Clean Water Act discharge permit · NPDES MI0020117
COLDWATER WRRF, Coldwater, MI: NPDES MI0020117 discharge permit, effluent exceedances, inspections, penalties
- Administratively continuedPermit status
- MajorDischarger class
- 25Pollutants under a numeric limit
- 5Pollutants with an effluent exceedance
COLDWATER WRRF, held by Coldwater Board of Public Utilities, holds NPDES permit MI0020117, which discharges to South Lake. EPA’s file records it issued September 29, 2017 and expiring October 1, 2021. The status and dates are as EPA’s permit file stood when Velarion loaded it (September 14, 2026); EPA’s free Detailed Facility Report on ECHO carries the permit’s current standing.
Identity
| Facility as filed | COLDWATER WRRF |
|---|---|
| Permittee as filed | Coldwater Board of Public Utilities |
| NPDES ID | MI0020117 |
| 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 | September 29, 2017 |
| Expiration date | October 1, 2021 |
| Issuing agency | State |
| Address | Coldwater, MI 49036 |
| Receiving water | South Lake |
| Subwatershed | Mud Creek (HUC 040500010108) |
Cited to the EPA ICIS-NPDES permit file (ECHO download).
Effluent limits and exceedances
- 25Pollutants on file
- 25Under a numeric limit
- 11With a violation of any kind
- 5With 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 |
|---|---|---|---|---|---|
| Nitrogen, ammonia total [as N] | 8 | 23 | 11 | July 31, 2024 | 650% over the limit |
| Coliform, fecal general | 2 | 42 | 6 | May 31, 2026 | 21% over the limit |
| Phosphorus, total [as P] | 5 | 39 | 5 | July 31, 2020 | 100% over the limit |
| pH | 2 | 36 | 2 | August 31, 2012 | |
| Arsenic, dry weight | 3 | 2 | 2 | September 30, 2025 | 27% over the limit |
| Mercury, total [as Hg] | 6 | 255 | 0 | ||
| Flow, in conduit or thru treatment plant | 2 | 34 | 0 | ||
| BOD, carbonaceous [5 day, 20 C] | 12 | 24 | 0 | ||
| Oxygen, dissolved [DO] | 1 | 19 | 0 | ||
| BOD, carb-5 day, 20 deg C, percent removal | 2 | 5 | 0 | ||
| Solids, suspended percent removal | 2 | 5 | 0 | ||
| Solids, total suspended | 8 | 0 | 0 | ||
| Solids, total | 3 | 0 | 0 | ||
| Selenium, dry weight | 3 | 0 | 0 | ||
| Copper, dry weight | 3 | 0 | 0 | ||
| Cadmium, dry weight | 3 | 0 | 0 | ||
| Nitrogen, total Kjeldahl | 3 | 0 | 0 | ||
| Molybdenum, sludge, total, dry weight [as Mo] | 3 | 0 | 0 | ||
| Zinc, sludge, total, dry weight [as Zn] | 3 | 0 | 0 | ||
| Lead, sludge, total, dry weight [as Pb] | 3 | 0 | 0 | ||
| Nickel, sludge, total, dry weight [as Ni] | 3 | 0 | 0 | ||
| Nitrogen, sludge, total, dry weight [as N] | 3 | 0 | 0 | ||
| Mercury, sludge, total, dry weight [as Hg] | 3 | 0 | 0 | ||
| Potassium, sludge, total, dry weight [as K] | 3 | 0 | 0 | ||
| Phosphorus, sludge, total, dry weight [as P] | 3 | 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
- 5Single-event violations
| Date | What EPA recorded | Agency |
|---|---|---|
| April 14, 2023 | WW Storm Water Non-Construction - Failure to develop any or adequate SWPPP/SWMP | ST6 |
| January 16, 2019 | Pretreatment - Failure to Develop/Enforce Standards | ST6 |
| January 16, 2019 | Failure to enforce standards, local limits, and reporting requirements (>15% SNC SIU) (Level II) | ST6 |
| December 3, 2018 | Monitoring Violations - Improper Analysis or Lab Error | ST6 |
| March 7, 2017 | WW Storm Water Non-Construction - Failure to develop any or adequate SWPPP/SWMP | ST6 |
Velarion’s copy of EPA’s ICIS-NPDES files does not yet 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
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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 MI0020117 there.
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Figures from EPA’s ICIS-NPDES download, loaded September 14, 2026.