Vienna Stp, City Of
Vienna, IL · Johnson County · Publicly Owned Treatment Works
- Average flow
- 0.25 MGD
- Design flow
- 1 MGD
- NPDES permit
- IL0031593
- Effective
- Permit expires
- October 2029
- Population served
- —
- CWNS 2022
Vienna Stp, City Of is a publicly owned wastewater treatment works in Vienna, Johnson County, Illinois treating an average of 0.25 million gallons per day against a permitted design capacity of 1 MGD. It discharges under NPDES permit IL0031593 (effective), which expires in October 2029, with 1 recorded violation in the last three years.
Treatment technology
Treatment structures identified at this facility. Exact unit counts are available in Klarifi.
Treatment structure data not yet analyzed for this facility.
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 Vienna Stp, City Of.
No verified contacts on file yet
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Nearby wastewater treatment plants in Illinois
Buncombe · 6 mi away
0.0043 MGD
Cypress · 8 mi away
—
Karnak · 9 mi away
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Goreville · 11 mi away
0.04 MGD
New Grand Chain · 13 mi away
—
Creal Springs · 15 mi away
—
Joppa · 15 mi away
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Dongola · 15 mi away
0.08 MGD
Vienna Stp, City 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 September 11, 2026; facility record last updated May 18, 2025.