Clean Water Act discharge permit · NPDES MI0024287
OAKLAND CO WALLED LK NOVI WWTP, Novi, MI: NPDES MI0024287 discharge permit, effluent exceedances, inspections, penalties
- Administratively continuedPermit status
- MajorDischarger class
- 25Pollutants under a numeric limit
- 2Pollutants with an effluent exceedance
OAKLAND CO WALLED LK NOVI WWTP, held by Oakland County Water Resources Commissioner, holds NPDES permit MI0024287, which discharges to Walled Lake Branch. EPA’s file records it issued February 9, 2018 and expiring October 1, 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 | OAKLAND CO WALLED LK NOVI WWTP |
|---|---|
| Permittee as filed | Oakland County Water Resources Commissioner |
| NPDES ID | MI0024287 |
| 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 | February 9, 2018 |
| Expiration date | October 1, 2021 |
| Issuing agency | State |
| Address | Novi, MI 48377 |
| Receiving water | Walled Lake Branch |
| Receiving water impaired | 303(D) Listed |
| Subwatershed | Newburgh Lake-Middle River Rouge (HUC 040900040203) |
Cited to the EPA ICIS-NPDES permit file (ECHO download).
Effluent limits and exceedances
- 30Pollutants on file
- 25Under a numeric limit
- 29With a violation of any kind
- 2With 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] | 8 | 92 | 2 | November 30, 2005 | 83% over the limit |
| Oxygen, dissolved [DO] | 1 | 16 | 2 | August 31, 2004 | 9% over the limit |
| Copper, total [as Cu] | 0 | 120 | 0 | ||
| Solids, total suspended | 12 | 116 | 0 | ||
| BOD, carbonaceous [5 day, 20 C] | 12 | 116 | 0 | ||
| Silver, total [as Ag] | 0 | 60 | 0 | ||
| Selenium, total [as Se] | 0 | 60 | 0 | ||
| Mercury, total [as Hg] | 4 | 56 | 0 | ||
| Phosphorus, total [as P] | 6 | 34 | 0 | ||
| Flow, in conduit or thru treatment plant | 2 | 30 | 0 | ||
| Coliform, fecal general | 2 | 30 | 0 | ||
| pH | 2 | 28 | 0 | ||
| Zinc, total [as Zn] | 0 | 16 | 0 | ||
| Boron, total [as B] | 0 | 12 | 0 | ||
| Solids, total | 3 | 6 | 0 | ||
| Solids, suspended percent removal | 2 | 5 | 0 | ||
| Arsenic, dry weight | 3 | 3 | 0 | ||
| Selenium, dry weight | 3 | 3 | 0 | ||
| Copper, dry weight | 3 | 3 | 0 | ||
| Cadmium, dry weight | 3 | 3 | 0 | ||
| Nitrogen, total Kjeldahl | 3 | 3 | 0 | ||
| Molybdenum, sludge, total, dry weight [as Mo] | 3 | 3 | 0 | ||
| Zinc, sludge, total, dry weight [as Zn] | 3 | 3 | 0 | ||
| Lead, sludge, total, dry weight [as Pb] | 3 | 3 | 0 | ||
| Nickel, sludge, total, dry weight [as Ni] | 3 | 3 | 0 | ||
| Nitrogen, sludge, total, dry weight [as N] | 3 | 3 | 0 | ||
| Mercury, sludge, total, dry weight [as Hg] | 3 | 3 | 0 | ||
| Potassium, sludge, total, dry weight [as K] | 3 | 3 | 0 | ||
| Phosphorus, sludge, total, dry weight [as P] | 3 | 3 | 0 | ||
| Cyanide [A] | 4 | 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
- 4Single-event violations
| Date | What EPA recorded | Agency |
|---|---|---|
| July 15, 2025 | Reporting Violations - Failure to submit required report (non-DMR non-pretreatment) | ST6 |
| May 8, 2025 | Monitoring Violations - Invalid/Unrepresentative Sample | ST6 |
| January 21, 2025 | Reporting Violations - Late Submittal of DMRs | ST6 |
| June 17, 2021 | Monitoring Violations - Improper Analysis or Lab Error | 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
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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 MI0024287 there.
Nearby on the register
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Figures from EPA’s ICIS-NPDES download, loaded September 15, 2026.