Clay STP
Clay, KY · Webster County · Publicly Owned Treatment Works
- Average flow
- 0.35 MGD
- Design flow
- 0.2 MGD
- NPDES permit
- KY0028096
- Effective
- Permit expires
- November 2029
- Population served
- 1,630
- CWNS 2022
Clay STP is a publicly owned wastewater treatment works in Clay, Webster County, Kentucky treating an average of 0.35 million gallons per day against a permitted design capacity of 0.2 MGD, serving about 1,630 residents. Treatment on site includes aerated lagoons. It discharges under NPDES permit KY0028096 (effective), which expires in November 2029, with 77 recorded violations in the last three years.
Treatment technology
Treatment structures identified at this facility. Exact unit counts are available in Klarifi.
Aerated lagoons
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Compliance snapshot (last 3 years)
- Total violations
- 77
- Effluent violations
- 77
Based on NPDES Discharge Monitoring Reports. Full violation history, parameters and discharge data available in the Klarifi platform.
Key contacts
Decision-makers at Clay STP.
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Nearby wastewater treatment plants in Kentucky
Sturgis · 10 mi away
0.14 MGD
Morganfield · 14 mi away
0.54 MGD
Marion · 16 mi away
0.32 MGD
Robards · 20 mi away
2.89 MGD
Uniontown · 21 mi away
0.15 MGD
Dawson Springs · 22 mi away
0.21 MGD
Nortonville · 28 mi away
0.16 MGD
Salem · 29 mi away
0.05 MGD
Clay STP: 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 January 25, 2025.