Clean Water Act discharge permit · NPDES IL0022055
LAKE COUNTY PUBLIC WORKS DEPARTMENT, Buffalo Grove, IL: NPDES IL0022055 discharge permit, effluent exceedances, inspections, penalties
- Administratively continuedPermit status
- MajorDischarger class
- 37Pollutants under a numeric limit
- 8Pollutants with an effluent exceedance
LAKE COUNTY PUBLIC WORKS DEPARTMENT holds NPDES permit IL0022055, which discharges to Aptakisic Creek Trib To Des Plaines River. EPA’s file records it issued April 30, 2015 and expiring April 30, 2020. 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 | LAKE COUNTY PUBLIC WORKS DEPARTMENT |
|---|---|
| Permittee as filed | LAKE COUNTY PUBLIC WORKS DEPARTMENT |
| NPDES ID | IL0022055 |
| 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 | April 30, 2015 |
| Expiration date | April 30, 2020 |
| Address | Buffalo Grove, IL 60089 |
| Receiving water | APTAKISIC CREEK TRIB TO DES PLAINES RIVER |
| Subwatershed | McDonald Creek-Des Plaines River (HUC 071200040503) |
| 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
- 37Pollutants on file
- 37Under a numeric limit
- 25With a violation of any kind
- 8With 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 |
|---|---|---|---|---|---|
| Zinc, total [as Zn] | 3 | 65 | 11 | April 30, 2007 | 74% over the limit |
| Coliform, fecal general | 1 | 12 | 11 | September 30, 2023 | 99,999% over the limit |
| Chlorine, total residual | 2 | 11 | 6 | October 31, 2016 | 99,999% over the limit |
| Phosphorus, total [as P] | 4 | 6 | 6 | July 31, 2020 | 72% over the limit |
| Nickel, total [as Ni] | 3 | 6 | 5 | September 30, 2006 | 442% over the limit |
| Copper, total [as Cu] | 3 | 57 | 3 | August 31, 2006 | 98% over the limit |
| Nitrogen, ammonia total [as N] | 14 | 14 | 2 | October 31, 2002 | 12% over the limit |
| Oxygen, dissolved [DO] | 5 | 2 | 2 | June 30, 2016 | 38% over the limit |
| Lead, total [as Pb] | 3 | 6 | 0 | ||
| Flow, in conduit or thru treatment plant | 4 | 2 | 0 | ||
| Oil & Grease | 3 | 1 | 0 | ||
| Cyanide, weak acid, dissociable | 3 | 1 | 0 | ||
| Cyanide, total [as CN] | 3 | 1 | 0 | ||
| Fluoride, total [as F] | 3 | 1 | 0 | ||
| Arsenic, total [as As] | 3 | 1 | 0 | ||
| Barium, total [as Ba] | 3 | 1 | 0 | ||
| Cadmium, total [as Cd] | 3 | 1 | 0 | ||
| Chromium, hexavalent [as Cr] | 3 | 1 | 0 | ||
| Chromium, total [as Cr] | 3 | 1 | 0 | ||
| Iron, total [as Fe] | 3 | 1 | 0 | ||
| Iron, dissolved [as Fe] | 3 | 1 | 0 | ||
| Manganese, total [as Mn] | 3 | 1 | 0 | ||
| Silver, total [as Ag] | 3 | 1 | 0 | ||
| Phenolics, total recoverable | 3 | 1 | 0 | ||
| Mercury, total [as Hg] | 3 | 1 | 0 | ||
| Solids, total suspended | 5 | 0 | 0 | ||
| BOD, carbonaceous [5 day, 20 C] | 4 | 0 | 0 | ||
| Selenium, total [as Se] | 3 | 0 | 0 | ||
| pH | 2 | 0 | 0 | ||
| Temperature, water deg. fahrenheit | 1 | 0 | 0 | ||
| Specific conductance | 1 | 0 | 0 | ||
| BOD, 5-day, 20 deg. C | 1 | 0 | 0 | ||
| Alkalinity, total [as CaCO3] | 1 | 0 | 0 | ||
| Nitrogen, total [as N] | 1 | 0 | 0 | ||
| Nitrogen, Kjeldahl, total [as N] | 1 | 0 | 0 | ||
| Nitrite + Nitrate total [as N] | 1 | 0 | 0 | ||
| Phosphorus, dissolved | 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
- 7Single-event violations
| Date | What EPA recorded | Agency |
|---|---|---|
| September 1, 2026 | Dry-weather SSO, no discharge to waters of the U.S., that may endanger health or the environment | EP6 |
| July 15, 2026 | Dry-weather SSO discharge to waters of the U.S. that may endanger health or the environment | ST6 |
| July 1, 2026 | Dry-weather SSO discharge to waters of the U.S. that may endanger health or the environment | ST6 |
| April 18, 2026 | Dry-weather SSO, no discharge to waters of the U.S., that may endanger health or the environment | ST6 |
| May 9, 2025 | Dry-weather SSO discharge to waters of the U.S. that may endanger health or the environment | ST6 |
| February 21, 2025 | Dry-weather SSO, no discharge to waters of the U.S., that may endanger health or the environment | ST6 |
| December 2, 2024 | 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 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.