Clean Water Act discharge permit · NPDES MI0004243
ST MARYS CEMENT-DETROIT, Detroit, MI: NPDES MI0004243 discharge permit, effluent exceedances, inspections, penalties
- Administratively continuedPermit status
- MinorDischarger class
- 10Pollutants under a numeric limit
- 4Pollutants with an effluent exceedance
ST MARYS CEMENT-DETROIT, held by St. Marys Cement Incorporated, holds NPDES permit MI0004243, which discharges to Rouge River. EPA’s file records it issued September 25, 2007 and expiring October 1, 2011. 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 | ST MARYS CEMENT-DETROIT |
|---|---|
| Permittee as filed | St. Marys Cement Incorporated |
| NPDES ID | MI0004243 |
| 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 | September 25, 2007 |
| Expiration date | October 1, 2011 |
| Issuing agency | State |
| Address | Detroit, MI 48209 |
| Receiving water | Rouge River |
| Receiving water impaired | 303(D) Listed |
| Subwatershed | Woodmere Cemetery-River Rouge (HUC 040900040407) |
| Other EPA IDs (FRS) | RCRA handler MID094553419; ICIS-AIR source MI00000000000B3567 |
Cited to the EPA ICIS-NPDES permit file (ECHO download); cross-program IDs from EPA’s FRS facility-registry crosswalk.
Effluent limits and exceedances
- 10Pollutants on file
- 10Under a numeric limit
- 10With a violation of any kind
- 4With 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 |
|---|---|---|---|---|---|
| Solids, total suspended | 24 | 1,586 | 100 | June 30, 2025 | 8,471% over the limit |
| pH | 4 | 304 | 30 | June 30, 2026 | |
| Temperature, water deg. fahrenheit | 5 | 369 | 24 | May 31, 2023 | 167% over the limit |
| Copper, total [as Cu] | 8 | 169 | 1 | August 31, 2018 | 23% over the limit |
| Flow, in conduit or thru treatment plant | 4 | 267 | 0 | ||
| Outfall observation,visual, y/n response | 2 | 136 | 0 | ||
| Zinc, total [as Zn] | 6 | 120 | 0 | ||
| Cadmium, total [as Cd] | 2 | 20 | 0 | ||
| Chromium, hexavalent [as Cr] | 2 | 20 | 0 | ||
| Vanadium, total [as V] | 2 | 20 | 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
- 22Single-event violations
| Date | What EPA recorded | Agency |
|---|---|---|
| September 3, 2025 | Management Practice Violations - Improper Operation and Maintenance | ST6 |
| January 21, 2024 | Reporting Violations - Late Submittal of DMRs | ST6 |
| February 21, 2023 | Reporting Violations - Late Submittal of DMRs | ST6 |
| May 21, 2022 | Reporting Violations - Late Submittal of DMRs | ST6 |
| September 21, 2020 | Reporting Violations - Late Submittal of DMRs | ST6 |
| August 6, 2020 | Management Practice Violations - Best Management Practice Deficiencies | ST6 |
| August 6, 2020 | Management Practice Violations - Improper Operation and Maintenance | ST6 |
| August 6, 2020 | Failure to eliminate or relocate industrial stormwater outfalls from identified sensitive areas | ST6 |
| August 6, 2020 | Other noncompliance related to industrial stormwater discharges | ST6 |
| June 21, 2020 | Reporting Violations - Late Submittal of DMRs | ST6 |
| May 21, 2020 | Reporting Violations - Late Submittal of DMRs | ST6 |
| April 21, 2020 | Reporting Violations - Late Submittal of DMRs | ST6 |
| March 21, 2020 | Reporting Violations - Late Submittal of DMRs | ST6 |
| December 21, 2018 | Reporting Violations - Late Submittal of DMRs | ST6 |
| May 21, 2018 | Reporting Violations - Late Submittal of DMRs | ST6 |
| November 21, 2017 | Reporting Violations - Late Submittal of DMRs | ST6 |
| October 21, 2017 | Reporting Violations - Late Submittal of DMRs | ST6 |
| September 21, 2017 | Reporting Violations - Late Submittal of DMRs | ST6 |
| August 21, 2017 | Reporting Violations - Late Submittal of DMRs | ST6 |
| July 11, 2017 | Management Practice Violations - Improper Operation and Maintenance | ST6 |
| April 21, 2017 | Reporting Violations - Late Submittal of DMRs | ST6 |
| January 21, 2017 | 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 MI0004243 there.
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Figures from EPA’s ICIS-NPDES download, loaded September 15, 2026.