Spencerville WWTP
1225 S St Marys Rd, Spencerville, OH 45887 · Allen County · Publicly Owned Treatment Works
- Average flow
- 0.29 MGD
- Design flow
- 0.45 MGD
- NPDES permit
- OH0020087
- Administratively continued
- Permit expires
- August 2025
- Population served
- 2,284
- CWNS 2022
Spencerville WWTP is a publicly owned wastewater treatment works in Spencerville, Allen County, Ohio treating an average of 0.29 million gallons per day against a permitted design capacity of 0.45 MGD, serving about 2,284 residents. It discharges under NPDES permit OH0020087 (administratively continued), which expires in August 2025, with 11 recorded violations in the last three years.
Treatment technology
3 treatment structures and unit processes identified at Spencerville WWTP.
Available with a free Klarifi account
See the full treatment train at Spencerville WWTP: structures, unit processes and planned upgrades, with exact unit counts.
Compliance snapshot (last 3 years)
- Total violations
- 11
- Effluent violations
- 11
Based on NPDES Discharge Monitoring Reports. Full violation history, parameters and discharge data available in the Klarifi platform.
Key contacts
Decision-makers at Spencerville WWTP.
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Middle Point · 10 mi away
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Spencerville 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 19, 2026.
Wastewater terms: POTW · MGD · NPDES permit · Inflow and infiltration · Ozonation · Activated sludge · all terms