Warrensburg STP
Warrensburg, IL · Macon County · Publicly Owned Treatment Works
- Average flow
- 0.03 MGD
- Design flow
- 0.63 MGD
- NPDES permit
- IL0034215
- Administratively continued
- Permit expires
- June 2026
- Population served
- 1,555
- CWNS 2022
Warrensburg STP is a publicly owned wastewater treatment works in Warrensburg, Macon County, Illinois treating an average of 0.03 million gallons per day against a permitted design capacity of 0.63 MGD, serving about 1,555 residents. Treatment on site includes uncovered lagoons. It discharges under NPDES permit IL0034215 (administratively continued), which expires in June 2026, with 37 recorded violations in the last three years.
Treatment technology
Treatment structures identified at this facility. Exact unit counts are available in Klarifi.
Uncovered lagoons
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Compliance snapshot (last 3 years)
- Total violations
- 37
- Effluent violations
- 15
Based on NPDES Discharge Monitoring Reports. Full violation history, parameters and discharge data available in the Klarifi platform.
Key contacts
1 verified contact for Warrensburg STP, with validated emails and direct phone numbers.
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Names, validated emails and direct phone numbers for decision-makers at Warrensburg STP, plus the full compliance history and discharge data.
Nearby wastewater treatment plants in Illinois
Niantic · 7 mi away
0.03 MGD
Harristown · 7 mi away
0.04 MGD
Decatur · 8 mi away
26.53 MGD
Maroa · 10 mi away
0.06 MGD
Illiopolis · 10 mi away
0.07 MGD
Mount Pulaski · 13 mi away
0.09 MGD
Macon · 16 mi away
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Blue Mound · 16 mi away
0.03 MGD
Warrensburg 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 November 6, 2025.