Coffeen Stp, City Of
Lagoon Road, Coffeen, IL 62017 · Montgomery County · Publicly Owned Treatment Works
- Average flow
- 0.09 MGD
- Design flow
- 0.86 MGD
- NPDES permit
- ILG580243
- Effective
- Permit expires
- May 2027
- Population served
- 987
- CWNS 2022
Coffeen Stp, City Of is a publicly owned wastewater treatment works in Coffeen, Montgomery County, Illinois treating an average of 0.09 million gallons per day against a permitted design capacity of 0.86 MGD, serving about 987 residents. It discharges under NPDES permit ILG580243 (effective), which expires in May 2027, with 20 recorded violations in the last three years.
Treatment technology
2 treatment structures and unit processes identified at Coffeen Stp, City Of.
Available with a free Klarifi account
See the full treatment train at Coffeen Stp, City Of: structures, unit processes and planned upgrades, with exact unit counts.
Compliance snapshot (last 3 years)
- Total violations
- 20
- Effluent violations
- 15
Based on NPDES Discharge Monitoring Reports. Full violation history, parameters and discharge data available in the Klarifi platform.
Key contacts
2 verified contacts for Coffeen Stp, City Of, with validated emails and direct phone numbers.
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Names, validated emails and direct phone numbers for decision-makers at Coffeen Stp, City Of, plus the full compliance history and discharge data.
Nearby wastewater treatment plants in Illinois
Fillmore · 6 mi away
0.03 MGD
Taylor Springs · 6 mi away
0.09 MGD
Panama · 8 mi away
0.03 MGD
Sorento · 12 mi away
0.05 MGD
Witt · 13 mi away
0.33 MGD
Mulberry Grove · 13 mi away
0.02 MGD
Greenville · 15 mi away
0.9 MGD
Nokomis · 16 mi away
0.21 MGD
Coffeen 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 October 26, 2026; facility record last updated March 9, 2025.
Wastewater terms: POTW · MGD · NPDES permit · Inflow and infiltration · Sludge dewatering · Biological nutrient removal · all terms