Clean Water Act discharge permit · NPDES MI0024066
LOCH ALPINE SA-SCIO-WEB WWTP, Ann Arbor, MI: NPDES MI0024066 discharge permit, effluent exceedances, inspections, penalties
- EffectivePermit status
- MinorDischarger class
- 28Pollutants under a numeric limit
- 9Pollutants with an effluent exceedance
- 0Inspections on file
- 0Formal enforcement actions
LOCH ALPINE SA-SCIO-WEB WWTP, held by Loch Alpine Sanitary Authority, holds NPDES permit MI0024066, which discharges to Huron River. EPA’s file records it issued September 28, 2018 and expiring October 1, 2022. The status and dates are as EPA’s permit file stood when Velarion loaded it (September 15, 2026); EPA’s free Detailed Facility Report on ECHO carries the permit’s current standing.
Identity
| Facility as filed | LOCH ALPINE SA-SCIO-WEB WWTP |
|---|---|
| Permittee as filed | Loch Alpine Sanitary Authority |
| NPDES ID | MI0024066 |
| Permit status | Effective |
| Permit type | Individual permit |
| Discharger class | Minor discharger |
| Facility type | Publicly owned treatment works |
| Program | Publicly owned treatment works |
| Issued | September 28, 2018 |
| Expiration date | October 1, 2022 |
| Issuing agency | State |
| Address | Ann Arbor, MI 48103 |
| Receiving water | Huron River |
| Receiving water impaired | 303(D) Listed |
| Subwatershed | Barton Pond-Huron River (HUC 040900050309) |
| Other EPA IDs (FRS) | RCRA handler MI0000052670 |
Cited to the EPA ICIS-NPDES permit file (ECHO download); cross-program IDs from EPA’s FRS facility-registry crosswalk.
Effluent limits and exceedances
- 28Pollutants on file
- 28Under a numeric limit
- 26With 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 |
|---|---|---|---|---|---|
| Solids, suspended percent removal | 4 | 59 | 26 | June 30, 2026 | 158% over the limit |
| BOD, carb-5 day, 20 deg C, percent removal | 2 | 47 | 14 | June 30, 2026 | 133% over the limit |
| Coliform, fecal general | 2 | 81 | 13 | March 31, 2025 | 924% over the limit |
| BOD, carbonaceous [5 day, 20 C] | 4 | 142 | 10 | February 28, 2026 | 168% over the limit |
| Phosphorus, total [as P] | 16 | 270 | 6 | June 30, 2023 | 36% over the limit |
| Solids, total suspended | 4 | 135 | 3 | February 28, 2026 | 60% over the limit |
| Chlorine, total residual | 1 | 36 | 3 | July 31, 2022 | 495% over the limit |
| pH | 2 | 68 | 2 | April 30, 2023 | |
| Mercury, total [as Hg] | 6 | 623 | 1 | October 31, 2018 | 20% over the limit |
| Flow, in conduit or thru treatment plant | 2 | 66 | 0 | ||
| Nitrogen, ammonia total [as N] | 2 | 52 | 0 | ||
| Oxygen, dissolved [DO] | 1 | 33 | 0 | ||
| Arsenic, dry weight | 3 | 10 | 0 | ||
| Zinc, sludge, total, dry weight [as Zn] | 3 | 10 | 0 | ||
| Solids, total | 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 | ||
| 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 | ||
| Cadmium, total [as Cd] | 1 | 0 | 0 | ||
| Copper, total [as Cu] | 1 | 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
- 2Single-event violations
| Date | What EPA recorded | Agency |
|---|---|---|
| August 22, 2023 | Monitoring Violations - Improper Analysis or Lab Error | ST6 |
| February 11, 2021 | Monitoring Violations - Improper Analysis or Lab Error | ST6 |
Inspections
EPA’s inspection file holds no inspection for NPDES MI0024066.
Formal enforcement and penalties
0 formal actions, 0 of them with a penalty assessed. Federal and state penalties are separate figures from separate authorities and are shown as each was filed, never added together.
Informal enforcement
EPA’s informal enforcement file holds no action for NPDES MI0024066.
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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- 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 MI0024066 there.
LOCH ALPINE SA-SCIO-WEB WWTP, Ann Arbor, Michigan: Individual permit MI0024066, held by Loch Alpine Sanitary Authority; Publicly owned treatment works; Effective; issued September 28, 2018, term to October 1, 2022, by State; discharges to Huron River.
2 of the 28 pollutants listed for NPDES MI0024066 have no violation or effluent exceedance.
- Solids, suspended percent removal: 4 limits, 59 violations of any kind, 26 effluent exceedances, latest June 30, 2026, largest 158% over the limit.
- BOD, carb-5 day, 20 deg C, percent removal: 2 limits, 47 violations of any kind, 14 effluent exceedances, latest June 30, 2026, largest 133% over the limit.
- Coliform, fecal general: 2 limits, 81 violations of any kind, 13 effluent exceedances, latest March 31, 2025, largest 924% over the limit.
- BOD, carbonaceous [5 day, 20 C]: 4 limits, 142 violations of any kind, 10 effluent exceedances, latest February 28, 2026, largest 168% over the limit.
- Phosphorus, total [as P]: 16 limits, 270 violations of any kind, 6 effluent exceedances, latest June 30, 2023, largest 36% over the limit.
- Solids, total suspended: 4 limits, 135 violations of any kind, 3 effluent exceedances, latest February 28, 2026, largest 60% over the limit.
- Chlorine, total residual: 1 limit, 36 violations of any kind, 3 effluent exceedances, latest July 31, 2022, largest 495% over the limit.
