Clean Water Act discharge permit · NPDES IL0026450
DIXON - WASTEWATER TREATMENT PLANT, Dixon, IL: NPDES IL0026450 discharge permit, effluent exceedances, inspections, penalties
- Administratively continuedPermit status
- MajorDischarger class
- 32Pollutants under a numeric limit
- 3Pollutants with an effluent exceedance
DIXON - WASTEWATER TREATMENT PLANT, held by DIXON, CITY OF, holds NPDES permit IL0026450, which discharges to Rock River. EPA’s file records it issued March 1, 2016 and expiring February 28, 2021. The status and dates are as EPA’s permit file stood when Velarion loaded it (September 15, 2026); EPA’s free Detailed Facility Report on ECHO carries the permit’s current standing.
Identity
| Facility as filed | DIXON - WASTEWATER TREATMENT PLANT |
|---|---|
| Permittee as filed | DIXON, CITY OF |
| NPDES ID | IL0026450 |
| 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 | March 1, 2016 |
| Expiration date | February 28, 2021 |
| Address | Dixon, IL 61021 |
| Receiving water | ROCK RIVER |
| Receiving water impaired | 303(D) Listed |
| Subwatershed | Plum Creek-Rock River (HUC 070900050606) |
Cited to the EPA ICIS-NPDES permit file (ECHO download).
Effluent limits and exceedances
- 32Pollutants on file
- 32Under a numeric limit
- 26With a violation of any kind
- 3With 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 |
|---|---|---|---|---|---|
| BOD, carbonaceous [5 day, 20 C] | 4 | 46 | 18 | July 31, 2016 | 50% over the limit |
| Coliform, fecal general | 1 | 11 | 11 | October 31, 2001 | 99,999% over the limit |
| Solids, total suspended | 5 | 11 | 3 | April 30, 2001 | 12% over the limit |
| Nitrogen, ammonia total [as N] | 10 | 17 | 0 | ||
| Oxygen, dissolved [DO] | 5 | 12 | 0 | ||
| Flow, in conduit or thru treatment plant | 4 | 6 | 0 | ||
| Phosphorus, total [as P] | 1 | 5 | 0 | ||
| Chlorine, total residual | 1 | 5 | 0 | ||
| pH | 2 | 4 | 0 | ||
| Nitrogen, total [as N] | 1 | 4 | 0 | ||
| Zinc, total [as Zn] | 2 | 2 | 0 | ||
| Arsenic, total [as As] | 2 | 1 | 0 | ||
| Barium, total [as Ba] | 2 | 1 | 0 | ||
| Cadmium, total [as Cd] | 2 | 1 | 0 | ||
| Chromium, hexavalent [as Cr] | 2 | 1 | 0 | ||
| Chromium, total [as Cr] | 2 | 1 | 0 | ||
| Copper, total [as Cu] | 2 | 1 | 0 | ||
| Iron, total [as Fe] | 2 | 1 | 0 | ||
| Iron, dissolved [as Fe] | 2 | 1 | 0 | ||
| Lead, total [as Pb] | 2 | 1 | 0 | ||
| Manganese, total [as Mn] | 2 | 1 | 0 | ||
| Nickel, total [as Ni] | 2 | 1 | 0 | ||
| Silver, total [as Ag] | 2 | 1 | 0 | ||
| Selenium, total [as Se] | 2 | 1 | 0 | ||
| Phenolics, total recoverable | 2 | 1 | 0 | ||
| Mercury, total [as Hg] | 2 | 1 | 0 | ||
| Overflows | 4 | 0 | 0 | ||
| Oil & Grease | 2 | 0 | 0 | ||
| Cyanide, total [as CN] | 2 | 0 | 0 | ||
| Cyanide, free [amenable to chlorination] | 2 | 0 | 0 | ||
| Fluoride, total [as F] | 2 | 0 | 0 | ||
| BOD, 5-day, 20 deg. C | 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
- 3Single-event violations
| Date | What EPA recorded | Agency |
|---|---|---|
| May 8, 2026 | Dry-weather SSO, no discharge to waters of the U.S., that may endanger health or the environment | ST6 |
| April 18, 2025 | Dry-weather SSO, no discharge to waters of the U.S., not permit compliant, no endangerment | ST6 |
| April 3, 2025 | Dry-weather SSO, no discharge to waters of the U.S., not permit compliant, no 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, IL0026450.
Start the watch
- One permit holder — $99/month
- One watershed — $2,990/year
- One state — $4,990/year
- The whole register — $18,000/year
How we handle your data → Privacy
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 IL0026450 there.
Nearby on the register
- Discharge permits in Dixon
- Every permit record in Dixon, A to Z
- Discharge permits in Illinois
- Every permit record in Illinois, A to Z
Figures from EPA’s ICIS-NPDES download, loaded September 15, 2026.