Illinois American Water - Grafton STP
Grafton, IL · Jersey County · Publicly Owned Treatment Works
- Average flow
- 0.05 MGD
- Design flow
- 0.76 MGD
- NPDES permit
- IL0029025
- Administratively continued
- Permit expires
- September 2022
- Population served
- —
- CWNS 2022
Illinois American Water - Grafton STP is a publicly owned wastewater treatment works in Grafton, Jersey County, Illinois treating an average of 0.05 million gallons per day against a permitted design capacity of 0.76 MGD. It discharges under NPDES permit IL0029025 (administratively continued), which expires in September 2022, with 0 recorded violations in the last three years.
Treatment technology
Treatment structures identified at this facility. Exact unit counts are available in Klarifi.
Treatment structure data not yet analyzed for this facility.
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 Illinois American Water - Grafton STP.
No verified contacts on file yet
Klarifi verifies plant and municipal decision-makers continuously. Start a free trial to browse contacts at nearby plants and flag this one for verification.
Nearby wastewater treatment plants in Illinois
Jerseyville · 10 mi away
0.83 MGD
Godfrey · 11 mi away
0.6 MGD
Brighton · 16 mi away
0.26 MGD
Alton · 17 mi away
5.38 MGD
East Alton · 18 mi away
0.51 MGD
Medora · 21 mi away
0.0048 MGD
Carrollton · 22 mi away
0.3 MGD
Roxana · 23 mi away
0.21 MGD
Illinois American Water - Grafton 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 28, 2025.