Isabella Reservation WWTP
Mount Pleasant, MI · Isabella County · Publicly Owned Treatment Works
- Average flow
- 0.33 MGD
- Design flow
- 0.58 MGD
- NPDES permit
- MI0054861
- Administratively continued
- Permit expires
- May 2023
- Population served
- —
- CWNS 2022
Isabella Reservation WWTP is a publicly owned wastewater treatment works in Mount Pleasant, Isabella County, Michigan treating an average of 0.33 million gallons per day against a permitted design capacity of 0.58 MGD. Treatment on site includes uncovered lagoons. It discharges under NPDES permit MI0054861 (administratively continued), which expires in May 2023, with 4 recorded violations in the last three years.
Treatment technology
Treatment structures identified at this facility. Exact unit counts are available in Klarifi.
Uncovered lagoons
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Compliance snapshot (last 3 years)
- Total violations
- 4
- Effluent violations
- 4
Based on NPDES Discharge Monitoring Reports. Full violation history, parameters and discharge data available in the Klarifi platform.
Capital improvement projects in Mount Pleasant
Mount Pleasant's capital improvement plan lists 70 water, sewer and wastewater line items worth $16M starting 2025–2030. The largest budgeted items are shown here.
All water and sewer capital projects in Mount Pleasant →
| Project | Budget | Years |
|---|---|---|
| Remove 10,000 Yds | $2,145,000 | 2025–2029 |
| Lime Residual Removal | $2,145,000 | 2025–2029 |
| Facility Improvements and Replacements | $1,278,000 | 2025–2030 |
| Distribution System Replacement | $1,008,000 | 2025–2030 |
| Lift Station Improvements and Replacements | $682,000 | 2025–2030 |
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
2 verified contacts for Isabella Reservation WWTP, with validated emails and direct phone numbers.
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Names, validated emails and direct phone numbers for decision-makers at Isabella Reservation WWTP, plus the full compliance history and discharge data.
Nearby wastewater treatment plants in Michigan
Mt Pleasant · 4 mi away
1.33 MGD
Mount Pleasant · 4 mi away
1.88 MGD
Rosebush · 7 mi away
—
St. Louis · 13 mi away
0.59 MGD
Coleman · 13 mi away
—
Alma · 14 mi away
1.01 MGD
Breckenridge · 16 mi away
—
Clare · 16 mi away
0.41 MGD
Isabella Reservation 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 5, 2025.