Clean Water Act discharge permit · NPDES MIS410900
HOWMET WHITEHALL CASTING 1&3, Whitehall, MI: NPDES MIS410900 discharge permit, effluent exceedances, inspections, penalties
- EffectivePermit status
- MinorDischarger class
- 0Pollutants under a numeric limit
- 0Pollutants with an effluent exceedance
- 4Inspections on file
- 0Formal enforcement actions
HOWMET WHITEHALL CASTING 1&3, held by Howmet Aerospace, holds NPDES permit MIS410900, which discharges to White Lake. EPA’s file records it issued December 31, 2025 and expiring April 1, 2029.
HOWMET WHITEHALL CASTING 1&3, Whitehall, Michigan: Coverage under a general permit MIS410900, held by Howmet Aerospace; Effective; issued December 31, 2025, term to April 1, 2029, by State; discharges to White Lake.
- September 30, 2026: Reconnaissance without Sampling (S).
- July 17, 2026: Reconnaissance without Sampling (S).
- June 8, 2026: Reconnaissance without Sampling (S).
- June 2, 2026: Reconnaissance without Sampling (S).
HOWMET WHITEHALL CASTING 1&3 among its neighbors
EPA’s permit file holds 3 discharge permits in the White Lake-White River subwatershed (HUC 040601010904), MIS410900 among them.
Other permits in the White Lake-White River subwatershed (HUC 040601010904)
- KOCH CHEMICAL COMPANY, Muskegon: MIP000085, not classed
- WESCO#48 MONTAGUE, Montague: MIG081300, minor permit, discharging to White Lake, permit term to April 1, 2030
Identity
| Facility as filed | HOWMET WHITEHALL CASTING 1&3 |
|---|---|
| Permittee as filed | Howmet Aerospace |
| NPDES ID | MIS410900 |
| Permit status | Effective |
| Permit type | Coverage under a general permit |
| Discharger class | Minor discharger |
| Facility type | Not a publicly owned treatment works |
| Issued | December 31, 2025 |
| Expiration date | April 1, 2029 |
| Issuing agency | State |
| Address | Whitehall, MI 49461 |
| Receiving water | White Lake |
| Subwatershed | White Lake-White River (HUC 040601010904) |
| Other EPA IDs (FRS) | RCRA handler MID080345614; ICIS-AIR source MI00000000000B1889 |
Effluent limits and exceedances
- 0Pollutants on file
- 0Under a numeric limit
- 0With a violation of any kind
- 0With an effluent exceedance
EPA’s limits and effluent violation files hold no pollutant row for NPDES MIS410900.
Inspections, violations and enforcement
- 0Single-event violations
EPA’s single-event violation file, as loaded, holds no violation for NPDES MIS410900.
Inspections
| Date | What EPA recorded | Agency |
|---|---|---|
| September 30, 2026 | Reconnaissance without Sampling | S |
| July 17, 2026 | Reconnaissance without Sampling | S |
| June 8, 2026 | Reconnaissance without Sampling | S |
| June 2, 2026 | Reconnaissance without Sampling | S |
Formal enforcement and penalties
0 formal actions, 0 of them with a penalty assessed. Federal and state penalties are separate figures from separate authorities and are shown as each was filed, never added together.
Informal enforcement
EPA’s informal enforcement file holds no action for NPDES MIS410900.
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Nearby on the register
- Discharge permits in Whitehall
- Every permit record in Whitehall, A to Z
- Discharge permits in Michigan
- Every permit record in Michigan, A to Z
Figures from EPA’s ICIS-NPDES download, loaded September 15, 2026.