Clean Water Act discharge permit · NPDES IL0065188
DUPAGE COUNTY PUBLIC WORKS KNOLLWOOD STP, Burr Ridge, IL: NPDES IL0065188 discharge permit, effluent exceedances, inspections, penalties
- Administratively continuedPermit status
- MajorDischarger class
- 33Pollutants under a numeric limit
- 6Pollutants with an effluent exceedance
DUPAGE COUNTY PUBLIC WORKS KNOLLWOOD STP, held by DUPAGE COUNTY PUBLIC WORKS, holds NPDES permit IL0065188, which discharges to Des Plaines River. EPA’s file records it issued August 20, 2015 and expiring August 31, 2020. 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 | DUPAGE COUNTY PUBLIC WORKS KNOLLWOOD STP |
|---|---|
| Permittee as filed | DUPAGE COUNTY PUBLIC WORKS |
| NPDES ID | IL0065188 |
| 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 | August 20, 2015 |
| Expiration date | August 31, 2020 |
| Address | Burr Ridge, IL 60521 |
| Receiving water | DES PLAINES RIVER |
| Receiving water impaired | 303(D) Listed |
| Subwatershed | Goose Lake-Des Plaines River (HUC 071200040706) |
Cited to the EPA ICIS-NPDES permit file (ECHO download).
Effluent limits and exceedances
- 33Pollutants on file
- 33Under a numeric limit
- 10With 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 |
|---|---|---|---|---|---|
| Coliform, fecal general | 2 | 40 | 40 | January 31, 2026 | 99,999% over the limit |
| Nitrogen, ammonia total [as N] | 17 | 23 | 22 | July 31, 2023 | 1,013% over the limit |
| Solids, total suspended | 8 | 14 | 12 | April 30, 2014 | 190% over the limit |
| BOD, 5-day, 20 deg. C | 4 | 3 | 3 | May 31, 2013 | 233% over the limit |
| Phosphorus, total [as P] | 6 | 20 | 1 | September 30, 2025 | 10% over the limit |
| Oxygen, dissolved [DO] | 7 | 1 | 1 | February 28, 2009 | 22% over the limit |
| BOD, carbonaceous [5 day, 20 C] | 4 | 6 | 0 | ||
| Flow, in conduit or thru treatment plant | 4 | 4 | 0 | ||
| Chlorine, total residual | 3 | 1 | 0 | ||
| Nitrogen, total [as N] | 1 | 1 | 0 | ||
| pH | 4 | 0 | 0 | ||
| Oil & Grease | 2 | 0 | 0 | ||
| Cyanide, weak acid, dissociable | 2 | 0 | 0 | ||
| Cyanide, total [as CN] | 2 | 0 | 0 | ||
| Fluoride, total [as F] | 2 | 0 | 0 | ||
| Arsenic, total [as As] | 2 | 0 | 0 | ||
| Barium, total [as Ba] | 2 | 0 | 0 | ||
| Cadmium, total [as Cd] | 2 | 0 | 0 | ||
| Chromium, hexavalent [as Cr] | 2 | 0 | 0 | ||
| Chromium, total [as Cr] | 2 | 0 | 0 | ||
| Copper, total [as Cu] | 2 | 0 | 0 | ||
| Iron, total [as Fe] | 2 | 0 | 0 | ||
| Iron, dissolved [as Fe] | 2 | 0 | 0 | ||
| Lead, total [as Pb] | 2 | 0 | 0 | ||
| Manganese, total [as Mn] | 2 | 0 | 0 | ||
| Nickel, total [as Ni] | 2 | 0 | 0 | ||
| Silver, total [as Ag] | 2 | 0 | 0 | ||
| Zinc, total [as Zn] | 2 | 0 | 0 | ||
| Selenium, total [as Se] | 2 | 0 | 0 | ||
| Phenolics, total recoverable | 2 | 0 | 0 | ||
| Mercury, total [as Hg] | 2 | 0 | 0 | ||
| Flow, total | 2 | 0 | 0 | ||
| Chloride [as Cl] | 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 |
|---|---|---|
| December 16, 2025 | Dry-weather SSO 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, IL0065188.
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 IL0065188 there.
Nearby on the register
- Discharge permits in Burr Ridge
- Every permit record in Burr Ridge, 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.