Clean Water Act discharge permit · NPDES MI0020192
CARSON CITY WWSL, Carson City, MI: NPDES MI0020192 discharge permit, effluent exceedances, inspections, penalties
- Administratively continuedPermit status
- MinorDischarger class
- 22Pollutants under a numeric limit
- 4Pollutants with an effluent exceedance
CARSON CITY WWSL, held by City of Carson City, holds NPDES permit MI0020192, which discharges to Fish Creek. EPA’s file records it issued May 26, 2021 and expiring October 1, 2023. 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 | CARSON CITY WWSL |
|---|---|
| Permittee as filed | City of Carson City |
| NPDES ID | MI0020192 |
| 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 | May 26, 2021 |
| Expiration date | October 1, 2023 |
| Issuing agency | State |
| Address | Carson City, MI 48811 |
| Receiving water | Fish Creek |
| Subwatershed | Lower Fish Creek (HUC 040500050306) |
| NAICS | 221320 – Sewage Treatment Facilities |
| SIC | 4952 – Sewerage Systems |
Cited to the EPA ICIS-NPDES permit file (ECHO download) and EPA’s NAICS/SIC and component files, the same download.
Effluent limits and exceedances
- 22Pollutants on file
- 22Under a numeric limit
- 22With 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 |
|---|---|---|---|---|---|
| Coliform, fecal general | 2 | 41 | 6 | December 31, 2016 | 218% over the limit |
| Phosphorus, total [as P] | 4 | 20 | 3 | April 30, 2018 | 60% over the limit |
| BOD, 5-day, 20 deg. C | 22 | 99 | 2 | April 30, 2024 | 20% over the limit |
| Solids, total suspended | 4 | 64 | 2 | October 31, 2016 | 29% over the limit |
| pH | 2 | 34 | 0 | ||
| Flow, in conduit or thru treatment plant | 2 | 34 | 0 | ||
| Nitrogen, ammonia total [as N] | 2 | 17 | 0 | ||
| Oxygen, dissolved [DO] | 1 | 17 | 0 | ||
| Solids, total | 3 | 9 | 0 | ||
| Arsenic, dry weight | 3 | 9 | 0 | ||
| Selenium, dry weight | 3 | 9 | 0 | ||
| Copper, dry weight | 3 | 9 | 0 | ||
| Cadmium, dry weight | 3 | 9 | 0 | ||
| Nitrogen, total Kjeldahl | 3 | 9 | 0 | ||
| Molybdenum, sludge, total, dry weight [as Mo] | 3 | 9 | 0 | ||
| Zinc, sludge, total, dry weight [as Zn] | 3 | 9 | 0 | ||
| Lead, sludge, total, dry weight [as Pb] | 3 | 9 | 0 | ||
| Nickel, sludge, total, dry weight [as Ni] | 3 | 9 | 0 | ||
| Nitrogen, sludge, total, dry weight [as N] | 3 | 9 | 0 | ||
| Mercury, sludge, total, dry weight [as Hg] | 3 | 9 | 0 | ||
| Potassium, sludge, total, dry weight [as K] | 3 | 9 | 0 | ||
| Phosphorus, sludge, total, dry weight [as P] | 3 | 9 | 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
- 17Single-event violations
| Date | What EPA recorded | Agency |
|---|---|---|
| May 31, 2025 | Monitoring Violations - Failure to Monitor for Non-Toxicity Requirements | ST6 |
| October 31, 2024 | Reporting Violations - Late Submittal of DMRs | ST6 |
| June 21, 2024 | Reporting Violations - Late Submittal of DMRs | ST6 |
| August 25, 2021 | WW SSO - Discharge to Waters | ST6 |
| August 25, 2021 | Wet-weather SSO discharge to waters of the U.S. that may endanger health or the environment | ST6 |
| April 21, 2021 | Reporting Violations - Late Submittal of DMRs | ST6 |
| December 21, 2020 | Reporting Violations - Late Submittal of DMRs | ST6 |
| October 31, 2020 | Reporting Violations - Late Submittal of DMRs | ST6 |
| May 16, 2019 | Permit Violations - Unapproved Operation | ST6 |
| April 24, 2019 | Management Practice Violations - Improper Operation and Maintenance | ST6 |
| April 24, 2019 | Management Practice Violations - Failure to Maintain Records | ST6 |
| April 21, 2019 | Reporting Violations - Late Submittal of DMRs | ST6 |
| December 21, 2018 | Reporting Violations - Late Submittal of DMRs | ST6 |
| October 31, 2018 | Reporting Violations - Late Submittal of DMRs | ST6 |
| April 21, 2018 | Reporting Violations - Late Submittal of DMRs | ST6 |
| April 9, 2018 | Permit Violations - Discharge Without a Valid Permit | ST6 |
| December 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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Figures from EPA’s ICIS-NPDES download, loaded October 14, 2026.