How much wastewater does City Of Nauvoo Stw treat?

City Of Nauvoo Stw treats an average of 0.13 MGD and is permitted for a design flow of 0.85 MGD.

What treatment technology does City Of Nauvoo Stw use?

Klarifi has identified clarifiers, carrousels / oxidation ditches at the Nauvoo facility.

What is the NPDES permit for City Of Nauvoo Stw?

The facility discharges under NPDES permit IL0023531, currently effective, expiring November 2029.

Is City Of Nauvoo Stw in compliance?

Discharge monitoring reports show no violations at City Of Nauvoo Stw in the last three years.

Who operates City Of Nauvoo Stw and how do I contact them?

City Of Nauvoo Stw is a publicly owned treatment works in Nauvoo, Illinois. Klarifi lists decision-maker contacts for this facility, available with a free trial.

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City Of Nauvoo Stw

Nauvoo, IL · Hancock County · Publicly Owned Treatment Works

Average flow: 0.13 MGD

Design flow: 0.85 MGD

NPDES permit: IL0023531; Effective

Permit expires: November 2029

Population served: 1,052; CWNS 2022

City Of Nauvoo Stw is a publicly owned wastewater treatment plant in Nauvoo, Hancock County, Illinois treating an average of 0.13 million gallons per day against a permitted design capacity of 0.85 MGD, serving about 1,052 residents. Treatment on site includes clarifiers, carrousels / oxidation ditches. It discharges under NPDES permit IL0023531 (effective), which expires in November 2029, with 0 recorded violations in the last three years.

Treatment technology

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

Clarifiers

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Carrousels / oxidation ditches

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Compliance snapshot (last 3 years)

Total violations: 0

Effluent violations: 0

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

Key contacts

Decision-makers at City Of Nauvoo Stw.

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City Of Nauvoo Stw: 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 18, 2025.

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