How much wastewater does Eureka WTP treat?

Eureka WTP treats an average of 0.39 MGD and is permitted for a design flow of 1.84 MGD.

What treatment technology does Eureka WTP use?

Klarifi has identified uncovered lagoons at the Eureka facility.

What is the NPDES permit for Eureka WTP?

The facility discharges under NPDES permit IL0025119, currently effective, expiring July 2027.

Is Eureka WTP in compliance?

Discharge monitoring reports show 41 violations at Eureka WTP in the last three years, 41 of them effluent limit exceedances. The full history is available in Klarifi.

Who operates Eureka WTP and how do I contact them?

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

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Eureka WTP

Eureka, IL · Woodford County · Publicly Owned Treatment Works

Average flow: 0.39 MGD

Design flow: 1.84 MGD

NPDES permit: IL0025119; Effective

Permit expires: July 2027

Population served: 3,117; CWNS 2022

Eureka WTP is a publicly owned wastewater treatment plant in Eureka, Woodford County, Illinois treating an average of 0.39 million gallons per day against a permitted design capacity of 1.84 MGD, serving about 3,117 residents. Treatment on site includes uncovered lagoons. It discharges under NPDES permit IL0025119 (effective), which expires in July 2027, with 41 recorded violations in the last three years.

Treatment technology

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

Uncovered lagoons

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Compliance snapshot (last 3 years)

Total violations: 41

Effluent violations: 41

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

Key contacts

1 verified contact for Eureka WTP, with validated emails and direct phone numbers.

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Names, validated emails and direct phone numbers for decision-makers at Eureka WTP, plus the full compliance history and discharge data.

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Eureka WTP: 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 November 8, 2025.

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