- pH: 2 limits, 68 violations of any kind, 2 effluent exceedances, latest April 30, 2023.
- Mercury, total [as Hg]: 6 limits, 623 violations of any kind, 1 effluent exceedance, latest October 31, 2018, largest 20% over the limit.
- Flow, in conduit or thru treatment plant: 2 limits, 66 violations of any kind.
- Nitrogen, ammonia total [as N]: 2 limits, 52 violations of any kind.
- Oxygen, dissolved [DO]: 1 limit, 33 violations of any kind.
- Arsenic, dry weight: 3 limits, 10 violations of any kind.
- Zinc, sludge, total, dry weight [as Zn]: 3 limits, 10 violations of any kind.
- Solids, total: 3 limits, 9 violations of any kind.
- Selenium, dry weight: 3 limits, 9 violations of any kind.
- Copper, dry weight: 3 limits, 9 violations of any kind.
- Cadmium, dry weight: 3 limits, 9 violations of any kind.
- Nitrogen, total Kjeldahl: 3 limits, 9 violations of any kind.
- Molybdenum, sludge, total, dry weight [as Mo]: 3 limits, 9 violations of any kind.
- Lead, sludge, total, dry weight [as Pb]: 3 limits, 9 violations of any kind.
- Nickel, sludge, total, dry weight [as Ni]: 3 limits, 9 violations of any kind.
- Nitrogen, sludge, total, dry weight [as N]: 3 limits, 9 violations of any kind.
- Mercury, sludge, total, dry weight [as Hg]: 3 limits, 9 violations of any kind.
- Potassium, sludge, total, dry weight [as K]: 3 limits, 9 violations of any kind.
- Phosphorus, sludge, total, dry weight [as P]: 3 limits, 9 violations of any kind.
- Cadmium, total [as Cd]: 1 limit.
- Copper, total [as Cu]: 1 limit.
- August 22, 2023: Monitoring Violations - Improper Analysis or Lab Error (ST6).
- February 11, 2021: Monitoring Violations - Improper Analysis or Lab Error (ST6).
Michigan holds 200 Publicly owned treatment works coverages of this permit type in EPA’s file; 102 were issued before MI0024066.
Coverages issued nearest MI0024066
- 2018-09-27: ANN ARBOR WWTP, Ann Arbor: MI0022217, held by City of Ann Arbor
- 2018-09-27: MARTIN RTB, Saint Clair Shores: MI0025453, held by Southeast Macomb Sanitary District
- 2018-09-27: CHAPATON RTB, Saint Clair Shores: MI0025585, held by 8 1/2 Mile Relief Drain Drainage District
- 2018-09-28: CHELSEA WWTP, Chelsea: MI0020737, held by City of Chelsea
- 2018-09-28: DEXTER WWTP, Dexter: MI0022829, held by Daniel Schlaff, City of Dexter
- 2018-10-15: MASON WWTP, Mason: MI0020435, held by City of Mason
- 2018-10-23: DIMONDALE/WINDSOR WWTP, Dimondale: MI0053562, held by Village of Dimondale
- 2018-10-23: GLADSTONE WWTP, Gladstone: MI0057676, held by City of Gladstone
- 2018-11-02: LEONI TWP WWTP, Jackson: MI0045942, held by Leoni Township
- 2018-11-07: SOUTH HURON VALLEY UTILITY AUTHORITY WWTP, Rockwood: MI0043800, held by South Huron Valley Utility Authority
LOCH ALPINE SA-SCIO-WEB WWTP among its neighbors
20 discharge permits are in the Barton Pond-Huron River subwatershed (HUC 040900050309); MI0024066 is one. Its county: 38, 5 major; MI0024066 is minor permit.
Other permits in the Barton Pond-Huron River subwatershed (HUC 040900050309)
- 950 GREENE STREET POOL-ANN ARBOR, Ann Arbor: MIG760057, minor, term to 2025-04-01
- ANN ARBOR MS4, Ann Arbor: MI0053856, major, term to 2006-10-01
- ANN ARBOR WFP, Ann Arbor: MIG640207, minor, term to 2020-04-01
- AVANT APARTMENTS - ANN ARBOR, Ann Arbor: MIG760085, minor, term to 2025-04-01
- BARTON HILLS MS4-WASHTENAW, Ann Arbor: MI0059361, minor, term to 2028-10-01
- BARTON HILLS MS4-WASHTENAW, Ann Arbor: MIS040025, minor, term to 2008-04-01
- BELL TOWER HOTEL, Ann Arbor: MIG250549, minor, term to 2028-04-01
- BROADWAY PARK WEST, Ann Arbor: MIG081276, minor, term to 2025-04-01
- DEXTER WFP, Dexter: MIG640205, minor, term to 2020-04-01
- FOUNDRY LOFTS, Ann Arbor: MIG760030, minor, term to 2020-04-01
Nearby on the register
- Discharge permits in Ann Arbor
- Every permit record in Ann Arbor, A to Z
- Discharge permits in Michigan
- Every permit record in Michigan, A to Z
Figures from EPA’s ICIS-NPDES download, loaded September 15, 2026.
What this page shows
This public-records page covers Clean Water Act NPDES permit MI0024066 for the LOCH ALPINE SA-SCIO-WEB WWTP in Ann Arbor, MI, held by Loch Alpine Sanitary Authority, with a listed permit status of Effective and a Minor Discharger class. The page lists 28 pollutants under a numeric limit and 9 pollutants with an effluent exceedance for this permit.