What is the address of Jacksonville STP?

The address on the plant’s EPA facility record is Rural Route 3, Jacksonville, IL 62650, in Morgan County. Its coordinates are 39.7511, -90.2311. For some plants the record holds the utility’s mailing address rather than the plant gate.

How much wastewater does Jacksonville STP treat?

Jacksonville STP treats an average of 5.44 MGD.

What is the NPDES permit for Jacksonville STP?

The facility discharges under NPDES permit ILL021661, currently effective, expiring December 2030.

Is Jacksonville STP in compliance?

Discharge monitoring reports show 1 violation at Jacksonville STP in the last three years, 1 of them effluent limit exceedances. The full history is available in Klarifi.

Who operates Jacksonville STP and how do I contact them?

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

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Jacksonville STP

Rural Route 3, Jacksonville, IL 62650 · Morgan County · Publicly Owned Treatment Works

Average flow: 5.44 MGD

Design flow: —

NPDES permit: ILL021661; Effective

Permit expires: December 2030

Population served: 19,446; CWNS 2022

Jacksonville STP is a publicly owned wastewater treatment works in Jacksonville, Morgan County, Illinois treating an average of 5.44 million gallons per day, serving about 19,446 residents. It discharges under NPDES permit ILL021661 (effective), which expires in December 2030, with 1 recorded violation in the last three years.

Treatment technology

Treatment structures and unit processes at Jacksonville STP.

Treatment structure data not yet analyzed for this facility.

Compliance snapshot (last 3 years)

Total violations: 1

Effluent violations: 1

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

Key contacts

2 verified contacts for Jacksonville STP, with validated emails and direct phone numbers.

Unlock 2 verified contacts

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

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Jacksonville 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 October 26, 2026; facility record last updated September 13, 2026.

Wastewater terms: POTW · MGD · NPDES permit · Inflow and infiltration · Ozonation · Activated sludge · all terms

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