Dcsd Wastewater Treatment Plant 2
Weldon Spring, MO · St Charles County · Publicly Owned Treatment Works
- Average flow
- 4.28 MGD
- Design flow
- —
- NPDES permit
- MO0116572
- Effective
- 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 4.28 million gallons per day, serving about 5,536 residents. Treatment on site includes clarifiers, uncovered lagoons, carrousels / oxidation ditches, biological treatment, other, biosolids aerobic digestion and other unit processes. It discharges under NPDES permit MO0116572 (effective), which expires in December 2025, with 0 recorded violations in the last three years.
Treatment technology
Treatment structures identified at this facility. Exact unit counts are available in Klarifi.
Clarifiers
Unlock
Uncovered lagoons
Unlock
Carrousels / oxidation ditches
Unlock
Biological Treatment, Other
unit processBiosolids Aerobic Digestion
unit processBiosolids Mechanical Dewatering
unit processDisinfection, UV
unit processScreening
unit processUnlock 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.
No verified contacts on file yet
Klarifi verifies plant and municipal decision-makers continuously. Start a free trial to browse contacts at nearby plants and flag this one for verification.
Nearby wastewater treatment plants in Missouri
St. Charles · 2 mi away
0.0094 MGD
Saint Charles · 8 mi away
4.04 MGD
Saint Peters · 9 mi away
4.83 MGD
Wentzville · 9 mi away
0.51 MGD
Saint Albans · 10 mi away
0.06 MGD
Augusta · 10 mi away
0.0086 MGD
New Melle · 10 mi away
0.0039 MGD
O'Fallon · 11 mi away
6.7 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 September 11, 2026; facility record last updated May 20, 2025.