Clean Water Act discharge permit · NPDES IL0029980
MONTICELLO STP, CITY OF, Monticello, IL: NPDES IL0029980 discharge permit, effluent exceedances, inspections, penalties
- Administratively continuedPermit status
- MajorDischarger class
- 16Pollutants under a numeric limit
- 6Pollutants with an effluent exceedance
MONTICELLO STP, CITY OF, held by MONTICELLO, CITY OF, holds NPDES permit IL0029980, which discharges to Unnamed Trib Of Sangamon River. EPA’s file records it issued September 14, 2011 and expiring September 30, 2016. 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 | MONTICELLO STP, CITY OF |
|---|---|
| Permittee as filed | MONTICELLO, CITY OF |
| NPDES ID | IL0029980 |
| 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 | September 14, 2011 |
| Expiration date | September 30, 2016 |
| Address | Monticello, IL 61856 |
| Receiving water | UNNAMED TRIB OF SANGAMON RIVER |
| Subwatershed | Wildcat Creek-Sangamon River (HUC 071300060404) |
Cited to the EPA ICIS-NPDES permit file (ECHO download).
Effluent limits and exceedances
- 36Pollutants on file
- 16Under a numeric limit
- 34With a violation of any kind
- 6With 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] | 112 | 30 | 12 | September 30, 2024 | 4,596% over the limit |
| Solids, total suspended | 11 | 24 | 8 | January 31, 2023 | 360% over the limit |
| Copper, total [as Cu] | 4 | 12 | 8 | March 31, 2012 | 357% over the limit |
| BOD, carbonaceous [5 day, 20 C] | 8 | 24 | 4 | September 30, 2001 | 774% over the limit |
| BOD, 5-day, 20 deg. C | 3 | 3 | 3 | April 30, 2016 | 45% over the limit |
| Phosphorus, total [as P] | 4 | 9 | 1 | July 31, 2022 | 22% over the limit |
| Oxygen, dissolved [DO] | 10 | 12 | 0 | ||
| Flow, in conduit or thru treatment plant | 6 | 12 | 0 | ||
| pH | 8 | 8 | 0 | ||
| Nitrogen, total [as N] | 4 | 8 | 0 | ||
| Mercury, total [as Hg] | 2 | 6 | 0 | ||
| Chlorine, total residual | 6 | 4 | 0 | ||
| Coliform, fecal general | 6 | 4 | 0 | ||
| Coliform, fecal - % samples exceeding limit | 2 | 4 | 0 | ||
| Oil & Grease | 0 | 4 | 0 | ||
| Nitrite + Nitrate total [as N] | 0 | 4 | 0 | ||
| Cyanide, total [as CN] | 0 | 4 | 0 | ||
| Fluoride, total [as F] | 0 | 4 | 0 | ||
| Arsenic, total [as As] | 0 | 4 | 0 | ||
| Barium, total [as Ba] | 0 | 4 | 0 | ||
| Cadmium, total [as Cd] | 0 | 4 | 0 | ||
| Chromium, hexavalent [as Cr] | 0 | 4 | 0 | ||
| Chromium, total [as Cr] | 0 | 4 | 0 | ||
| Iron, total [as Fe] | 0 | 4 | 0 | ||
| Iron, dissolved [as Fe] | 0 | 4 | 0 | ||
| Lead, total [as Pb] | 0 | 4 | 0 | ||
| Manganese, total [as Mn] | 0 | 4 | 0 | ||
| Nickel, total [as Ni] | 0 | 4 | 0 | ||
| Silver, total [as Ag] | 0 | 4 | 0 | ||
| Zinc, total [as Zn] | 0 | 4 | 0 | ||
| Selenium, total [as Se] | 0 | 4 | 0 | ||
| Phenolics, total recoverable | 0 | 4 | 0 | ||
| Cyanide, free [amenable to chlorination] | 0 | 3 | 0 | ||
| Cyanide, weak acid, dissociable | 0 | 1 | 0 | ||
| Nitrogen, nitrate total [as N] | 4 | 0 | 0 | ||
| Flow, total | 2 | 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
- 2Single-event violations
| Date | What EPA recorded | Agency |
|---|---|---|
| December 5, 2025 | Dry-weather SSO, no discharge to waters of the U.S., not permit compliant, no endangerment | ST6 |
| May 6, 2025 | 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 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.
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Figures from EPA’s ICIS-NPDES download, loaded September 14, 2026.