Aledo South Stp, City Of
Aledo, IL · Mercer County · Publicly Owned Treatment Works
- Average flow
- 0.15 MGD
- Design flow
- 3.82 MGD
- NPDES permit
- IL0027316
- Effective
- Permit expires
- June 2028
- Population served
- 1,670
- CWNS 2022
Aledo South Stp, City Of is a publicly owned wastewater treatment works in Aledo, Mercer County, Illinois treating an average of 0.15 million gallons per day against a permitted design capacity of 3.82 MGD, serving about 1,670 residents. Treatment on site includes aerated lagoons, uncovered lagoons. It discharges under NPDES permit IL0027316 (effective), which expires in June 2028, with 0 recorded violations in the last three years.
Treatment technology
Treatment structures identified at this facility. Exact unit counts are available in Klarifi.
Compliance snapshot (last 3 years)
- Total violations
- 0
- 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 Aledo South Stp, City Of.
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Nearby wastewater treatment plants in Illinois
Aledo · 4 mi away
0.08 MGD
Joy · 7 mi away
0.06 MGD
Matherville · 9 mi away
—
Viola · 10 mi away
0.03 MGD
Keithsburg · 11 mi away
0.11 MGD
Reynolds · 12 mi away
—
Alexis · 13 mi away
0.04 MGD
Sherrard · 16 mi away
0.05 MGD
Aledo South 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 September 11, 2026.