Potomac STP
Potomac, IL · Vermilion County · Publicly Owned Treatment Works
- Average flow
- —
- Design flow
- 0.41 MGD
- NPDES permit
- ILG580247
- Effective
- Permit expires
- May 2027
- Population served
- 842
- CWNS 2022
Potomac STP is a publicly owned wastewater treatment works in Potomac, Vermilion County, Illinois, serving about 842 residents. Treatment on site includes uncovered lagoons. It discharges under NPDES permit ILG580247 (effective), which expires in May 2027, with 13 recorded violations in the last three years.
Treatment technology
Treatment structures identified at this facility. Exact unit counts are available in Klarifi.
Uncovered lagoons
Unlock
Unlock exact unit counts →
Compliance snapshot (last 3 years)
- Total violations
- 13
- Effluent violations
- 7
Based on NPDES Discharge Monitoring Reports. Full violation history, parameters and discharge data available in the Klarifi platform.
Key contacts
Decision-makers at Potomac STP.
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 Illinois
Rossville · 8 mi away
0.09 MGD
Tilton · 16 mi away
0.22 MGD
Ogden · 17 mi away
0.04 MGD
Catlin · 17 mi away
—
Paxton · 18 mi away
0.37 MGD
Danville · 18 mi away
5 MGD
Cissna Park · 18 mi away
0.07 MGD
Belgium · 19 mi away
0.27 MGD
Potomac 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 September 11, 2026; facility record last updated March 9, 2025.