What is the address of Sullivan STP?

The address on the plant’s EPA facility record is Patterson Road, Sullivan, IL 61951, in Moultrie County. Its coordinates are 39.5927, -88.5969. For some plants the record holds the utility’s mailing address rather than the plant gate.

How much wastewater does Sullivan STP treat?

Sullivan STP is permitted for a design flow of 1 MGD. Its average daily flow is not available in the current EPA data.

What treatment technology does Sullivan STP use?

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

What is the NPDES permit for Sullivan STP?

The facility discharges under NPDES permit IL0021806, currently effective, expiring February 2027.

Is Sullivan STP in compliance?

Discharge monitoring reports show 47 violations at Sullivan STP in the last three years, 45 of them effluent limit exceedances. The full history is available in Klarifi.

Who operates Sullivan STP and how do I contact them?

Sullivan STP is a publicly owned treatment works in Sullivan, Illinois. Klarifi lists 3 verified decision-maker contacts for this facility, available with a free trial.

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Sullivan STP

Patterson Road, Sullivan, IL 61951 · Moultrie County · Publicly Owned Treatment Works

Average flow: —

Design flow: 1 MGD

NPDES permit: IL0021806; Effective

Permit expires: February 2027

Population served: 4,371; CWNS 2022

Sullivan STP is a publicly owned wastewater treatment works in Sullivan, Moultrie County, Illinois, serving about 4,371 residents. It discharges under NPDES permit IL0021806 (effective), which expires in February 2027, with 47 recorded violations in the last three years.

Treatment technology

2 treatment structures and unit processes identified at Sullivan STP.

Available with a free Klarifi account

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

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Compliance snapshot (last 3 years)

Total violations: 47

Effluent violations: 45

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

Key contacts

3 verified contacts for Sullivan STP, with validated emails and direct phone numbers.

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

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Nearby wastewater treatment plants in Illinois

Bethany Stp, Village Of

Bethany · 8 mi away

0.25 MGD

Lovington Stp, Village Of

Lovington · 9 mi away

0.28 MGD

Windsor Stp, City Of

Windsor · 10 mi away

0.45 MGD

Findlay Stp, Village Of

Findlay · 10 mi away

0.04 MGD

Arthur Stp, Village Of

Arthur · 10 mi away

0.59 MGD

Hammond Stp, Village Of

Hammond · 14 mi away

0.04 MGD

Humbolt STP

Humboldt · 15 mi away

0.03 MGD

Strasburg Stp, Village Of

Strasburg · 17 mi away

0.2 MGD

Sullivan 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 · Oxidation ditch · Anaerobic digester · all terms

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