Clean Water Act discharge permit · NPDES MI0056405
THORNTON FARMS SUBDIVISION, Dexter, MI: NPDES MI0056405 discharge permit, effluent exceedances, inspections, penalties
- Administratively continuedPermit status
- MinorDischarger class
- 25Pollutants under a numeric limit
- 9Pollutants with an effluent exceedance
THORNTON FARMS SUBDIVISION, held by Thornton Farms Home Owner's Association, holds NPDES permit MI0056405, which discharges to Frey Fitzsimmons Drain. EPA’s file records it issued January 22, 2020 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 | THORNTON FARMS SUBDIVISION |
|---|---|
| Permittee as filed | Thornton Farms Home Owner's Association |
| NPDES ID | MI0056405 |
| Permit status | Administratively continued (past its expiration date and still in force until reissued) |
| Permit type | Individual permit |
| Discharger class | Minor discharger |
| Facility type | Not a publicly owned treatment works |
| Issued | January 22, 2020 |
| Expiration date | October 1, 2023 |
| Issuing agency | State |
| Address | Dexter, MI 48130 |
| Receiving water | Frey Fitzsimmons Drain |
| Receiving water impaired | 303(D) Listed |
| Subwatershed | Sutton Lake-Mill Creek (HUC 040900050204) |
| NAICS | 813990 – Other Similar Organizations [except Business, Professional, Labor, and Political Organizations] |
| SIC | 8641 – Civic And Social Associations |
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
- 25Pollutants on file
- 25Under a numeric limit
- 25With a violation of any kind
- 9With 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 |
|---|---|---|---|---|---|
| Phosphorus, total [as P] | 10 | 212 | 74 | July 31, 2026 | 680% over the limit |
| Nitrogen, ammonia total [as N] | 16 | 122 | 31 | September 30, 2021 | 1,500% over the limit |
| Solids, total suspended | 8 | 123 | 27 | March 31, 2023 | 5,789% over the limit |
| BOD, carbonaceous [5 day, 20 C] | 8 | 272 | 19 | May 31, 2021 | 650% over the limit |
| Coliform, fecal general | 2 | 65 | 17 | July 31, 2017 | 6,050% over the limit |
| pH | 2 | 52 | 4 | April 30, 2018 | |
| Oxygen, dissolved [DO] | 2 | 65 | 1 | August 31, 2020 | 82% over the limit |
| BOD, carb-5 day, 20 deg C, percent removal | 2 | 18 | 1 | February 28, 2017 | 193% over the limit |
| Solids, suspended percent removal | 2 | 18 | 1 | February 28, 2017 | 101% over the limit |
| Solids, total dissolved | 4 | 100 | 0 | ||
| Flow, in conduit or thru treatment plant | 2 | 48 | 0 | ||
| Solids, total | 3 | 3 | 0 | ||
| Arsenic, dry weight | 3 | 3 | 0 | ||
| Selenium, dry weight | 3 | 3 | 0 | ||
| Copper, dry weight | 3 | 3 | 0 | ||
| Cadmium, dry weight | 3 | 3 | 0 | ||
| Nitrogen, total Kjeldahl | 3 | 3 | 0 | ||
| Molybdenum, sludge, total, dry weight [as Mo] | 3 | 3 | 0 | ||
| Zinc, sludge, total, dry weight [as Zn] | 3 | 3 | 0 | ||
| Lead, sludge, total, dry weight [as Pb] | 3 | 3 | 0 | ||
| Nickel, sludge, total, dry weight [as Ni] | 3 | 3 | 0 | ||
| Nitrogen, sludge, total, dry weight [as N] | 3 | 3 | 0 | ||
| Mercury, sludge, total, dry weight [as Hg] | 3 | 3 | 0 | ||
| Potassium, sludge, total, dry weight [as K] | 3 | 3 | 0 | ||
| Phosphorus, sludge, total, dry weight [as P] | 3 | 3 | 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 |
|---|---|---|
| August 22, 2019 | Permit Violations - Discharge Without a Valid Permit | ST6 |
| August 22, 2019 | Monitoring Violations - Invalid/Unrepresentative Sample | ST6 |
| January 21, 2019 | 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.
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 MI0056405 there.
Nearby on the register
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Figures from EPA’s ICIS-NPDES download, loaded October 14, 2026.