Downers Grove Sanitary District
Downers Grove, IL · Du Page County · Publicly Owned Treatment Works
- Average flow
- 6.39 MGD
- Design flow
- —
- NPDES permit
- ILL028380
- Effective
- Permit expires
- December 2030
- Population served
- 48,727
- CWNS 2022
Downers Grove Sanitary District is a publicly owned wastewater treatment plant in Downers Grove, Du Page County, Illinois treating an average of 6.39 million gallons per day, serving about 48,727 residents. Treatment on site includes clarifiers, biogas silos. It discharges under NPDES permit ILL028380 (effective), which expires in December 2030, with 5 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
- 5
- Effluent violations
- 5
Based on NPDES Discharge Monitoring Reports. Full violation history, parameters and discharge data available in the Klarifi platform.
Key contacts
5 verified contacts for Downers Grove Sanitary District, with validated emails and direct phone numbers.
Unlock 5 verified contacts (2 more than shown)
Names, validated emails and direct phone numbers for decision-makers at Downers Grove Sanitary District, plus the full compliance history and discharge data.
Nearby wastewater treatment plants in Illinois
Glen Ellyn · 3 mi away
7.04 MGD
Woodridge · 4 mi away
6.1 MGD
Bolingbrook · 6 mi away
1.03 MGD
Wheaton · 6 mi away
4.5 MGD
Elmhurst · 8 mi away
7.92 MGD
Burr Ridge · 8 mi away
8.31 MGD
Lemont · 9 mi away
2 MGD
Naperville · 9 mi away
17.26 MGD
Downers Grove Sanitary District: 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 2, 2025.