Clean Water Act discharge permit · NPDES IL0048577
WASHINGTON COUNTY CONSERVATION AREA -STP, Nashville, IL: NPDES IL0048577 discharge permit, effluent exceedances, inspections, penalties
- Administratively continuedPermit status
- MinorDischarger class
- 9Pollutants under a numeric limit
- 7Pollutants with an effluent exceedance
WASHINGTON COUNTY CONSERVATION AREA -STP, held by ILLINOIS DEPARTMENT OF NATURAL RESOURCES, holds NPDES permit IL0048577, which discharges to Unnamed Trib To Locust Creek. EPA’s file records it issued December 31, 2018 and expiring December 31, 2023. 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 | WASHINGTON COUNTY CONSERVATION AREA -STP |
|---|---|
| Permittee as filed | ILLINOIS DEPARTMENT OF NATURAL RESOURCES |
| NPDES ID | IL0048577 |
| 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 | December 31, 2018 |
| Expiration date | December 31, 2023 |
| Address | Nashville, IL 62263 |
| Receiving water | UNNAMED TRIB TO LOCUST CREEK |
| Receiving water impaired | 303(D) Listed |
| Subwatershed | Washington County Lake (HUC 071401061002) |
Cited to the EPA ICIS-NPDES permit file (ECHO download).
Effluent limits and exceedances
- 9Pollutants on file
- 9Under a numeric limit
- 9With a violation of any kind
- 7With 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] | 16 | 247 | 193 | October 31, 2021 | 54,300% over the limit |
| Coliform, fecal general | 1 | 64 | 51 | October 31, 2021 | 99,999% over the limit |
| BOD, carbonaceous [5 day, 20 C] | 4 | 74 | 36 | August 31, 2020 | 250% over the limit |
| Oxygen, dissolved [DO] | 5 | 100 | 32 | August 31, 2021 | 100% over the limit |
| Solids, total suspended | 5 | 71 | 27 | June 30, 2017 | 142% over the limit |
| Chlorine, total residual | 1 | 33 | 24 | July 31, 2021 | 7,140% over the limit |
| pH | 2 | 28 | 10 | March 31, 2018 | |
| Flow, in conduit or thru treatment plant | 4 | 34 | 0 | ||
| BOD, 5-day, 20 deg. C | 1 | 8 | 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 |
|---|---|---|
| May 28, 2026 | 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.
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 IL0048577 there.
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Figures from EPA’s ICIS-NPDES download, loaded September 15, 2026.