Plainwell WWTP
Plainwell, MI · Allegan County · Publicly Owned Treatment Works
- Average flow
- 0.31 MGD
- Design flow
- —
- NPDES permit
- MI0020494
- Administratively continued
- Permit expires
- October 2025
- Population served
- 6,315
- CWNS 2022
Plainwell WWTP is a publicly owned wastewater treatment works in Plainwell, Allegan County, Michigan treating an average of 0.31 million gallons per day, serving about 6,315 residents. Treatment on site includes clarifiers, biogas silos, biogas balloons. It discharges under NPDES permit MI0020494 (administratively continued), which expires in October 2025, with 3 recorded violations in the last three years.
Treatment technology
Treatment structures identified at this facility. Exact unit counts are available in Klarifi.
Compliance snapshot (last 3 years)
- Total violations
- 3
- Effluent violations
- 3
Based on NPDES Discharge Monitoring Reports. Full violation history, parameters and discharge data available in the Klarifi platform.
Capital improvement projects in Plainwell
Plainwell's capital improvement plan lists 11 water, sewer and wastewater line items worth $3M starting 2024–2030. The largest budgeted items are shown here.
All water and sewer capital projects in Plainwell →
| Project | Budget | Years |
|---|---|---|
| Replace Cushman St Lift Station | $1,000,000 | 2030–2031 |
| Replace All Plant MMC Panels | $800,000 | 2028–2029 |
| Ice pigging for Cushman forcemmain | $400,000 | 2027–2028 |
| Biotower/ biobed replacement | $250,000 | 2028–2029 |
| Water Tower Painting-Interior | $240,000 | 2024–2025 |
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 Plainwell WWTP, with validated emails and direct phone numbers.
Unlock 2 verified contacts
Names, validated emails and direct phone numbers for decision-makers at Plainwell WWTP, plus the full compliance history and discharge data.
Nearby wastewater treatment plants in Michigan
Kalamazoo · 11 mi away
24.94 MGD
Shelbyville · 11 mi away
0.54 MGD
Allegan · 12 mi away
0.67 MGD
Hopkins · 13 mi away
—
Caledonia · 20 mi away
—
Battle Creek · 21 mi away
7.55 MGD
Middleville · 22 mi away
—
Paw Paw · 22 mi away
0.12 MGD
Plainwell 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 March 4, 2025.