Clean Water Act discharge permit · NPDES IL0031984
IL AMERICAN WTR COMPANY-CHICKASAW HILLS WRF, Lockport, IL: NPDES IL0031984 discharge permit, effluent exceedances, inspections, penalties
- Administratively continuedPermit status
- MinorDischarger class
- 11Pollutants under a numeric limit
- 9Pollutants with an effluent exceedance
IL AMERICAN WTR COMPANY-CHICKASAW HILLS WRF, held by ILLINOIS AMERICAN WATER COMPANY, holds NPDES permit IL0031984, which discharges to Long Run Creek. EPA’s file records it issued May 19, 2015 and expiring May 31, 2020. The status and dates are as EPA’s permit file stood when Velarion loaded it (September 15, 2026); EPA’s free Detailed Facility Report on ECHO carries the permit’s current standing.
Identity
| Facility as filed | IL AMERICAN WTR COMPANY-CHICKASAW HILLS WRF |
|---|---|
| Permittee as filed | ILLINOIS AMERICAN WATER COMPANY |
| NPDES ID | IL0031984 |
| 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 | May 19, 2015 |
| Expiration date | May 31, 2020 |
| Address | Lockport, IL 60441 |
| Receiving water | LONG RUN CREEK |
| Subwatershed | Long Run (HUC 071200040703) |
Cited to the EPA ICIS-NPDES permit file (ECHO download).
Effluent limits and exceedances
- 12Pollutants on file
- 11Under a numeric limit
- 10With a violation of any kind
- 9With 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 | 5 | 70 | 68 | February 28, 2023 | 99,999% over the limit |
| BOD, 5-day, 20 deg. C | 4 | 67 | 64 | October 31, 2019 | 157% over the limit |
| Solids, total suspended | 12 | 40 | 34 | July 31, 2023 | 457% over the limit |
| Nitrogen, ammonia total [as N] | 43 | 31 | 31 | January 31, 2024 | 387% over the limit |
| BOD, carbonaceous [5 day, 20 C] | 8 | 9 | 9 | August 31, 2018 | 99% over the limit |
| Coliform, fecal - % samples exceeding limit | 2 | 4 | 4 | August 31, 2019 | 400% over the limit |
| Oxygen, dissolved [DO] | 12 | 2 | 2 | July 31, 2018 | 13% over the limit |
| Chlorine, total residual | 5 | 8 | 1 | May 31, 2001 | 900% over the limit |
| Phosphorus, total [as P] | 0 | 1 | 1 | September 30, 2021 | 10% over the limit |
| pH | 6 | 6 | 0 | ||
| Flow, in conduit or thru treatment plant | 6 | 0 | 0 | ||
| Flow, total | 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
- 2Single-event violations
| Date | What EPA recorded | Agency |
|---|---|---|
| January 9, 2026 | Dry-weather SSO, no discharge to waters of the U.S., that may endanger health or the environment | ST6 |
| June 26, 2025 | Dry-weather SSO, no discharge to waters of the U.S., that may endanger health or the environment | ST6 |
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 IL0031984 there.
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Figures from EPA’s ICIS-NPDES download, loaded September 15, 2026.