Gun Lake WWTP
12588 Marsh Road, Shelbyville, MI 49344 · Allegan County · Publicly Owned Treatment Works
- Average flow
- 0.5 MGD
- Design flow
- —
- NPDES permit
- MI0042501
- Administratively continued
- Permit expires
- October 2025
- Population served
- 7,872
- CWNS 2022
Gun Lake WWTP is a publicly owned wastewater treatment works in Shelbyville, Allegan County, Michigan treating an average of 0.5 million gallons per day, serving about 7,872 residents. It discharges under NPDES permit MI0042501 (administratively continued), which expires in October 2025, with 0 recorded violations in the last three years.
Treatment technology
2 treatment structures and unit processes identified at Gun Lake WWTP.
Available with a free Klarifi account
See the full treatment train at Gun Lake 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 Gun Lake WWTP.
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Nearby wastewater treatment plants in Michigan
Caledonia · 11 mi away
0.04 MGD
Plainwell · 11 mi away
0.34 MGD
Middleville · 11 mi away
0.24 MGD
Hopkins · 12 mi away
1 MGD
Allegan · 17 mi away
0.77 MGD
Kalamazoo · 19 mi away
27.05 MGD
Battle Creek · 21 mi away
7.58 MGD
Nashville · 22 mi away
0.31 MGD
Gun Lake 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 August 18, 2026.
Wastewater terms: POTW · MGD · NPDES permit · Inflow and infiltration · Anaerobic digester · Lift station · all terms