Downers Grove Sanitary District
5003 Walnut Avenue, Downers Grove, IL 60515 · Du Page County · Publicly Owned Treatment Works
- Average flow
- 10.66 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 10.66 million gallons per day, serving about 48,727 residents. It discharges under NPDES permit ILL028380 (effective), which expires in December 2030, with 6 recorded violations in the last three years.
Treatment technology
2 treatment structures and unit processes identified at Downers Grove Sanitary District.
Available with a free Klarifi account
See the full treatment train at Downers Grove Sanitary District: structures, unit processes and planned upgrades, with exact unit counts.
Compliance snapshot (last 3 years)
- Total violations
- 6
- Effluent violations
- 6
Based on NPDES Discharge Monitoring Reports. Full violation history, parameters and discharge data available in the Klarifi platform.
EPA enforcement history
Federal civil enforcement cases, compliance inspections and informal actions recorded for Downers Grove Sanitary District in EPA's ICIS system.
- Formal actions
- 0
- none on record
- EPA inspections
- 1
- latest Sep 2004
No formal federal enforcement case is on record for this plant.
Full case history with a free Klarifi account
Every action against Downers Grove Sanitary District with dates, milestones, violation types and EPA's complete case summaries, plus inspections and informal actions.
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
11.79 MGD
Woodridge · 4 mi away
8.92 MGD
Bolingbrook · 6 mi away
1.57 MGD
Wheaton · 6 mi away
7.27 MGD
Elmhurst · 8 mi away
10.25 MGD
Burr Ridge · 8 mi away
11.38 MGD
Lemont · 9 mi away
2.85 MGD
Naperville · 9 mi away
20.15 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 October 26, 2026; facility record last updated March 2, 2025.
Wastewater terms: POTW · MGD · NPDES permit · Inflow and infiltration · Filter press · FOG · all terms