Clean Water Act discharge permit · NPDES IL0023591
FREEPORT STP, CITY OF, Freeport, IL: NPDES IL0023591 discharge permit, effluent exceedances, inspections, penalties
- Administratively continuedPermit status
- MajorDischarger class
- 12Pollutants under a numeric limit
- 6Pollutants with an effluent exceedance
FREEPORT STP, CITY OF, held by FREEPORT, CITY OF, holds NPDES permit IL0023591, which discharges to Pecatonica River. EPA’s file records it issued June 17, 2020 and expiring June 30, 2025. 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 | FREEPORT STP, CITY OF |
|---|---|
| Permittee as filed | FREEPORT, CITY OF |
| NPDES ID | IL0023591 |
| 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 | June 17, 2020 |
| Expiration date | June 30, 2025 |
| Address | Freeport, IL 61032 |
| Receiving water | PECATONICA RIVER |
| Receiving water impaired | 303(D) Listed |
| Subwatershed | Wickham Creek-Pecatonica River (HUC 070900031406) |
| Program components on file | Biosolids, 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
- 35Pollutants on file
- 12Under 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] | 49 | 57 | 31 | January 31, 2025 | 271% over the limit |
| Solids, total suspended | 14 | 54 | 28 | December 31, 2019 | 198% over the limit |
| Coliform, fecal general | 8 | 29 | 24 | September 30, 2021 | 249,900% over the limit |
| BOD, carbonaceous [5 day, 20 C] | 12 | 30 | 6 | December 31, 2019 | 18% over the limit |
| Chlorine, total residual | 6 | 7 | 2 | June 30, 2018 | 1,060% over the limit |
| Zinc, total [as Zn] | 0 | 10 | 1 | May 31, 2014 | 9% over the limit |
| Flow, in conduit or thru treatment plant | 8 | 22 | 0 | ||
| Nickel, total [as Ni] | 0 | 13 | 0 | ||
| Silver, total [as Ag] | 0 | 13 | 0 | ||
| Cadmium, total [as Cd] | 0 | 12 | 0 | ||
| pH | 6 | 10 | 0 | ||
| Copper, total [as Cu] | 0 | 9 | 0 | ||
| Phosphorus, total [as P] | 8 | 8 | 0 | ||
| Nitrogen, total [as N] | 3 | 7 | 0 | ||
| Iron, total [as Fe] | 0 | 7 | 0 | ||
| Iron, dissolved [as Fe] | 0 | 7 | 0 | ||
| Lead, total [as Pb] | 0 | 7 | 0 | ||
| Manganese, total [as Mn] | 0 | 7 | 0 | ||
| Thallium, total [as Tl] | 0 | 7 | 0 | ||
| Antimony, total [as Sb] | 0 | 7 | 0 | ||
| Selenium, total [as Se] | 0 | 7 | 0 | ||
| Phenolics, total recoverable | 0 | 7 | 0 | ||
| Mercury, total [as Hg] | 0 | 7 | 0 | ||
| BOD, 5-day, 20 deg. C | 2 | 6 | 0 | ||
| Oil & Grease | 0 | 6 | 0 | ||
| Cyanide, weak acid, dissociable | 0 | 6 | 0 | ||
| Cyanide, total [as CN] | 0 | 6 | 0 | ||
| Fluoride, total [as F] | 0 | 6 | 0 | ||
| Arsenic, total [as As] | 0 | 6 | 0 | ||
| Barium, total [as Ba] | 0 | 6 | 0 | ||
| Beryllium, total [as Be] | 0 | 6 | 0 | ||
| Chromium, hexavalent [as Cr] | 0 | 6 | 0 | ||
| Chromium, total [as Cr] | 0 | 6 | 0 | ||
| Coliform, fecal - % samples exceeding limit | 3 | 1 | 0 | ||
| Flow, total | 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
- 1Single-event violations
| Date | What EPA recorded | Agency |
|---|---|---|
| April 15, 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.
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Figures from EPA’s ICIS-NPDES download, loaded October 14, 2026.