West Liberty - Dundas STP
East Cherry St, Dundas, IL 62425 · Richland County · Publicly Owned Treatment Works
- Average flow
- 0.15 MGD
- Design flow
- 0.06 MGD
- NPDES permit
- IL0077879
- Effective
- Permit expires
- September 2028
- Population served
- 562
- CWNS 2022
West Liberty - Dundas STP is a publicly owned wastewater treatment works in Dundas, Richland County, Illinois treating an average of 0.15 million gallons per day against a permitted design capacity of 0.06 MGD, serving about 562 residents. It discharges under NPDES permit IL0077879 (effective), which expires in September 2028, with 19 recorded violations in the last three years.
Treatment technology
Treatment structures and unit processes at West Liberty - Dundas STP.
Treatment structure data not yet analyzed for this facility.
Compliance snapshot (last 3 years)
- Total violations
- 19
- Effluent violations
- 19
Based on NPDES Discharge Monitoring Reports. Full violation history, parameters and discharge data available in the Klarifi platform.
Key contacts
Decision-makers at West Liberty - Dundas STP.
No verified contacts on file yet
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Nearby wastewater treatment plants in Illinois
Sainte Marie · 7 mi away
0.05 MGD
Olney · 8 mi away
1.34 MGD
Claremont · 10 mi away
0.0057 MGD
Willow Hill · 12 mi away
0.02 MGD
Newton · 12 mi away
0.41 MGD
Noble · 12 mi away
0.0034 MGD
Calhoun · 14 mi away
0.02 MGD
Sumner · 14 mi away
0.07 MGD
West Liberty - Dundas STP: 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 19, 2026; facility record last updated September 22, 2025.
Wastewater terms: POTW · MGD · NPDES permit · Inflow and infiltration · WWTP · Biosolids · all terms