St Ignace WWTP
Saint Ignace, MI · Mackinac County · Publicly Owned Treatment Works
- Average flow
- 0.29 MGD
- Design flow
- —
- NPDES permit
- MI0020699
- Administratively continued
- Permit expires
- October 2025
- Population served
- 2,729
- CWNS 2022
St Ignace WWTP is a publicly owned wastewater treatment works in Saint Ignace, Mackinac County, Michigan treating an average of 0.29 million gallons per day, serving about 2,729 residents. It discharges under NPDES permit MI0020699 (administratively continued), which expires in October 2025, with 6 recorded violations in the last three years.
Treatment technology
Treatment structures identified at this facility. Exact unit counts are available in Klarifi.
Treatment structure data not yet analyzed for this facility.
Compliance snapshot (last 3 years)
- Total violations
- 6
- Effluent violations
- 6
Based on NPDES Discharge Monitoring Reports. Full violation history, parameters and discharge data available in the Klarifi platform.
Capital improvement projects in Saint Ignace
Saint Ignace's capital improvement plan lists 6 water, sewer and wastewater line items worth $2M starting 2025–2028. The largest budgeted items are shown here.
All water and sewer capital projects in Saint Ignace →
| Project | Budget | Years |
|---|---|---|
| Replace Water Mains (591 RR&I) | $1,497,000 | 2027–2027 |
| Rehabilitate Water Treatment Plant Equipment (591 RR&I) | $180,000 | 2025–2026 |
| New Huron Street Lift Station | $100,000 | 2026–2026 |
| Rehabilitate Water Treatment Plant Equipment (591 RR&I) | $87,000 | 2027–2027 |
| Marley Street High-Capacity Pump (591 RR&I) | $75,000 | 2028–2028 |
Full project details — scope, funding source, engineering consultant and the decision-makers behind each project — are available in Klarifi, along with similar wastewater capital projects in other cities.
Key contacts
6 verified contacts for St Ignace WWTP, with validated emails and direct phone numbers.
Unlock 6 verified contacts (3 more than shown)
Names, validated emails and direct phone numbers for decision-makers at St Ignace WWTP, plus the full compliance history and discharge data.
Nearby wastewater treatment plants in Michigan
Mackinac Island · 6 mi away
0.54 MGD
Mackinaw City · 10 mi away
0.31 MGD
Cheboygan · 22 mi away
0.84 MGD
Rudyard · 23 mi away
—
Kincheloe · 28 mi away
0.45 MGD
Brimley · 35 mi away
—
Petoskey · 38 mi away
1.03 MGD
Onaway · 45 mi away
—
St Ignace WWTP: frequently asked questions
Sources and methodology
Flow, permit and violation figures come from the EPA's ICIS-NPDES discharge monitoring records. Population served comes from the Clean Watersheds Needs Survey 2022. Treatment structures are identified by Klarifi's review of aerial imagery, and capital improvement projects are extracted from published municipal budget documents. Violations are counted over the last three years of monitoring reports.
Data refreshed September 11, 2026; facility record last updated November 16, 2024.