Washington WWTP
2000 Simonds Avenue, Washington, MO 63090 · Franklin County · Publicly Owned Treatment Works
- Average flow
- 2.48 MGD
- Design flow
- —
- NPDES permit
- MO0025810
- Administratively continued
- Permit expires
- March 2026
- Population served
- 4,684
- CWNS 2022
Washington WWTP is a publicly owned wastewater treatment works in Washington, Franklin County, Missouri treating an average of 2.48 million gallons per day, serving about 4,684 residents. It discharges under NPDES permit MO0025810 (administratively continued), which expires in March 2026, with 2 recorded violations in the last three years.
Treatment technology
6 treatment structures and unit processes identified at Washington WWTP.
Available with a free Klarifi account
See the full treatment train at Washington WWTP: structures, unit processes and planned upgrades, with exact unit counts.
Compliance snapshot (last 3 years)
- Total violations
- 2
- Effluent violations
- 2
Based on NPDES Discharge Monitoring Reports. Full violation history, parameters and discharge data available in the Klarifi platform.
Key contacts
Decision-makers at Washington WWTP.
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Nearby wastewater treatment plants in Missouri
Washington · 2 mi away
0.01 MGD
Washington · 4 mi away
0.02 MGD
Washington · 5 mi away
0.0093 MGD
Washington · 5 mi away
0.14 MGD
Augusta · 6 mi away
0.03 MGD
Villa Ridge · 6 mi away
0.03 MGD
Villa Ridge · 6 mi away
0.002 MGD
Villa Ridge · 7 mi away
0.0013 MGD
Washington 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 12, 2026; facility record last updated May 20, 2025.
Wastewater terms: POTW · MGD · NPDES permit · Inflow and infiltration · Activated sludge · Oxidation ditch · all terms