 31, 2025 | 24% over the limit |
| Flow, in conduit or thru treatment plant | 4 | 8 | 0 | ||
| BOD, carbonaceous [5 day, 20 C] | 4 | 8 | 0 | ||
| pH | 2 | 4 | 0 | ||
| Chlorine, total residual | 1 | 3 | 0 | ||
| BOD, 5-day, 20 deg. C | 1 | 2 | 0 | ||
| Oxygen, dissolved [DO] | 1 | 1 | 0 | ||
| Nitrogen, ammonia total [as N] | 1 | 1 | 0 | ||
| Coliform, fecal general | 1 | 1 | 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 ILG551070.
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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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 ILG551070 there.
Nearby on the register
- Discharge permits in Pecatonica
- Every permit record in Pecatonica, A to Z
- Discharge permits in Illinois
- Every permit record in Illinois, A to Z
Figures from EPA’s ICIS-NPDES download, loaded October 14, 2026.