Joliet West Stp, City Of
4000 Channahon Road, Joliet, IL 60436 · Will County · Publicly Owned Treatment Works
- Average flow
- 8.9 MGD
- Design flow
- —
- NPDES permit
- ILL033553
- Effective
- Permit expires
- December 2030
- Population served
- 75,393
- CWNS 2022
Joliet West Stp, City Of is a publicly owned wastewater treatment works in Joliet, Will County, Illinois treating an average of 8.9 million gallons per day, serving about 75,393 residents. It discharges under NPDES permit ILL033553 (effective), which expires in December 2030, with 0 recorded violations in the last three years. EPA has recorded 2 formal enforcement actions naming the plant, the latest in November 2021.
Treatment technology
3 treatment structures and unit processes identified at Joliet West Stp, City Of.
Available with a free Klarifi account
See the full treatment train at Joliet West Stp, City Of: structures, unit processes and planned upgrades, with exact unit counts.
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.
EPA enforcement history
Federal civil enforcement cases, compliance inspections and informal actions recorded for Joliet West Stp, City Of in EPA's ICIS system.
- Formal actions
- 2
- 0 since FY2020
- Compliance actions
- $15M
- required by EPA orders
- EPA inspections
- 0
- none on record
Latest case · Nov 2021
City of Joliet
Administrative order · CWA, NPDES Permit Violations · Final Order No Penalty · Compliance actions $38,421 · The case also names 1 other plant, and its amounts cover all of them
Source: EPA ECHO, civil enforcement case 05-2018-0326.
Full case history with a free Klarifi account
Every action against Joliet West Stp, City Of with dates, milestones, violation types and EPA's complete case summaries, plus inspections and informal actions.
Key contacts
17 verified contacts for Joliet West Stp, City Of, with validated emails and direct phone numbers.
Unlock 17 verified contacts (14 more than shown)
Names, validated emails and direct phone numbers for decision-makers at Joliet West Stp, City Of, plus the full compliance history and discharge data.
Nearby wastewater treatment plants in Illinois
Joliet · 6 mi away
—
Crest Hill · 7 mi away
0.99 MGD
Joliet · 9 mi away
0.18 MGD
Crest Hill · 9 mi away
1.63 MGD
New Lenox · 10 mi away
1.13 MGD
Manhattan · 10 mi away
1.22 MGD
Wilmington · 10 mi away
0.93 MGD
Lockport · 10 mi away
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Joliet West Stp, City 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 October 26, 2026; facility record last updated March 5, 2025.
Wastewater terms: POTW · MGD · NPDES permit · Inflow and infiltration · Biological nutrient removal · Tertiary treatment · all terms