What is the address of Chatsworth STP?

The address on the plant’s EPA facility record is 315 East Maple Street, Chatsworth, IL 60921, in Livingston County. Its coordinates are 40.7597, -88.2793. For some plants the record holds the utility’s mailing address rather than the plant gate.

How much wastewater does Chatsworth STP treat?

Chatsworth STP treats an average of 0.1 MGD and is permitted for a design flow of 0.46 MGD.

What treatment technology does Chatsworth STP use?

Klarifi has identified 2 treatment structures and unit processes at the Chatsworth facility. The full treatment train, with exact unit counts, is shown in Klarifi with a free account.

What is the NPDES permit for Chatsworth STP?

The facility discharges under NPDES permit ILG580091, currently effective, expiring May 2027.

Is Chatsworth STP in compliance?

Discharge monitoring reports show 16 violations at Chatsworth STP in the last three years, 16 of them effluent limit exceedances. The full history is available in Klarifi.

Who operates Chatsworth STP and how do I contact them?

Chatsworth STP is a publicly owned treatment works in Chatsworth, Illinois. Klarifi lists decision-maker contacts for this facility, available with a free trial.

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Chatsworth STP

315 East Maple Street, Chatsworth, IL 60921 · Livingston County · Publicly Owned Treatment Works

Average flow: 0.1 MGD

Design flow: 0.46 MGD

NPDES permit: ILG580091; Effective

Permit expires: May 2027

Population served: 1,256; CWNS 2022

Chatsworth STP is a publicly owned wastewater treatment works in Chatsworth, Livingston County, Illinois treating an average of 0.1 million gallons per day against a permitted design capacity of 0.46 MGD, serving about 1,256 residents. It discharges under NPDES permit ILG580091 (effective), which expires in May 2027, with 16 recorded violations in the last three years.

Treatment technology

2 treatment structures and unit processes identified at Chatsworth STP.

Available with a free Klarifi account

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

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Compliance snapshot (last 3 years)

Total violations: 16

Effluent violations: 16

Based on NPDES Discharge Monitoring Reports. Full violation history, parameters and discharge data available in the Klarifi platform.

Key contacts

Decision-makers at Chatsworth STP.

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Nearby wastewater treatment plants in Illinois

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Fairbury Stw, City Of

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Onarga Stp, Village Of

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Gilman North Stp, City Of

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Odell Stp, Village Of

Odell · 20 mi away

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Chenoa Stp, City Of

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Clifton Wwtp, Village Of

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Colfax Stp, Village Of

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Chatsworth 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 October 26, 2026; facility record last updated June 17, 2026.

Wastewater terms: POTW · MGD · NPDES permit · Inflow and infiltration · Activated sludge · Oxidation ditch · all terms

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