Hillsdale Stp, Village Of
Hillsdale, IL · Rock Island County · Publicly Owned Treatment Works
- Average flow
- 0.007 MGD
- Design flow
- 0.26 MGD
- NPDES permit
- ILG580009
- Effective
- Permit expires
- May 2027
- Population served
- 772
- CWNS 2022
Hillsdale Stp, Village Of is a publicly owned wastewater treatment works in Hillsdale, Rock Island County, Illinois treating an average of 0.007 million gallons per day against a permitted design capacity of 0.26 MGD, serving about 772 residents. Treatment on site includes clarifiers, biogas silos, biogas balloons. It discharges under NPDES permit ILG580009 (effective), which expires in May 2027, with 23 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
- 23
- Effluent violations
- 23
Based on NPDES Discharge Monitoring Reports. Full violation history, parameters and discharge data available in the Klarifi platform.
Key contacts
1 verified contact for Hillsdale Stp, Village Of, with validated emails and direct phone numbers.
Unlock 1 verified contact
Names, validated emails and direct phone numbers for decision-makers at Hillsdale Stp, Village Of, plus the full compliance history and discharge data.
Nearby wastewater treatment plants in Illinois
Erie · 5 mi away
0.03 MGD
Cordova · 9 mi away
0.02 MGD
Geneseo · 11 mi away
0.36 MGD
Albany · 12 mi away
0.04 MGD
Prophetstown · 13 mi away
0.15 MGD
Colona · 14 mi away
0.26 MGD
Atkinson · 14 mi away
0.11 MGD
East Moline · 15 mi away
3.74 MGD
Hillsdale 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 December 13, 2025.