Dcsd Wastewater Treatment Plant 2
13 Research Park Dr., Weldon Spring, MO 63304 · St Charles County · Publicly Owned Treatment Works
- Average flow
- 4.93 MGD
- Design flow
- —
- NPDES permit
- MO0116572
- Administratively continued
- Permit expires
- December 2025
- Population served
- 5,536
- CWNS 2022
Dcsd Wastewater Treatment Plant 2 is a publicly owned wastewater treatment works in Weldon Spring, St Charles County, Missouri treating an average of 4.93 million gallons per day, serving about 5,536 residents. It discharges under NPDES permit MO0116572 (administratively continued), which expires in December 2025, with 0 recorded violations in the last three years.
Treatment technology
7 treatment structures and unit processes identified at Dcsd Wastewater Treatment Plant 2.
Available with a free Klarifi account
See the full treatment train at Dcsd Wastewater Treatment Plant 2: structures, unit processes and planned upgrades, with exact unit counts.
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 Dcsd Wastewater Treatment Plant 2.
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Nearby wastewater treatment plants in Missouri
St. Charles · 2 mi away
0.0087 MGD
Saint Charles · 8 mi away
4.45 MGD
Saint Peters · 9 mi away
5.65 MGD
Wentzville · 9 mi away
0.74 MGD
Saint Albans · 10 mi away
0.08 MGD
Augusta · 10 mi away
0.01 MGD
New Melle · 10 mi away
0.0033 MGD
O'Fallon · 11 mi away
7.55 MGD
Dcsd Wastewater Treatment Plant 2: 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 September 14, 2026.
Wastewater terms: POTW · MGD · NPDES permit · Inflow and infiltration · Ozonation · Activated sludge · all terms