Union Twp WWTP
4511 E River Rd, Mt Pleasant, MI 48858 · Isabella County · Publicly Owned Treatment Works
- Average flow
- 1.25 MGD
- Design flow
- 2.4 MGD
- NPDES permit
- MI0055808
- Effective
- Permit expires
- May 2027
- Population served
- —
- CWNS 2022
Union Twp WWTP is a publicly owned wastewater treatment works in Mt Pleasant, Isabella County, Michigan treating an average of 1.25 million gallons per day against a permitted design capacity of 2.4 MGD. It discharges under NPDES permit MI0055808 (effective), which expires in May 2027, with 0 recorded violations in the last three years.
Treatment technology
2 treatment structures and unit processes identified at Union Twp WWTP.
Available with a free Klarifi account
See the full treatment train at Union Twp WWTP: structures, unit processes and planned upgrades, with exact unit counts.
Compliance snapshot (last 3 years)
- Total violations
- 0
- Effluent violations
- 0
Based on NPDES Discharge Monitoring Reports. Full violation history, parameters and discharge data available in the Klarifi platform.
Key contacts
Decision-makers at Union Twp WWTP.
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Nearby wastewater treatment plants in Michigan
Mount Pleasant · 1 mi away
2.26 MGD
Mount Pleasant · 4 mi away
0.26 MGD
Rosebush · 4 mi away
—
Shepherd · 8 mi away
0.33 MGD
Coleman · 13 mi away
1.51 MGD
Clare · 14 mi away
0.55 MGD
St. Louis · 17 mi away
1.01 MGD
Alma · 18 mi away
1.52 MGD
Union Twp 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 October 26, 2026; facility record last updated May 19, 2025.
Wastewater terms: POTW · MGD · NPDES permit · Inflow and infiltration · FOG · Equalization tank · all terms