Carthage Stp, City Of
1441 North State Highway 94, Carthage, IL 62321 · Hancock County · Publicly Owned Treatment Works
- Average flow
- 0.55 MGD
- Design flow
- 5 MGD
- NPDES permit
- IL0021229
- Effective
- Permit expires
- May 2027
- Population served
- 4,426
- CWNS 2022
Carthage Stp, City Of is a publicly owned wastewater treatment works in Carthage, Hancock County, Illinois treating an average of 0.55 million gallons per day against a permitted design capacity of 5 MGD, serving about 4,426 residents. It discharges under NPDES permit IL0021229 (effective), which expires in May 2027, with 43 recorded violations in the last three years.
Treatment technology
2 treatment structures and unit processes identified at Carthage Stp, City Of.
Available with a free Klarifi account
See the full treatment train at Carthage Stp, City Of: structures, unit processes and planned upgrades, with exact unit counts.
Compliance snapshot (last 3 years)
- Total violations
- 43
- Effluent violations
- 43
Based on NPDES Discharge Monitoring Reports. Full violation history, parameters and discharge data available in the Klarifi platform.
Key contacts
Decision-makers at Carthage Stp, City Of.
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Nearby wastewater treatment plants in Illinois
West Point · 10 mi away
0.02 MGD
Plymouth · 12 mi away
0.1 MGD
Bowen · 12 mi away
0.05 MGD
Laharpe · 15 mi away
0.24 MGD
Augusta · 15 mi away
0.04 MGD
Tennessee · 15 mi away
0.003 MGD
Dallas City · 16 mi away
0.05 MGD
Blandinsville · 17 mi away
0.03 MGD
Carthage 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 November 7, 2025.
Wastewater terms: POTW · MGD · NPDES permit · Inflow and infiltration · Anaerobic digester · Lift station · all terms