Tiffin WWTP
Tiffin, OH · Seneca County · Publicly Owned Treatment Works
- Average flow
- 1.97 MGD
- Design flow
- 4 MGD
- NPDES permit
- OH0052949
- Administratively continued
- Permit expires
- April 2026
- Population served
- 18,012
- CWNS 2022
Tiffin WWTP is a publicly owned wastewater treatment works in Tiffin, Seneca County, Ohio treating an average of 1.97 million gallons per day against a permitted design capacity of 4 MGD, serving about 18,012 residents. Treatment on site includes clarifiers, uncovered lagoons, biogas silos. It discharges under NPDES permit OH0052949 (administratively continued), which expires in April 2026, with 4 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
- 4
- Effluent violations
- 3
Based on NPDES Discharge Monitoring Reports. Full violation history, parameters and discharge data available in the Klarifi platform.
Key contacts
2 verified contacts for Tiffin WWTP, with validated emails and direct phone numbers.
Unlock 2 verified contacts
Names, validated emails and direct phone numbers for decision-makers at Tiffin WWTP, plus the full compliance history and discharge data.
Nearby wastewater treatment plants in Ohio
Tiffin · 1 mi away
0.0079 MGD
Tiffin · 4 mi away
0.01 MGD
Republic · 7 mi away
—
Bettsville · 9 mi away
0.04 MGD
Bloomville · 9 mi away
0.03 MGD
Fostoria · 13 mi away
0.05 MGD
Sycamore · 13 mi away
0.02 MGD
Fremont · 13 mi away
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Tiffin 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 20, 2025.