Mast Estates WWTP
Elida, OH · Allen County · Publicly Owned Treatment Works
- Average flow
- 0.0062 MGD
- Design flow
- 0.009 MGD
- NPDES permit
- OH0037389
- Effective
- Permit expires
- April 2027
- Population served
- 82
- CWNS 2022
Mast Estates WWTP is a publicly owned wastewater treatment works in Elida, Allen County, Ohio treating an average of 0.0062 million gallons per day against a permitted design capacity of 0.009 MGD, serving about 82 residents. It discharges under NPDES permit OH0037389 (effective), which expires in April 2027, with 0 recorded violations in the last three years.
Treatment technology
Treatment structures identified at this facility. Exact unit counts are available in Klarifi.
Treatment structure data not yet analyzed for this facility.
Compliance snapshot (last 3 years)
- Total violations
- 0
- 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 Mast Estates WWTP.
No verified contacts on file yet
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Nearby wastewater treatment plants in Ohio
Beaverdam · 2 mi away
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Columbus Grove · 3 mi away
0.19 MGD
Bluffton · 3 mi away
0.44 MGD
Pandora · 7 mi away
0.19 MGD
Lafayette · 7 mi away
0.02 MGD
Ada · 9 mi away
0.49 MGD
Harrod · 10 mi away
0.000025 MGD
Rawson · 10 mi away
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Mast Estates 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 November 15, 2025.