Clean Water Act discharge permit · NPDES IL0024414
MAHOMET STP, VILLAGE OF, Mahomet, IL: NPDES IL0024414 discharge permit, effluent exceedances, inspections, penalties
- Administratively continuedPermit status
- MinorDischarger class
- 13Pollutants under a numeric limit
- 7Pollutants with an effluent exceedance
MAHOMET STP, VILLAGE OF, held by MAHOMET, VILLAGE OF, holds NPDES permit IL0024414, which discharges to Sangamon River. EPA’s file records it issued June 10, 2020 and expiring May 31, 2025. The status and dates are as EPA’s permit file stood when Velarion loaded it (September 14, 2026); EPA’s free Detailed Facility Report on ECHO carries the permit’s current standing.
Identity
| Facility as filed | MAHOMET STP, VILLAGE OF |
|---|---|
| Permittee as filed | MAHOMET, VILLAGE OF |
| NPDES ID | IL0024414 |
| Permit status | Administratively continued (past its expiration date and still in force until reissued) |
| Permit type | Individual permit |
| Discharger class | Minor discharger |
| Facility type | Publicly owned treatment works |
| Program | Publicly owned treatment works |
| Issued | June 10, 2020 |
| Expiration date | May 31, 2025 |
| Address | Mahomet, IL 61853 |
| Receiving water | SANGAMON RIVER |
| Subwatershed | Spring Lake-Sangamon River (HUC 071300060206) |
Cited to the EPA ICIS-NPDES permit file (ECHO download).
Effluent limits and exceedances
- 13Pollutants on file
- 13Under a numeric limit
- 13With 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 |
|---|---|---|---|---|---|
| Chlorine, total residual | 3 | 87 | 83 | August 31, 2017 | 65,900% over the limit |
| Nitrogen, ammonia total [as N] | 19 | 22 | 4 | March 31, 2013 | 567% over the limit |
| Nitrogen, nitrate total [as N] | 5 | 7 | 4 | March 31, 2024 | 51% over the limit |
| Solids, total suspended | 9 | 14 | 3 | March 31, 2013 | 58% over the limit |
| Phosphorus, total [as P] | 5 | 5 | 3 | September 30, 2019 | 13% over the limit |
| BOD, carbonaceous [5 day, 20 C] | 4 | 10 | 2 | May 31, 2000 | 51% over the limit |
| BOD, 5-day, 20 deg. C | 5 | 5 | 2 | May 31, 1999 | 73% over the limit |
| Coliform, fecal general | 4 | 28 | 0 | ||
| pH | 4 | 8 | 0 | ||
| Flow, in conduit or thru treatment plant | 4 | 6 | 0 | ||
| Oxygen, dissolved [DO] | 8 | 4 | 0 | ||
| Coliform, fecal - % samples exceeding limit | 2 | 1 | 0 | ||
| Flow, total | 2 | 1 | 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 IL0024414.
Velarion’s copy of EPA’s ICIS-NPDES files does not yet 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, IL0024414.
Start the watch
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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 IL0024414 there.
Nearby on the register
- Discharge permits in Mahomet
- Every permit record in Mahomet, A to Z
- Discharge permits in Illinois
- Every permit record in Illinois, A to Z
Figures from EPA’s ICIS-NPDES download, loaded September 14, 2026.