Clean Water Act discharge permit · NPDES IL0055981
IL AMERICAN WTR COMPANY-OAK VALLEY WRF, Lockport, IL: NPDES IL0055981 discharge permit, effluent exceedances, inspections, penalties
- Administratively continuedPermit status
- MajorDischarger class
- 32Pollutants under a numeric limit
- 6Pollutants with an effluent exceedance
IL AMERICAN WTR COMPANY-OAK VALLEY WRF, held by ILLINOIS AMERICAN WATER COMPANY, holds NPDES permit IL0055981, which discharges to Spring Creek. EPA’s file records it issued August 4, 2015 and expiring July 31, 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 | IL AMERICAN WTR COMPANY-OAK VALLEY WRF |
|---|---|
| Permittee as filed | ILLINOIS AMERICAN WATER COMPANY |
| NPDES ID | IL0055981 |
| 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 |
| Program | Biosolids |
| Issued | August 4, 2015 |
| Expiration date | July 31, 2020 |
| Address | Lockport, IL 60441 |
| Receiving water | SPRING CREEK |
| Receiving water impaired | 303(D) Listed |
| Subwatershed | Spring Creek (HUC 071200040602) |
| 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
- 52Pollutants on file
- 32Under a numeric limit
- 51With a violation of any kind
- 6With 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 |
|---|---|---|---|---|---|
| Nitrogen, ammonia total [as N] | 21 | 38 | 18 | October 31, 2023 | 191% over the limit |
| Solids, total suspended | 9 | 21 | 16 | August 31, 2020 | 88% over the limit |
| Coliform, fecal general | 2 | 15 | 12 | September 30, 2023 | 64,738% over the limit |
| BOD, 5-day, 20 deg. C | 4 | 4 | 4 | December 31, 2008 | 33% over the limit |
| Chlorine, total residual | 2 | 25 | 1 | August 31, 1999 | 700% over the limit |
| Phosphorus, total [as P] | 4 | 9 | 1 | February 28, 2026 | 31% over the limit |
| BOD, carbonaceous [5 day, 20 C] | 5 | 19 | 0 | ||
| Oxygen, dissolved [DO] | 7 | 12 | 0 | ||
| Nitrogen, total [as N] | 1 | 5 | 0 | ||
| pH | 4 | 4 | 0 | ||
| Flow, in conduit or thru treatment plant | 4 | 4 | 0 | ||
| Nickel, total [as Ni] | 4 | 3 | 0 | ||
| Silver, total [as Ag] | 4 | 3 | 0 | ||
| Oil & Grease | 2 | 3 | 0 | ||
| Cyanide, weak acid, dissociable | 2 | 3 | 0 | ||
| Cyanide, total [as CN] | 2 | 3 | 0 | ||
| Fluoride, total [as F] | 2 | 3 | 0 | ||
| Arsenic, total [as As] | 2 | 3 | 0 | ||
| Barium, total [as Ba] | 2 | 3 | 0 | ||
| Cadmium, total [as Cd] | 2 | 3 | 0 | ||
| Chromium, hexavalent [as Cr] | 2 | 3 | 0 | ||
| Chromium, total [as Cr] | 2 | 3 | 0 | ||
| Copper, total [as Cu] | 2 | 3 | 0 | ||
| Iron, total [as Fe] | 2 | 3 | 0 | ||
| Iron, dissolved [as Fe] | 2 | 3 | 0 | ||
| Lead, total [as Pb] | 2 | 3 | 0 | ||
| Manganese, total [as Mn] | 2 | 3 | 0 | ||
| Zinc, total [as Zn] | 2 | 3 | 0 | ||
| Selenium, total [as Se] | 2 | 3 | 0 | ||
| Phenolics, total recoverable | 2 | 3 | 0 | ||
| Mercury, total [as Hg] | 2 | 3 | 0 | ||
| Arsenic, dry weight | 0 | 3 | 0 | ||
| Selenium, dry weight | 0 | 3 | 0 | ||
| Copper, dry weight | 0 | 3 | 0 | ||
| Cadmium, dry weight | 0 | 3 | 0 | ||
| Zinc, sludge, total, dry weight [as Zn] | 0 | 3 | 0 | ||
| Lead, sludge, total, dry weight [as Pb] | 0 | 3 | 0 | ||
| Nickel, sludge, total, dry weight [as Ni] | 0 | 3 | 0 | ||
| Mercury, sludge, total, dry weight [as Hg] | 0 | 3 | 0 | ||
| Molybdenum, sludge, total, dry weight [as Mo] | 0 | 2 | 0 | ||
| Ann. amt sludge disposed by other method | 0 | 1 | 0 | ||
| Annual amt of sludge incinerated | 0 | 1 | 0 | ||
| Annual sludge production, total | 0 | 1 | 0 | ||
| Annual amount of sludge land applied | 0 | 1 | 0 | ||
| Annual amt. sludge disposed surface unit | 0 | 1 | 0 | ||
| Annual amt sludge disposed in landfill | 0 | 1 | 0 | ||
| Annual amt sludge transported interstate | 0 | 1 | 0 | ||
| Pollutant table from 503.13 | 0 | 1 | 0 | ||
| Level of pathogen requirements achieved | 0 | 1 | 0 | ||
| Description of pathogen option used | 0 | 1 | 0 | ||
| Vector attraction reduction alternative used | 0 | 1 | 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
- 1Single-event violations
| Date | What EPA recorded | Agency |
|---|---|---|
| August 11, 2026 | Wet-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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Figures from EPA’s ICIS-NPDES download, loaded October 14, 2026.