Clean Water Act discharge permit · NPDES MI0024295
WARREN WWTP, Warren, MI: NPDES MI0024295 discharge permit, effluent exceedances, inspections, penalties
- Administratively continuedPermit status
- MajorDischarger class
- 28Pollutants under a numeric limit
- 7Pollutants with an effluent exceedance
WARREN WWTP, held by City of Warren, holds NPDES permit MI0024295. EPA’s file records it issued July 26, 2017 and expiring October 1, 2020. The status and dates are as EPA’s permit file stood when Velarion loaded it (October 14, 2026); EPA’s free Detailed Facility Report on ECHO carries the permit’s current standing.
Identity
| Facility as filed | WARREN WWTP |
|---|---|
| Permittee as filed | City of Warren |
| NPDES ID | MI0024295 |
| 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 | July 26, 2017 |
| Expiration date | October 1, 2020 |
| Issuing agency | State |
| Address | Warren, MI 48093 |
| Receiving water impaired | 303(D) Listed |
| Subwatershed | Big Beaver Creek (HUC 040900030203) |
| Program components on file | Biosolids, POTW, Pretreatment |
| NAICS | 221320 – Sewage Treatment Facilities |
| SIC | 4952 – Sewerage Systems |
| Other EPA IDs (FRS) | RCRA handler MID078409653; ICIS-AIR source MI00000000000B1792 |
Cited to the EPA ICIS-NPDES permit file (ECHO download) and EPA’s NAICS/SIC and component files, the same download; cross-program IDs from EPA’s FRS facility-registry crosswalk.
Effluent limits and exceedances
- 35Pollutants on file
- 28Under a numeric limit
- 33With a violation of any kind
- 7With 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 |
|---|---|---|---|---|---|
| BOD, carbonaceous [5 day, 20 C] | 12 | 45 | 13 | November 30, 2024 | 99,999% over the limit |
| Nitrogen, ammonia total [as N] | 12 | 23 | 11 | November 30, 2025 | 327% over the limit |
| Coliform, fecal general | 2 | 22 | 8 | August 31, 2024 | 99,999% over the limit |
| Cyanide [A] | 4 | 12 | 8 | March 31, 2018 | 79% over the limit |
| BOD, carb-5 day, 20 deg C, percent removal | 0 | 15 | 1 | October 31, 2016 | 29% over the limit |
| Phosphorus, total [as P] | 4 | 11 | 1 | August 31, 2025 | 10% over the limit |
| Toxicity, final conc toxicity units | 0 | 1 | 1 | October 31, 2005 | 460% over the limit |
| Flow, in conduit or thru treatment plant | 6 | 34 | 0 | ||
| Solids, total suspended | 8 | 28 | 0 | ||
| Solids, suspended percent removal | 0 | 14 | 0 | ||
| pH | 2 | 12 | 0 | ||
| Cyanide, free [amenable to chlorination] | 0 | 12 | 0 | ||
| Oxygen, dissolved [DO] | 1 | 7 | 0 | ||
| Chlorine, total residual | 1 | 7 | 0 | ||
| Solids, total | 3 | 3 | 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 | ||
| Mercury, total [as Hg] | 6 | 2 | 0 | ||
| Selenium, total [as Se] | 2 | 2 | 0 | ||
| Copper, total [as Cu] | 0 | 2 | 0 | ||
| Thallium, total [as Tl] | 0 | 2 | 0 | ||
| Toxicity [acute], Ceriodaphnia dubia | 0 | 1 | 0 | ||
| Silver, total [as Ag] | 4 | 0 | 0 | ||
| Di[2-ethylhexyl] phthalate [DEHP] | 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
- 11Single-event violations
| Date | What EPA recorded | Agency |
|---|---|---|
| April 9, 2025 | Failure to enforce standards, local limits, and reporting requirements (>15% SNC SIU) (Level II) | ST6 |
| July 20, 2023 | Management Practice Violations - Improper Operation and Maintenance | ST6 |
| July 20, 2023 | Monitoring Violations - Invalid/Unrepresentative Sample | ST6 |
| November 21, 2022 | Reporting Violations - Late Submittal of DMRs | ST6 |
| March 30, 2021 | Monitoring Violations - Failure to Monitor for Non-Toxicity Requirements | ST6 |
| September 16, 2020 | Pretreatment - Failure to Develop/Enforce Standards | ST6 |
| September 16, 2020 | Failure to enforce standards, local limits, and reporting requirements (>15% SNC SIU) (Level II) | ST6 |
| February 14, 2019 | Monitoring Violations - Improper Analysis or Lab Error | ST6 |
| January 30, 2018 | Pretreatment - Failure to Develop/Enforce Standards | ST6 |
| January 30, 2018 | Failure to enforce standards, local limits, and reporting requirements (>15% SNC SIU) (Level II) | ST6 |
| October 26, 2017 | Effluent Violations - Narrative Effluent Violation | 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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Figures from EPA’s ICIS-NPDES download, loaded October 14, 2026.