Fcpwsd No 1 Cobblestone Creek WWTP
Washington, MO · Franklin County · Publicly Owned Treatment Works
- Average flow
- 0.03 MGD
- Design flow
- —
- NPDES permit
- MO0125539
- Effective
- Permit expires
- June 2026
- Population served
- 222
- CWNS 2022
Fcpwsd No 1 Cobblestone Creek WWTP is a publicly owned wastewater treatment works in Washington, Franklin County, Missouri treating an average of 0.03 million gallons per day, serving about 222 residents. Treatment on site includes biological treatment, other, biosolids aerobic digestion, flow equalization, screening. It discharges under NPDES permit MO0125539 (effective), which expires in June 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.
Biological Treatment, Other
unit processBiosolids Aerobic Digestion
unit processFlow Equalization
unit processScreening
unit processUnlock exact unit counts →
Compliance snapshot (last 3 years)
- Total violations
- 4
- Effluent violations
- 4
Based on NPDES Discharge Monitoring Reports. Full violation history, parameters and discharge data available in the Klarifi platform.
Key contacts
Decision-makers at Fcpwsd No 1 Cobblestone Creek WWTP.
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Fcpwsd No 1 Cobblestone Creek 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 February 6, 2025.