How much wastewater does Erie STP treat?

Erie STP treats an average of 0.03 MGD and is permitted for a design flow of 0.57 MGD.

What treatment technology does Erie STP use?

Klarifi has identified aerated lagoons at the Erie facility.

What is the NPDES permit for Erie STP?

The facility discharges under NPDES permit IL0020303, currently effective, expiring March 2028.

Is Erie STP in compliance?

Discharge monitoring reports show 36 violations at Erie STP in the last three years, 28 of them effluent limit exceedances. The full history is available in Klarifi.

Who operates Erie STP and how do I contact them?

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

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Erie STP

Erie, IL · Whiteside County · Publicly Owned Treatment Works

Average flow: 0.03 MGD

Design flow: 0.57 MGD

NPDES permit: IL0020303; Effective

Permit expires: March 2028

Population served: 1,892; CWNS 2022

Erie STP is a publicly owned wastewater treatment works in Erie, Whiteside County, Illinois treating an average of 0.03 million gallons per day against a permitted design capacity of 0.57 MGD, serving about 1,892 residents. Treatment on site includes aerated lagoons. It discharges under NPDES permit IL0020303 (effective), which expires in March 2028, with 36 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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Compliance snapshot (last 3 years)

Total violations: 36

Effluent violations: 28

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

Key contacts

1 verified contact for Erie STP, with validated emails and direct phone numbers.

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

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Erie 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 March 9, 2025.

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