Fcpwsd No 1 Cobblestone Creek WWTP
Greystone Drive, Washington, MO 63090 · Franklin County · Publicly Owned Treatment Works
- Average flow
- 0.02 MGD
- Design flow
- —
- NPDES permit
- MO0125539
- Administratively continued
- 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 0.02 million gallons per day, serving about 222 residents. It discharges under NPDES permit MO0125539 (administratively continued), which expires in June 2026, with 4 recorded violations in the last three years.
Treatment technology
4 treatment structures and unit processes identified at Fcpwsd No 1 Cobblestone Creek WWTP.
Available with a free Klarifi account
See the full treatment train at Fcpwsd No 1 Cobblestone Creek WWTP: structures, unit processes and planned upgrades, with 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 October 26, 2026; facility record last updated February 6, 2025.
Wastewater terms: POTW · MGD · NPDES permit · Inflow and infiltration · FOG · Equalization tank · all terms