What is the address of Warsaw Stw?

The address on the plant’s EPA facility record is Fas 1600 Water Street, Warsaw, IL 62379, in Hancock County. Its coordinates are 40.3443, -91.4509. For some plants the record holds the utility’s mailing address rather than the plant gate.

How much wastewater does Warsaw Stw treat?

Warsaw Stw treats an average of 0.03 MGD and is permitted for a design flow of 0.76 MGD.

What treatment technology does Warsaw Stw use?

Klarifi has identified one treatment structure or unit process at the Warsaw facility. The full treatment train, with exact unit counts, is shown in Klarifi with a free account.

What is the NPDES permit for Warsaw Stw?

The facility discharges under NPDES permit ILG580046, currently effective, expiring May 2027.

Is Warsaw Stw in compliance?

Discharge monitoring reports show 7 violations at Warsaw Stw in the last three years, 6 of them effluent limit exceedances. The full history is available in Klarifi.

Who operates Warsaw Stw and how do I contact them?

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

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Warsaw Stw

Fas 1600 Water Street, Warsaw, IL 62379 · Hancock County · Publicly Owned Treatment Works

Average flow: 0.03 MGD

Design flow: 0.76 MGD

NPDES permit: ILG580046; Effective

Permit expires: May 2027

Population served: 2,191; CWNS 2022

Warsaw Stw is a publicly owned wastewater treatment plant in Warsaw, Hancock County, Illinois treating an average of 0.03 million gallons per day against a permitted design capacity of 0.76 MGD, serving about 2,191 residents. It discharges under NPDES permit ILG580046 (effective), which expires in May 2027, with 7 recorded violations in the last three years.

Treatment technology

One treatment structure or unit process identified at Warsaw Stw.

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See the full treatment train at Warsaw Stw: structures, unit processes and planned upgrades, with exact unit counts.

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Compliance snapshot (last 3 years)

Total violations: 7

Effluent violations: 6

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

Key contacts

2 verified contacts for Warsaw Stw, with validated emails and direct phone numbers.

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

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Nearby wastewater treatment plants in Illinois

City Of Nauvoo Stw

Nauvoo · 14 mi away

0.17 MGD

West Point Stp, Village Of

West Point · 16 mi away

0.02 MGD

Carthage Stp, City Of

Carthage · 18 mi away

0.55 MGD

Loraine Stp, Village Of

Loraine · 18 mi away

—

Mendon, Village Of

Mendon · 20 mi away

0.03 MGD

Bowen - STP

Bowen · 21 mi away

0.05 MGD

Dallas City Stp, City Of

Dallas City · 24 mi away

0.05 MGD

Golden Stp, Village Of

Golden · 27 mi away

0.02 MGD

Warsaw 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 October 26, 2026; facility record last updated November 7, 2025.

Wastewater terms: POTW · MGD · NPDES permit · Inflow and infiltration · FOG · Equalization tank · all terms

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