What is the address of Steeleville STP?

The address on the plant’s EPA facility record is 701 South Locust Street, Steeleville, IL 62288, in Randolph County. Its coordinates are 38.0017, -89.6483. For some plants the record holds the utility’s mailing address rather than the plant gate.

How much wastewater does Steeleville STP treat?

Steeleville STP treats an average of 0.25 MGD and is permitted for a design flow of 1.6 MGD.

What treatment technology does Steeleville STP use?

Klarifi has identified 2 treatment structures and unit processes at the Steeleville facility. The full treatment train, with exact unit counts, is shown in Klarifi with a free account.

What is the NPDES permit for Steeleville STP?

The facility discharges under NPDES permit IL0031241, currently effective, expiring May 2031.

Is Steeleville STP in compliance?

Discharge monitoring reports show 120 violations at Steeleville STP in the last three years, 75 of them effluent limit exceedances. The full history is available in Klarifi.

Who operates Steeleville STP and how do I contact them?

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

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Steeleville STP

701 South Locust Street, Steeleville, IL 62288 · Randolph County · Publicly Owned Treatment Works

Average flow: 0.25 MGD

Design flow: 1.6 MGD

NPDES permit: IL0031241; Effective

Permit expires: May 2031

Population served: 2,358; CWNS 2022

Steeleville STP is a publicly owned wastewater treatment works in Steeleville, Randolph County, Illinois treating an average of 0.25 million gallons per day against a permitted design capacity of 1.6 MGD, serving about 2,358 residents. It discharges under NPDES permit IL0031241 (effective), which expires in May 2031, with 120 recorded violations in the last three years.

Treatment technology

2 treatment structures and unit processes identified at Steeleville STP.

Available with a free Klarifi account

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

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Compliance snapshot (last 3 years)

Total violations: 120

Effluent violations: 75

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

Key contacts

Decision-makers at Steeleville STP.

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Nearby wastewater treatment plants in Illinois

Percy Stp, Village Of

Percy · 2 mi away

0.09 MGD

Willisville Stp, Village Of

Willisville · 3 mi away

0.04 MGD

Cutler Stp, Village Of

Cutler · 5 mi away

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Campbell Hill Stp, Village Of

Campbell Hill · 7 mi away

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Sparta - Southeast Stp, City Of

Sparta · 8 mi away

0.68 MGD

Chester STP

Chester · 11 mi away

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Ava Stp, City Of

Ava · 12 mi away

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Coulterville STP

Coulterville · 14 mi away

0.04 MGD

Steeleville 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 27, 2026.

Wastewater terms: POTW · MGD · NPDES permit · Inflow and infiltration · WWTP · Biosolids · all terms

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