Coal City Stp, Village Of
Coal City, IL · Grundy County · Publicly Owned Treatment Works
- Average flow
- 0.79 MGD
- Design flow
- 1.75 MGD
- NPDES permit
- IL0028151
- Effective
- Permit expires
- July 2029
- Population served
- 5,685
- CWNS 2022
Coal City Stp, Village Of is a publicly owned wastewater treatment works in Coal City, Grundy County, Illinois treating an average of 0.79 million gallons per day against a permitted design capacity of 1.75 MGD, serving about 5,685 residents. Treatment on site includes clarifiers, uncovered lagoons. It discharges under NPDES permit IL0028151 (effective), which expires in July 2029, with 11 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
- 11
- Effluent violations
- 11
Based on NPDES Discharge Monitoring Reports. Full violation history, parameters and discharge data available in the Klarifi platform.
Key contacts
4 verified contacts for Coal City Stp, Village Of, with validated emails and direct phone numbers.
Unlock 4 verified contacts (1 more than shown)
Names, validated emails and direct phone numbers for decision-makers at Coal City Stp, Village Of, plus the full compliance history and discharge data.
Nearby wastewater treatment plants in Illinois
Diamond · 1 mi away
0.37 MGD
Braidwood · 3 mi away
0.77 MGD
Gardner · 7 mi away
0.11 MGD
Wilmington · 7 mi away
0.63 MGD
Mazon · 8 mi away
0.05 MGD
Morris · 8 mi away
0.73 MGD
South Wilmington · 8 mi away
0.13 MGD
Essex · 10 mi away
0.03 MGD
Coal City 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 September 11, 2026; facility record last updated March 7, 2025.