How much wastewater does Wayne City South STP treat?

Wayne City South STP treats an average of 0.09 MGD and is permitted for a design flow of 0.48 MGD.

What treatment technology does Wayne City South STP use?

Klarifi has identified aerated lagoons, uncovered lagoons at the Wayne City facility.

What is the NPDES permit for Wayne City South STP?

The facility discharges under NPDES permit ILG580220, currently effective, expiring May 2027.

Is Wayne City South STP in compliance?

Discharge monitoring reports show 7 violations at Wayne City South STP in the last three years, 7 of them effluent limit exceedances. The full history is available in Klarifi.

Who operates Wayne City South STP and how do I contact them?

Wayne City South STP is a publicly owned treatment works in Wayne City, Illinois. Klarifi lists 2 verified decision-maker contacts for this facility, available with a free trial.

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Wayne City South STP

Wayne City, IL · Wayne County · Publicly Owned Treatment Works

Average flow: 0.09 MGD

Design flow: 0.48 MGD

NPDES permit: ILG580220; Effective

Permit expires: May 2027

Population served: 1,455; CWNS 2022

Wayne City South STP is a publicly owned wastewater treatment works in Wayne City, Wayne County, Illinois treating an average of 0.09 million gallons per day against a permitted design capacity of 0.48 MGD, serving about 1,455 residents. Treatment on site includes aerated lagoons, uncovered lagoons. It discharges under NPDES permit ILG580220 (effective), which expires in May 2027, with 7 recorded violations in the last three years.

Treatment technology

Treatment structures identified at this facility. Exact unit counts are available in Klarifi.

Aerated lagoons

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Uncovered lagoons

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Compliance snapshot (last 3 years)

Total violations: 7

Effluent violations: 7

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

Key contacts

2 verified contacts for Wayne City South STP, with validated emails and direct phone numbers.

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Names, validated emails and direct phone numbers for decision-makers at Wayne City South STP, plus the full compliance history and discharge data.

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Wayne City South 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 September 11, 2026; facility record last updated August 19, 2026.

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