Madison WWTP No 1
Madison, OH · Lake County · Publicly Owned Treatment Works
- Average flow
- 2.01 MGD
- Design flow
- 5 MGD
- NPDES permit
- OH0036790
- Effective
- Permit expires
- January 2028
- Population served
- 10,180
- CWNS 2022
Madison WWTP No 1 is a publicly owned wastewater treatment works in Madison, Lake County, Ohio treating an average of 2.01 million gallons per day against a permitted design capacity of 5 MGD, serving about 10,180 residents. Treatment on site includes clarifiers. It discharges under NPDES permit OH0036790 (effective), which expires in January 2028, with 54 recorded violations in the last three years.
Treatment technology
Treatment structures identified at this facility. Exact unit counts are available in Klarifi.
Clarifiers
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Compliance snapshot (last 3 years)
- Total violations
- 54
- Effluent violations
- 4
Based on NPDES Discharge Monitoring Reports. Full violation history, parameters and discharge data available in the Klarifi platform.
Key contacts
Decision-makers at Madison WWTP No 1.
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Nearby wastewater treatment plants in Ohio
Geneva On The Lake · 2 mi away
0.14 MGD
Geneva · 4 mi away
0.64 MGD
Madison · 5 mi away
—
Geneva · 5 mi away
0.0081 MGD
Austinburg · 9 mi away
0.09 MGD
Ashtabula · 10 mi away
0.01 MGD
Ashtabula · 12 mi away
2.72 MGD
Jefferson · 14 mi away
0.35 MGD
Madison WWTP No 1: 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 August 19, 2026.