Clean Water Act discharge permit · NPDES MIG640301
GM-PONTIAC ENGINEERING CENTER, Pontiac, MI: NPDES MIG640301 discharge permit, effluent exceedances, inspections, penalties
- EffectivePermit status
- MinorDischarger class
- 2Pollutants under a numeric limit
- 0Pollutants with an effluent exceedance
GM-PONTIAC ENGINEERING CENTER, held by General Motors LLC, holds NPDES permit MIG640301, which discharges to Clinton River. EPA’s file records it issued September 30, 2025 and expiring April 1, 2030. 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.
What the register holds for GM-PONTIAC ENGINEERING CENTER: its NPDES ID, its permit type and status, its dates, its address in Pontiac, Michigan, its receiving water, and 2 pollutants under a numeric limit. EPA’s effluent violation file and its single-event violation file hold no violation for NPDES MIG640301.
Identity
| Facility as filed | GM-PONTIAC ENGINEERING CENTER |
|---|---|
| Permittee as filed | General Motors LLC |
| NPDES ID | MIG640301 |
| Permit status | Effective |
| Permit type | Coverage under a general permit |
| Discharger class | Minor discharger |
| Facility type | Not a publicly owned treatment works |
| Issued | September 30, 2025 |
| Expiration date | April 1, 2030 |
| Issuing agency | State |
| Address | Pontiac, MI 48340 |
| Receiving water | Clinton River |
| Receiving water impaired | 303(D) Listed |
| Subwatershed | Pontiac Creek-Clinton River (HUC 040900030108) |
Cited to the EPA ICIS-NPDES permit file (ECHO download).
Effluent limits and exceedances
- 2Pollutants on file
- 2Under a numeric limit
- 0With a violation of any kind
- 0With 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 |
|---|---|---|---|---|---|
| Flow, in conduit or thru treatment plant | 2 | 0 | 0 | ||
| Outfall observation,visual, y/n response | 1 | 0 | 0 |
EPA’s effluent violation file records no exceedance of a numeric limit for NPDES MIG640301.
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
- 0Single-event violations
EPA’s single-event violation file, as loaded, holds no violation for NPDES MIG640301.
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, MIG640301.
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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 MIG640301 there.
Nearby on the register
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- Every permit record in Michigan, A to Z
Figures from EPA’s ICIS-NPDES download, loaded September 15, 2026.