Clean Water Act discharge permit · NPDES ILG582023
LANARK STP, CITY OF, Lanark, IL: NPDES ILG582023 discharge permit, effluent exceedances, inspections, penalties
- Administratively continuedPermit status
- MinorDischarger class
- 9Pollutants under a numeric limit
- 2Pollutants with an effluent exceedance
LANARK STP, CITY OF, held by LANARK, CITY OF, holds NPDES permit ILG582023, which discharges to Rock Creek. EPA’s file records it issued November 19, 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 | LANARK STP, CITY OF |
|---|---|
| Permittee as filed | LANARK, CITY OF |
| NPDES ID | ILG582023 |
| 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 | Publicly owned treatment works |
| Program | Publicly owned treatment works |
| Issued | November 19, 2014 |
| Expiration date | June 30, 2018 |
| Address | Lanark, IL 61046 |
| Receiving water | ROCK CREEK |
| Subwatershed | Town of Chadwick-Rock Creek (HUC 070900050902) |
| 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
- 2With 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 |
|---|---|---|---|---|---|
| Oxygen, dissolved [DO] | 1 | 29 | 14 | April 30, 2022 | 83% over the limit |
| Solids, total suspended | 5 | 82 | 3 | February 29, 2020 | 41% over the limit |
| BOD, carbonaceous [5 day, 20 C] | 4 | 66 | 0 | ||
| Flow, in conduit or thru treatment plant | 4 | 63 | 0 | ||
| pH | 2 | 32 | 0 | ||
| Chlorine, total residual | 1 | 17 | 0 | ||
| BOD, 5-day, 20 deg. C | 1 | 15 | 0 | ||
| Nitrogen, ammonia total [as N] | 1 | 15 | 0 | ||
| Coliform, fecal general | 1 | 6 | 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 ILG582023.
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 ILG582023 there.
Nearby on the register
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- Every permit record in Lanark, A to Z
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- Every permit record in Illinois, A to Z
Figures from EPA’s ICIS-NPDES download, loaded October 14, 2026.