Oak Highlands-Ingalls Park Sd STP
Joliet, IL · Will County · Publicly Owned Treatment Works
- Average flow
- 0.11 MGD
- Design flow
- 0.5 MGD
- NPDES permit
- IL0024422
- Effective
- Permit expires
- May 2027
- Population served
- 2,463
- CWNS 2022
Oak Highlands-Ingalls Park Sd STP is a publicly owned wastewater treatment works in Joliet, Will County, Illinois treating an average of 0.11 million gallons per day against a permitted design capacity of 0.5 MGD, serving about 2,463 residents. It discharges under NPDES permit IL0024422 (effective), which expires in May 2027, 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 Oak Highlands-Ingalls Park Sd STP.
No verified contacts on file yet
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Nearby wastewater treatment plants in Illinois
Joliet · 3 mi away
—
Crest Hill · 4 mi away
1.19 MGD
New Lenox · 4 mi away
1.46 MGD
New Lenox · 4 mi away
0.84 MGD
Lockport · 4 mi away
—
New Lenox · 4 mi away
0.15 MGD
Crest Hill · 6 mi away
0.47 MGD
Manhattan · 7 mi away
0.81 MGD
Oak Highlands-Ingalls Park Sd 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.