Viola Stp, Village Of
Viola, IL 61486 · Mercer County · Publicly Owned Treatment Works
- Average flow
- 0.09 MGD
- Design flow
- 0.28 MGD
- NPDES permit
- ILG580233
- Effective
- Permit expires
- May 2027
- Population served
- 1,062
- CWNS 2022
Viola Stp, Village Of is a publicly owned wastewater treatment works in Viola, Mercer County, Illinois treating an average of 0.09 million gallons per day against a permitted design capacity of 0.28 MGD, serving about 1,062 residents. It discharges under NPDES permit ILG580233 (effective), which expires in May 2027, with 1 recorded violation in the last three years.
Treatment technology
2 treatment structures and unit processes identified at Viola Stp, Village Of.
Available with a free Klarifi account
See the full treatment train at Viola Stp, Village Of: structures, unit processes and planned upgrades, with exact unit counts.
Compliance snapshot (last 3 years)
- Total violations
- 1
- Effluent violations
- 1
Based on NPDES Discharge Monitoring Reports. Full violation history, parameters and discharge data available in the Klarifi platform.
Key contacts
Decision-makers at Viola Stp, Village Of.
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Nearby wastewater treatment plants in Illinois
Matherville · 3 mi away
0.05 MGD
New Windsor · 7 mi away
0.02 MGD
Sherrard · 8 mi away
0.15 MGD
Aledo · 9 mi away
0.32 MGD
Reynolds · 10 mi away
0.14 MGD
Alpha · 10 mi away
0.21 MGD
Aledo · 10 mi away
0.3 MGD
Alexis · 11 mi away
0.23 MGD
Viola Stp, Village Of: 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 26, 2026; facility record last updated November 6, 2025.
Wastewater terms: POTW · MGD · NPDES permit · Inflow and infiltration · Biological nutrient removal · Tertiary treatment · all terms