Norwalk WWTP
Norwalk, OH · Huron County · Publicly Owned Treatment Works
- Average flow
- 1.32 MGD
- Design flow
- 3.5 MGD
- NPDES permit
- OH0052604
- Effective
- Permit expires
- July 2030
- Population served
- 17,015
- CWNS 2022
Norwalk WWTP is a publicly owned wastewater treatment works in Norwalk, Huron County, Ohio treating an average of 1.32 million gallons per day against a permitted design capacity of 3.5 MGD, serving about 17,015 residents. Treatment on site includes clarifiers, biogas silos, biogas balloons. It discharges under NPDES permit OH0052604 (effective), which expires in July 2030, with 28 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
- 28
- Effluent violations
- 14
Based on NPDES Discharge Monitoring Reports. Full violation history, parameters and discharge data available in the Klarifi platform.
Key contacts
13 verified contacts for Norwalk WWTP, with validated emails and direct phone numbers.
Unlock 13 verified contacts (10 more than shown)
Names, validated emails and direct phone numbers for decision-makers at Norwalk WWTP, plus the full compliance history and discharge data.
Nearby wastewater treatment plants in Ohio
Norwalk · 1 mi away
0.0024 MGD
Milan · 3 mi away
0.09 MGD
Milan · 3 mi away
0.002 MGD
Norwalk · 3 mi away
0.000053 MGD
Monroeville · 4 mi away
0.09 MGD
Huron · 6 mi away
0.0015 MGD
Norwalk · 6 mi away
0.00041 MGD
Collins · 9 mi away
0.0068 MGD
Norwalk 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 6, 2025.