Clean Water Act discharge permit · NPDES MI0021113
HOWELL WWTP, Howell, MI: NPDES MI0021113 discharge permit, effluent exceedances, inspections, penalties
- Administratively continuedPermit status
- MajorDischarger class
- 32Pollutants under a numeric limit
- 12Pollutants with an effluent exceedance
HOWELL WWTP, held by City of Howell, holds NPDES permit MI0021113, which discharges to Marion And Genoa Drain. EPA’s file records it issued March 26, 2019 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 | HOWELL WWTP |
|---|---|
| Permittee as filed | City of Howell |
| NPDES ID | MI0021113 |
| 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 | March 26, 2019 |
| Expiration date | October 1, 2023 |
| Issuing agency | State |
| Address | Howell, MI 48843 |
| Receiving water | Marion and Genoa Drain |
| Receiving water impaired | 303(D) Listed |
| Subwatershed | Marion and Genoa Drain-South Branch Shiawasee River (HUC 040802030101) |
| Program components on file | Biosolids, POTW |
| NAICS | 221320 – Sewage Treatment Facilities |
| SIC | 4952 – Sewerage Systems |
| Other EPA IDs (FRS) | RCRA handler MIT270011224 |
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
- 34Pollutants on file
- 32Under a numeric limit
- 18With a violation of any kind
- 12With 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] | 13 | 88 | 40 | July 31, 2025 | 955% over the limit |
| BOD, carbonaceous [5 day, 20 C] | 16 | 83 | 19 | May 31, 2025 | 165% over the limit |
| Solids, total suspended | 4 | 67 | 19 | December 31, 2025 | 423% over the limit |
| Phosphorus, total [as P] | 4 | 40 | 16 | June 30, 2025 | 73% over the limit |
| pH | 2 | 38 | 14 | September 30, 2025 | |
| Oxygen, dissolved [DO] | 2 | 19 | 4 | November 30, 2022 | 10% over the limit |
| Coliform, fecal general | 2 | 27 | 3 | August 31, 2023 | 30% over the limit |
| Cyanide [A] | 0 | 7 | 3 | January 31, 2019 | 99,999% over the limit |
| Static 48 Hr Chronic Pimphales Promelas | 4 | 4 | 3 | January 31, 2026 | 327% over the limit |
| TU Static 24 Hr Acute Pimephales promelas | 1 | 2 | 2 | January 31, 2026 | 125% over the limit |
| Toxicity, choice of species | 4 | 3 | 1 | January 31, 2026 | 115% over the limit |
| Toxicity [acute], Ceriodaphnia dubia | 1 | 2 | 1 | January 31, 2026 | 122% over the limit |
| Mercury, total [as Hg] | 6 | 24 | 0 | ||
| Flow, in conduit or thru treatment plant | 2 | 24 | 0 | ||
| Chlorine, total residual | 1 | 9 | 0 | ||
| Perfluorooctanoic acid (PFOA) | 4 | 8 | 0 | ||
| Perfluorooctanesulfonate | 4 | 8 | 0 | ||
| Toxicity [chronic], Ceriodaphnia dubia | 0 | 4 | 0 | ||
| Solids, total | 3 | 0 | 0 | ||
| Arsenic, dry weight | 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 | ||
| BOD, carb-5 day, 20 deg C, percent removal | 2 | 0 | 0 | ||
| Solids, suspended 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
- 24Single-event violations
| Date | What EPA recorded | Agency |
|---|---|---|
| January 21, 2025 | Reporting Violations - Late Submittal of DMRs | ST6 |
| July 10, 2024 | Monitoring Violations - Invalid/Unrepresentative Sample | ST6 |
| July 10, 2024 | Failure to enforce standards, local limits, and reporting requirements (>15% SNC SIU) (Level II) | ST6 |
| July 10, 2024 | Failure to issue/reissue control mechanisms to at least 90% of SIU/CIUs w/in 6 months (Level II) | ST6 |
| April 18, 2024 | Monitoring Violations - Failure to Monitor for Non-Toxicity Requirements | ST6 |
| February 6, 2024 | Monitoring Violations - Analysis not Conducted | ST6 |
| October 31, 2023 | Reporting Violations - Late Submittal of DMRs | ST6 |
| August 21, 2023 | Reporting Violations - Late Submittal of DMRs | ST6 |
| May 21, 2023 | Reporting Violations - Late Submittal of DMRs | ST6 |
| January 18, 2023 | Monitoring Violations - Invalid/Unrepresentative Sample | ST6 |
| August 21, 2022 | Reporting Violations - Late Submittal of DMRs | ST6 |
| July 21, 2022 | Reporting Violations - Late Submittal of DMRs | ST6 |
| March 21, 2022 | Reporting Violations - Late Submittal of DMRs | ST6 |
| June 8, 2021 | WW SSO - Discharge to Waters | ST6 |
| June 8, 2021 | Monitoring Violations - Failure to Monitor for Non-Toxicity Requirements | ST6 |
| June 8, 2021 | Wet-weather SSO discharge to waters of the U.S. that may endanger health or the environment | ST6 |
| May 18, 2021 | WW SSO - Discharge to Waters | ST6 |
| May 18, 2021 | Wet-weather SSO discharge to waters of the U.S. that may endanger health or the environment | ST6 |
| January 21, 2020 | Reporting Violations - Late Submittal of DMRs | ST6 |
| January 1, 2019 | Monitoring Violations - Failure to Monitor for Non-Toxicity Requirements | ST6 |
| June 22, 2018 | Effluent Violations - Narrative Effluent Violation | ST6 |
| January 1, 2018 | Monitoring Violations - Failure to Monitor for Non-Toxicity Requirements | ST6 |
| March 17, 2017 | Pretreatment - Failure to Develop/Enforce Standards | ST6 |
| March 17, 2017 | Failure to enforce standards, local limits, and reporting requirements (>15% SNC SIU) (Level II) | 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.