Clean Water Act discharge permit · NPDES IL0031453
ILLINOIS AMERICAN WATER - TOLONO STP, Tolono, IL: NPDES IL0031453 discharge permit, effluent exceedances, inspections, penalties
- EffectivePermit status
- MinorDischarger class
- 11Pollutants under a numeric limit
- 5Pollutants with an effluent exceedance
ILLINOIS AMERICAN WATER - TOLONO STP, held by TOLONO, VILLAGE OF, holds NPDES permit IL0031453, which discharges to Hackett Branch. EPA’s file records it issued November 18, 2016 and expiring November 30, 2021. 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 | ILLINOIS AMERICAN WATER - TOLONO STP |
|---|---|
| Permittee as filed | TOLONO, VILLAGE OF |
| NPDES ID | IL0031453 |
| Permit status | Effective |
| Permit type | Individual permit |
| Discharger class | Minor discharger |
| Facility type | Not a publicly owned treatment works |
| Program | Publicly owned treatment works |
| Issued | November 18, 2016 |
| Expiration date | November 30, 2021 |
| Address | Tolono, IL 61880 |
| Receiving water | HACKETT BRANCH |
| Subwatershed | Cottonwood Creek (HUC 051201120704) |
| Program components on file | Biosolids, POTW |
| 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
- 11Pollutants on file
- 11Under a numeric limit
- 11With a violation of any kind
- 5With 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] | 51 | 162 | 116 | July 31, 2026 | 9,667% over the limit |
| Solids, total suspended | 7 | 100 | 89 | July 31, 2026 | 921% over the limit |
| BOD, carbonaceous [5 day, 20 C] | 4 | 51 | 43 | February 28, 2026 | 244% over the limit |
| Oxygen, dissolved [DO] | 6 | 21 | 14 | June 30, 2023 | 78% over the limit |
| Coliform, fecal general | 2 | 6 | 2 | March 31, 2026 | 99,999% over the limit |
| Chlorine, total residual | 2 | 22 | 0 | ||
| Flow, in conduit or thru treatment plant | 4 | 7 | 0 | ||
| Phosphorus, total [as P] | 2 | 7 | 0 | ||
| pH | 4 | 6 | 0 | ||
| BOD, 5-day, 20 deg. C | 3 | 3 | 0 | ||
| Flow, total | 1 | 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
- 1Single-event violations
| Date | What EPA recorded | Agency |
|---|---|---|
| March 4, 2026 | Wet-weather unanticipated prohibited bypass discharge to waters of the U.S. - endangerment | 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
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, IL0031453.
Start the watch
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- One watershed — $2,990/year
- One state — $4,990/year
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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 IL0031453 there.
Nearby on the register
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- Every permit record in Tolono, A to Z
- Discharge permits in Illinois
- Every permit record in Illinois, A to Z
Figures from EPA’s ICIS-NPDES download, loaded October 14, 2026.