Clean Water Act discharge permit · NPDES MIG580381
SUNSET RIDGE MHC-PORTLAND TWP, Portland, MI: NPDES MIG580381 discharge permit, effluent exceedances, inspections, penalties
- Administratively continuedPermit status
- MinorDischarger class
- 22Pollutants under a numeric limit
- 3Pollutants with an effluent exceedance
SUNSET RIDGE MHC-PORTLAND TWP, held by Sun Communities Operating Limited Partnership, holds NPDES permit MIG580381, which discharges to Grand River. EPA’s file records it issued January 8, 2020 and expiring April 1, 2024. The status and dates are as EPA’s permit file stood when Velarion loaded it (September 14, 2026); EPA’s free Detailed Facility Report on ECHO carries the permit’s current standing.
Identity
| Facility as filed | SUNSET RIDGE MHC-PORTLAND TWP |
|---|---|
| Permittee as filed | Sun Communities Operating Limited Partnership |
| NPDES ID | MIG580381 |
| Permit status | Administratively continued (past its expiration date and still in force until reissued) |
| Permit type | Coverage under a general permit |
| Discharger class | Minor discharger |
| Facility type | Not a publicly owned treatment works |
| Issued | January 8, 2020 |
| Expiration date | April 1, 2024 |
| Issuing agency | State |
| Address | Portland, MI 48875 |
| Receiving water | Grand River |
| Receiving water impaired | 303(D) Listed |
| Subwatershed | Cryderman Lake Drain-Grand River (HUC 040500040709) |
Cited to the EPA ICIS-NPDES permit file (ECHO download).
Effluent limits and exceedances
- 22Pollutants on file
- 22Under a numeric limit
- 22With a violation of any kind
- 3With 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 | 25 | 9 | April 30, 2025 | 179% over the limit |
| BOD, 5-day, 20 deg. C | 2 | 24 | 8 | May 31, 2022 | 515% over the limit |
| Solids, total suspended | 4 | 23 | 7 | November 30, 2020 | 226% over the limit |
| Flow, in conduit or thru treatment plant | 2 | 18 | 0 | ||
| pH | 2 | 16 | 0 | ||
| Nitrogen, ammonia total [as N] | 2 | 9 | 0 | ||
| Phosphorus, total [as P] | 2 | 9 | 0 | ||
| Oxygen, dissolved [DO] | 1 | 8 | 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
- 13Single-event violations
| Date | What EPA recorded | Agency |
|---|---|---|
| December 21, 2023 | Reporting Violations - Late Submittal of DMRs | ST6 |
| May 15, 2023 | Effluent Violations - Narrative Effluent Violation | ST6 |
| April 17, 2023 | Effluent Violations - Narrative Effluent Violation | ST6 |
| March 13, 2023 | Effluent Violations - Narrative Effluent Violation | ST6 |
| October 21, 2022 | Effluent Violations - Narrative Effluent Violation | ST6 |
| April 22, 2021 | Management Practice Violations - Improper Operation and Maintenance | ST6 |
| April 26, 2019 | Management Practice Violations - Failure to Maintain Records | ST6 |
| April 26, 2019 | Management Practice Violations - Improper Operation and Maintenance | ST6 |
| April 21, 2019 | Reporting Violations - Late Submittal of DMRs | ST6 |
| October 31, 2018 | Reporting Violations - Late Submittal of DMRs | ST6 |
| July 2, 2018 | WW SSO - Discharge to Waters | ST6 |
| July 2, 2018 | Wet-weather SSO discharge to waters of the U.S. that may endanger health or the environment | ST6 |
| October 31, 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.
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, MIG580381.
Start the watch
- One permit holder — $99/month
- One watershed — $2,990/year
- One state — $4,990/year
- The whole register — $18,000/year
How we handle your data → Privacy
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 MIG580381 there.
Nearby on the register
Figures from EPA’s ICIS-NPDES download, loaded September 14, 2026.