What is the address of Lockport Stw?

The address on the plant’s EPA facility record is 425 West Division Street, Lockport, IL 60441, in Will County. Its coordinates are 41.5811, -88.0668. For some plants the record holds the utility’s mailing address rather than the plant gate.

What treatment technology does Lockport Stw use?

Klarifi has identified 7 treatment structures and unit processes at the Lockport facility. The full treatment train, with exact unit counts, is shown in Klarifi with a free account.

What is the NPDES permit for Lockport Stw?

The facility discharges under NPDES permit ILL029611, currently effective, expiring December 2030.

Is Lockport Stw in compliance?

Discharge monitoring reports show no violations at Lockport Stw in the last three years.

Who operates Lockport Stw and how do I contact them?

Lockport Stw is a publicly owned treatment works in Lockport, Illinois. Klarifi lists 3 verified decision-maker contacts for this facility, available with a free trial.

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Lockport Stw

425 West Division Street, Lockport, IL 60441 · 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. It discharges under NPDES permit ILL029611 (effective), which expires in December 2030, with 0 recorded violations in the last three years.

Treatment technology

7 treatment structures and unit processes identified, 1 planned upgrade on record at Lockport Stw.

Available with a free Klarifi account

See the full treatment train at Lockport Stw: structures, unit processes and planned upgrades, with exact unit counts.

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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.

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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 October 26, 2026; facility record last updated March 5, 2025.

Wastewater terms: POTW · MGD · NPDES permit · Inflow and infiltration · Sludge dewatering · Biological nutrient removal · all terms

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