How much wastewater does Marshall Stp, City Of treat?

Marshall Stp, City Of treats an average of 0.21 MGD and is permitted for a design flow of 1.35 MGD.

What is the NPDES permit for Marshall Stp, City Of?

The facility discharges under NPDES permit IL0068365, currently effective, expiring October 2030.

Is Marshall Stp, City Of in compliance?

Discharge monitoring reports show 135 violations at Marshall Stp, City Of in the last three years, 3 of them effluent limit exceedances. The full history is available in Klarifi.

Who operates Marshall Stp, City Of and how do I contact them?

Marshall Stp, City Of is a publicly owned treatment works in Marshall, Illinois. Klarifi lists 1 verified decision-maker contact for this facility, available with a free trial.

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Marshall Stp, City Of

Marshall, IL · Clark County · Publicly Owned Treatment Works

Average flow: 0.21 MGD

Design flow: 1.35 MGD

NPDES permit: IL0068365; Effective

Permit expires: October 2030

Population served: 3,857; CWNS 2022

Marshall Stp, City Of is a publicly owned wastewater treatment works in Marshall, Clark County, Illinois treating an average of 0.21 million gallons per day against a permitted design capacity of 1.35 MGD, serving about 3,857 residents. It discharges under NPDES permit IL0068365 (effective), which expires in October 2030, with 135 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: 135

Effluent violations: 3

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

Key contacts

1 verified contact for Marshall Stp, City Of, with validated emails and direct phone numbers.

Unlock 1 verified contact

Names, validated emails and direct phone numbers for decision-makers at Marshall Stp, City Of, plus the full compliance history and discharge data.

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Marshall 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 September 11, 2026; facility record last updated May 17, 2025.

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