Clean Water Act discharge permit · NPDES MI0059217
DOW CHEMICAL FORMER WEST TANK FARM GWCU, Bay City, MI: NPDES MI0059217 discharge permit, effluent exceedances, inspections, penalties
- Administratively continuedPermit status
- MinorDischarger class
- 31Pollutants under a numeric limit
- 2Pollutants with an effluent exceedance
DOW CHEMICAL FORMER WEST TANK FARM GWCU, held by Dow Chemical Company, holds NPDES permit MI0059217, which discharges to Saginaw River. EPA’s file records it issued April 26, 2022 and expiring October 1, 2023. 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 | DOW CHEMICAL FORMER WEST TANK FARM GWCU |
|---|---|
| Permittee as filed | Dow Chemical Company |
| NPDES ID | MI0059217 |
| Permit status | Administratively continued (past its expiration date and still in force until reissued) |
| Permit type | Individual permit |
| Discharger class | Minor discharger |
| Facility type | Not a publicly owned treatment works |
| Issued | April 26, 2022 |
| Expiration date | October 1, 2023 |
| Issuing agency | State |
| Address | Bay City, MI 48706 |
| Receiving water | Saginaw River |
| Receiving water impaired | 303(D) Listed |
| Subwatershed | City of Bay City-Saginaw River (HUC 040802060204) |
Cited to the EPA ICIS-NPDES permit file (ECHO download).
Effluent limits and exceedances
- 33Pollutants on file
- 31Under a numeric limit
- 5With 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 |
|---|---|---|---|---|---|
| Mercury, total [as Hg] | 0 | 2 | 2 | June 30, 2017 | 23% over the limit |
| Phosphorus, total [as P] | 8 | 1 | 1 | September 30, 2024 | 10% over the limit |
| Ethylbenzene | 2 | 21 | 0 | ||
| Ethylbenzene | 2 | 18 | 0 | ||
| 2-Methylnaphthalene | 0 | 2 | 0 | ||
| Nitrogen, ammonia total [as N] | 8 | 0 | 0 | ||
| Solids, total dissolved | 8 | 0 | 0 | ||
| BOD, carbonaceous [5 day, 20 C] | 8 | 0 | 0 | ||
| Flow, in conduit or thru treatment plant | 6 | 0 | 0 | ||
| pH | 4 | 0 | 0 | ||
| Benzo[b]fluoranthene | 4 | 0 | 0 | ||
| Benzo[k]fluoranthene | 4 | 0 | 0 | ||
| Benzo[a]pyrene | 4 | 0 | 0 | ||
| Chrysene | 4 | 0 | 0 | ||
| Fluoranthene | 4 | 0 | 0 | ||
| Indeno[1,2,3-cd]pyrene | 4 | 0 | 0 | ||
| Phenanthrene | 4 | 0 | 0 | ||
| Benzo[a]anthracene | 4 | 0 | 0 | ||
| Dibenz[a,h]anthracene | 4 | 0 | 0 | ||
| Oxygen, dissolved [DO] | 2 | 0 | 0 | ||
| Benzene, ethylbenzene, toluene, xylene combination | 2 | 0 | 0 | ||
| Toluene | 2 | 0 | 0 | ||
| Benzene | 2 | 0 | 0 | ||
| Acenaphthylene | 2 | 0 | 0 | ||
| Acenaphthene | 2 | 0 | 0 | ||
| Anthracene | 2 | 0 | 0 | ||
| Fluorene | 2 | 0 | 0 | ||
| Pyrene | 2 | 0 | 0 | ||
| Benzo[ghi]perylene | 2 | 0 | 0 | ||
| Naphthalene | 2 | 0 | 0 | ||
| Equipment inspection - visual | 2 | 0 | 0 | ||
| Xylene [mix of m+o+p] | 2 | 0 | 0 | ||
| Outfall observation,visual, y/n response | 2 | 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
- 3Single-event violations
| Date | What EPA recorded | Agency |
|---|---|---|
| July 21, 2025 | Reporting Violations - Late Submittal of DMRs | ST6 |
| March 21, 2024 | Reporting Violations - Late Submittal of DMRs | ST6 |
| May 21, 2023 | Reporting Violations - Late Submittal of DMRs | 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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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 MI0059217 there.
Nearby on the register
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Figures from EPA’s ICIS-NPDES download, loaded September 15, 2026.