Carrollton Stp, City Of
Carrollton, IL · Greene County · Publicly Owned Treatment Works
- Average flow
- 0.3 MGD
- Design flow
- 0.96 MGD
- NPDES permit
- IL0021679
- Effective
- Permit expires
- September 2027
- Population served
- 3,051
- CWNS 2022
Carrollton Stp, City Of is a publicly owned wastewater treatment works in Carrollton, Greene County, Illinois treating an average of 0.3 million gallons per day against a permitted design capacity of 0.96 MGD, serving about 3,051 residents. Treatment on site includes uncovered lagoons. It discharges under NPDES permit IL0021679 (effective), which expires in September 2027, with 0 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
- 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 Carrollton Stp, City Of.
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Nearby wastewater treatment plants in Illinois
White Hall · 9 mi away
0.2 MGD
Kampsville · 11 mi away
0.03 MGD
Greenfield · 12 mi away
0.00006 MGD
Roodhouse · 13 mi away
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Jerseyville · 13 mi away
0.83 MGD
Medora · 16 mi away
0.0048 MGD
Chesterfield · 18 mi away
0.03 MGD
Hettick · 21 mi away
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Carrollton 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 15, 2025.