Clean Water Act discharge permit · NPDES MI0021024
MARLETTE WWTP, Marlette, MI: NPDES MI0021024 discharge permit, effluent exceedances, inspections, penalties
- Administratively continuedPermit status
- MinorDischarger class
- 25Pollutants under a numeric limit
- 8Pollutants with an effluent exceedance
MARLETTE WWTP, held by City of Marlette, holds NPDES permit MI0021024, which discharges to Duff Creek. EPA’s file records it issued July 9, 2013 and expiring October 1, 2017. 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 | MARLETTE WWTP |
|---|---|
| Permittee as filed | City of Marlette |
| NPDES ID | MI0021024 |
| Permit status | Administratively continued (past its expiration date and still in force until reissued) |
| Permit type | Individual permit |
| Discharger class | Minor discharger |
| Facility type | Publicly owned treatment works |
| Program | Publicly owned treatment works |
| Issued | July 9, 2013 |
| Expiration date | October 1, 2017 |
| Issuing agency | State |
| Address | Marlette, MI 48453 |
| Receiving water | Duff Creek |
| Subwatershed | Duff Creek-South Branch Cass River (HUC 040802050102) |
| Other EPA IDs (FRS) | RCRA handler MID000722447 |
Cited to the EPA ICIS-NPDES permit file (ECHO download); cross-program IDs from EPA’s FRS facility-registry crosswalk.
Effluent limits and exceedances
- 26Pollutants on file
- 25Under a numeric limit
- 25With a violation of any kind
- 8With 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] | 8 | 408 | 45 | July 31, 2014 | 1,015% over the limit |
| Nitrogen, ammonia total [as N] | 14 | 165 | 35 | September 30, 2025 | 840% over the limit |
| Coliform, fecal general | 2 | 68 | 18 | May 31, 2026 | 187% over the limit |
| Solids, total suspended | 12 | 111 | 16 | November 30, 2023 | 182% over the limit |
| Phosphorus, total [as P] | 4 | 60 | 9 | May 31, 2025 | 2,008% over the limit |
| Solids, suspended percent removal | 2 | 19 | 9 | March 31, 2023 | 283% over the limit |
| Oxygen, dissolved [DO] | 1 | 34 | 8 | May 31, 2025 | 41% over the limit |
| BOD, carbonaceous [5 day, 20 C] | 16 | 209 | 6 | May 31, 2020 | 33% over the limit |
| pH | 2 | 51 | 0 | ||
| Flow, in conduit or thru treatment plant | 2 | 50 | 0 | ||
| Solids, total | 3 | 6 | 0 | ||
| Arsenic, dry weight | 3 | 6 | 0 | ||
| Selenium, dry weight | 3 | 6 | 0 | ||
| Copper, dry weight | 3 | 6 | 0 | ||
| Cadmium, dry weight | 3 | 6 | 0 | ||
| Nitrogen, total Kjeldahl | 3 | 6 | 0 | ||
| Molybdenum, sludge, total, dry weight [as Mo] | 3 | 6 | 0 | ||
| Zinc, sludge, total, dry weight [as Zn] | 3 | 6 | 0 | ||
| Lead, sludge, total, dry weight [as Pb] | 3 | 6 | 0 | ||
| Nickel, sludge, total, dry weight [as Ni] | 3 | 6 | 0 | ||
| Nitrogen, sludge, total, dry weight [as N] | 3 | 6 | 0 | ||
| Mercury, sludge, total, dry weight [as Hg] | 3 | 6 | 0 | ||
| Potassium, sludge, total, dry weight [as K] | 3 | 6 | 0 | ||
| Phosphorus, sludge, total, dry weight [as P] | 3 | 6 | 0 | ||
| Sulfate, total [as SO4] | 0 | 1 | 0 | ||
| BOD, carb-5 day, 20 deg C, percent removal | 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 |
|---|---|---|
| October 31, 2022 | Reporting Violations - Late Submittal of DMRs | ST6 |
| May 25, 2019 | WW SSO - Discharge to Waters | ST6 |
| May 25, 2019 | Wet-weather SSO discharge to waters of the U.S. that may endanger health or the environment | 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.
Watch this permit
One permit holder, $99/month. Watch the register for one permit holder and the places and receiving waters tied to its permits. Choose “One permit holder” and enter this permit’s NPDES ID, MI0021024.
Start the watch
- One permit holder — $99/month
- One watershed — $2,990/year
- One state — $4,990/year
- The whole register — $18,000/year
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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 MI0021024 there.
Nearby on the register
Figures from EPA’s ICIS-NPDES download, loaded September 15, 2026.