NPDES MI0058238 · Clean Water Act
GREEN OAK TWP WTP, South Lyon, MI: NPDES MI0058238 discharge permit, effluent exceedances, inspections, penalties
GREEN OAK TWP WTP, South Lyon, Michigan: Individual permit MI0058238, held by Green Oak Charter Township; Administratively continued; issued September 19, 2017, term to October 1, 2022, by State; discharges to Ten Mile Lake.
- Chlorine, total residual: 2 limits, 72 violations of any kind, 4 effluent exceedances, latest December 31, 2021, largest 1,111% over the limit.
- Solids, total suspended: 2 limits, 74 violations of any kind, 3 effluent exceedances, latest December 31, 2017, largest 80% over the limit.
- Flow, in conduit or thru treatment plant: 2 limits, 72 violations of any kind.
- Iron, total [as Fe]: 2 limits, 44 violations of any kind.
- Outfall observation,visual, y/n response: 1 limit, 36 violations of any kind.
- Arsenic, total [as As]: 1 limit, 28 violations of any kind.
- pH: 2 limits, 15 violations of any kind.
- Phosphorus, total [as P]: 1 limit, 12 violations of any kind.
- Chlorination duration: 1 limit, 11 violations of any kind.
- Solids, total dissolved: 1 limit, 9 violations of any kind.
- Oxygen, dissolved [DO]: 1 limit, 8 violations of any kind.
- Chloride [as Cl]: 0 limits, 3 violations of any kind.
- Flow, total: 0 limits, 3 violations of any kind.
- March 21, 2026: Reporting Violations - Late Submittal of DMRs (ST6).
- February 21, 2026: Reporting Violations - Late Submittal of DMRs (ST6).
- November 21, 2025: Reporting Violations - Late Submittal of DMRs (ST6).
- October 21, 2025: Reporting Violations - Late Submittal of DMRs (ST6).
- August 21, 2025: Reporting Violations - Late Submittal of DMRs (ST6).
- December 21, 2022: Reporting Violations - Late Submittal of DMRs (ST6).
- June 21, 2022: Reporting Violations - Late Submittal of DMRs (ST6).
- October 21, 2021: Reporting Violations - Late Submittal of DMRs (ST6).
- September 21, 2021: Reporting Violations - Late Submittal of DMRs (ST6).
- August 21, 2021: Reporting Violations - Late Submittal of DMRs (ST6).
- June 21, 2021: Reporting Violations - Late Submittal of DMRs (ST6).
- May 21, 2021: Reporting Violations - Late Submittal of DMRs (ST6).
- September 21, 2020: Reporting Violations - Late Submittal of DMRs (ST6).
- February 21, 2019: Reporting Violations - Late Submittal of DMRs (ST6).
GREEN OAK TWP WTP among its neighbors
5 discharge permits are in the Davis Creek subwatershed (HUC 040900050110); MI0058238 is one. Its county: 124, 6 major; MI0058238 is minor permit.
Other permits in the Davis Creek subwatershed (HUC 040900050110)
- CARDNO-NUISANCE PLANT, Brighton: MIG031095, minor, term to 2027-02-01
- GORDON FOOD SERV-GREEN OAKS, Brighton: MI0060297, minor, term to 2028-10-01
- GORDON FOOD SERV-GREEN OAKS, Brighton: MIS410787, minor, term to 2024-04-01
- WOODLAND RIDGE, South Lyon: MI0058426, minor, term to 2013-09-30
Identity
| Facility | GREEN OAK TWP WTP |
|---|---|
| Permittee | Green Oak Charter Township |
| NPDES ID | MI0058238 |
| Status | Administratively continued |
| Type | Individual permit |
| Class | Minor |
| Facility type | Non-POTW |
| Issued | September 19, 2017 |
| Expires | October 1, 2022 |
| Agency | State |
| Address | South Lyon, MI 48178 |
| Receiving water | Ten Mile Lake |
| Receiving water impaired | 303(D) Listed |
| Subwatershed | Davis Creek (HUC 040900050110) |
NPDES MI0058238: effluent limits and exceedances
GREEN OAK TWP WTP (NPDES MI0058238): 13 pollutants on file, 11 limited; 13 with a violation of any kind, 2 with an exceedance.
| Pollutant | Limits | Violations | Exceedances | Latest | Largest, as filed |
|---|---|---|---|---|---|
| Chlorine, total residual | 2 | 72 | 4 | December 31, 2021 | 1,111% over the limit |
| Solids, total suspended | 2 | 74 | 3 | December 31, 2017 | 80% over the limit |
| Flow, in conduit or thru treatment plant | 2 | 72 | 0 | ||
| Iron, total [as Fe] | 2 | 44 | 0 | ||
| Outfall observation,visual, y/n response | 1 | 36 | 0 | ||
| Arsenic, total [as As] | 1 | 28 | 0 | ||
| pH | 2 | 15 | 0 | ||
| Phosphorus, total [as P] | 1 | 12 | 0 | ||
| Chlorination duration | 1 | 11 | 0 | ||
| Solids, total dissolved | 1 | 9 | 0 | ||
| Oxygen, dissolved [DO] | 1 | 8 | 0 | ||
| Chloride [as Cl] | 0 | 3 | 0 | ||
| Flow, total | 0 | 3 | 0 |
NPDES MI0058238: inspections, violations and enforcement
NPDES MI0058238: 14 single-event violations
| Date | What EPA recorded | Agency |
|---|---|---|
| March 21, 2026 | Reporting Violations - Late Submittal of DMRs | ST6 |
| February 21, 2026 | Reporting Violations - Late Submittal of DMRs | ST6 |
| November 21, 2025 | Reporting Violations - Late Submittal of DMRs | ST6 |
| October 21, 2025 | Reporting Violations - Late Submittal of DMRs | ST6 |
| August 21, 2025 | Reporting Violations - Late Submittal of DMRs | ST6 |
| December 21, 2022 | Reporting Violations - Late Submittal of DMRs | ST6 |
| June 21, 2022 | Reporting Violations - Late Submittal of DMRs | ST6 |
| October 21, 2021 | Reporting Violations - Late Submittal of DMRs | ST6 |
| September 21, 2021 | Reporting Violations - Late Submittal of DMRs | ST6 |
| August 21, 2021 | Reporting Violations - Late Submittal of DMRs | ST6 |
| June 21, 2021 | Reporting Violations - Late Submittal of DMRs | ST6 |
| May 21, 2021 | Reporting Violations - Late Submittal of DMRs | ST6 |
| September 21, 2020 | Reporting Violations - Late Submittal of DMRs | ST6 |
| February 21, 2019 | Reporting Violations - Late Submittal of DMRs | ST6 |
NPDES MI0058238 (GREEN OAK TWP WTP): no inspection, formal enforcement action and informal enforcement action on file.
Watch NPDES MI0058238
NPDES MI0058238: one email when its EPA record changes — $99/month.
Permits near NPDES MI0058238
NPDES MI0058238: 13 pollutant rows, 14 dated events; ICIS-NPDES download, loaded September 15, 2026.