Merrill Wwsl
North Fenmore Road, Merrill, MI 48637 · Saginaw County · Publicly Owned Treatment Works
- Average flow
- 0.92 MGD
- Design flow
- —
- NPDES permit
- MIG580083
- Administratively continued
- Permit expires
- April 2024
- Population served
- 742
- CWNS 2022
Merrill Wwsl is a publicly owned wastewater treatment plant in Merrill, Saginaw County, Michigan treating an average of 0.92 million gallons per day, serving about 742 residents. It discharges under NPDES permit MIG580083 (administratively continued), which expires in April 2024, with 15 recorded violations in the last three years.
Treatment technology
One treatment structure or unit process identified at Merrill Wwsl.
Available with a free Klarifi account
See the full treatment train at Merrill Wwsl: structures, unit processes and planned upgrades, with exact unit counts.
Compliance snapshot (last 3 years)
- Total violations
- 15
- 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 Merrill Wwsl.
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St. Louis · 13 mi away
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Freeland · 14 mi away
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Ithaca · 15 mi away
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Alma · 16 mi away
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Merrill Wwsl: 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 19, 2026; facility record last updated November 19, 2024.
Wastewater terms: POTW · MGD · NPDES permit · Inflow and infiltration · Anaerobic digester · Lift station · all terms