Clean Water Act discharge permit · NPDES IL0029831
MATTOON STP, CITY OF, Mattoon, IL: NPDES IL0029831 discharge permit, effluent exceedances, inspections, penalties
- Administratively continuedPermit status
- MajorDischarger class
- 15Pollutants under a numeric limit
- 4Pollutants with an effluent exceedance
MATTOON STP, CITY OF, held by MATTOON, CITY OF, holds NPDES permit IL0029831, which discharges to Kickapoo Creek. EPA’s file records it issued August 17, 2011 and expiring August 31, 2016. 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 | MATTOON STP, CITY OF |
|---|---|
| Permittee as filed | MATTOON, CITY OF |
| NPDES ID | IL0029831 |
| Permit status | Administratively continued (past its expiration date and still in force until reissued) |
| Permit type | Individual permit |
| Discharger class | Major discharger |
| Facility type | Publicly owned treatment works |
| Program | Publicly owned treatment works |
| Issued | August 17, 2011 |
| Expiration date | August 31, 2016 |
| Address | Mattoon, IL 61938 |
| Receiving water | KICKAPOO CREEK |
| Subwatershed | Riley Creek (HUC 051201120601) |
| Program components on file | Biosolids, CSO, POTW, Pretreatment |
| 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
- 15Pollutants on file
- 15Under a numeric limit
- 12With a violation of any kind
- 4With 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 | 2 | 34 | 32 | March 31, 2026 | 99,999% over the limit |
| Solids, total suspended | 7 | 19 | 11 | March 31, 2026 | 383% over the limit |
| BOD, carbonaceous [5 day, 20 C] | 4 | 10 | 2 | July 31, 2021 | 95% over the limit |
| Chlorine, total residual | 2 | 5 | 2 | January 31, 2008 | 1,560% over the limit |
| Nitrogen, ammonia total [as N] | 50 | 6 | 0 | ||
| pH | 4 | 6 | 0 | ||
| Flow, in conduit or thru treatment plant | 4 | 4 | 0 | ||
| BOD, 5-day, 20 deg. C | 3 | 4 | 0 | ||
| Oxygen, dissolved [DO] | 5 | 3 | 0 | ||
| Phosphorus, total [as P] | 1 | 3 | 0 | ||
| Nitrogen, total [as N] | 2 | 2 | 0 | ||
| Flow, total | 1 | 1 | 0 | ||
| Flow | 6 | 0 | 0 | ||
| Cyanide, weak acid, dissociable | 1 | 0 | 0 | ||
| Mercury, total [as Hg] | 1 | 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
- 0Single-event violations
EPA’s single-event violation file, as loaded, holds no violation for NPDES IL0029831.
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
One permit holder, $99/month. Watch the register for one permit holder and the places and receiving waters tied to its permits. Choose “One permit holder” and enter this permit’s NPDES ID, IL0029831.
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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 IL0029831 there.
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Figures from EPA’s ICIS-NPDES download, loaded October 14, 2026.