Mount Sterling SE Stp, City Of
Mount Sterling, IL · Brown County · Publicly Owned Treatment Works
- Average flow
- 0.35 MGD
- Design flow
- 0.54 MGD
- NPDES permit
- ILG580089
- Effective
- Permit expires
- May 2027
- Population served
- —
- CWNS 2022
Mount Sterling SE Stp, City Of is a publicly owned wastewater treatment works in Mount Sterling, Brown County, Illinois treating an average of 0.35 million gallons per day against a permitted design capacity of 0.54 MGD. Treatment on site includes aerated lagoons. It discharges under NPDES permit ILG580089 (effective), which expires in May 2027, with 19 recorded violations in the last three years.
Treatment technology
Treatment structures identified at this facility. Exact unit counts are available in Klarifi.
Aerated lagoons
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Compliance snapshot (last 3 years)
- Total violations
- 19
- 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 Mount Sterling SE Stp, City Of.
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Nearby wastewater treatment plants in Illinois
Mount Sterling · 2 mi away
0.26 MGD
Versailles · 8 mi away
0.03 MGD
Clayton · 11 mi away
0.02 MGD
Perry · 12 mi away
0.01 MGD
Rushville · 15 mi away
0.31 MGD
Camp Point · 17 mi away
0.03 MGD
Golden · 18 mi away
0.02 MGD
Griggsville · 18 mi away
0.03 MGD
Mount Sterling SE 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 March 7, 2025.