Lockport Stw
Lockport, IL · Will County · Publicly Owned Treatment Works
- Average flow
- —
- Design flow
- —
- NPDES permit
- ILL029611
- Effective
- Permit expires
- December 2030
- Population served
- 18,266
- CWNS 2022
Lockport Stw is a publicly owned wastewater treatment plant in Lockport, Will County, Illinois, serving about 18,266 residents. Treatment on site includes clarifiers, biogas silos, biogas balloons, biosolids aerobic digestion, chemical p removal and other unit processes. It discharges under NPDES permit ILL029611 (effective), which expires in December 2030, with 0 recorded violations in the last three years. Planned upgrades on record: biological p removal.
Treatment technology
Treatment structures identified at this facility. Exact unit counts are available in Klarifi.
Clarifiers
Unlock
Biogas silos
Unlock
Biogas balloons
Unlock
Biosolids Aerobic Digestion
unit processChemical P Removal
unit processPrimary Clarification or Sedimentation
unit processScreening
unit processBiological P removal
planned upgradeUnlock 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.
Key contacts
3 verified contacts for Lockport Stw, with validated emails and direct phone numbers.
Unlock 3 verified contacts
Names, validated emails and direct phone numbers for decision-makers at Lockport Stw, plus the full compliance history and discharge data.
Nearby wastewater treatment plants in Illinois
Crest Hill · 1 mi away
1.19 MGD
Joliet · 4 mi away
0.11 MGD
Crest Hill · 4 mi away
0.47 MGD
Romeoville · 5 mi away
4.81 MGD
Joliet · 5 mi away
—
New Lenox · 7 mi away
1.46 MGD
Bolingbrook · 7 mi away
2.52 MGD
New Lenox · 7 mi away
0.15 MGD
Lockport Stw: 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 5, 2025.