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Salem Stp, City Of

East Lake Drive, Salem, IL 62881 · Marion County · Publicly Owned Treatment Works

Average flow
1.21 MGD
Design flow
—
NPDES permit
ILL023264
Effective
Permit expires
December 2030
Population served
7,829
CWNS 2022

Salem Stp, City Of is a publicly owned wastewater treatment works in Salem, Marion County, Illinois treating an average of 1.21 million gallons per day, serving about 7,829 residents. It discharges under NPDES permit ILL023264 (effective), which expires in December 2030, with 20 recorded violations in the last three years.

Treatment technology

3 treatment structures and unit processes identified at Salem Stp, City Of.

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See the full treatment train at Salem Stp, City Of: structures, unit processes and planned upgrades, with exact unit counts.

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Compliance snapshot (last 3 years)

Total violations
20
Effluent violations
0

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

Key contacts

1 verified contact for Salem Stp, City Of, with validated emails and direct phone numbers.

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Names, validated emails and direct phone numbers for decision-makers at Salem Stp, City Of, plus the full compliance history and discharge data.

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Nearby wastewater treatment plants in Illinois

Odin STP

Odin · 6 mi away

0.08 MGD

Iuka Stp, Village Of

Iuka · 9 mi away

0.01 MGD

Sandoval Stp, Village Of

Sandoval · 10 mi away

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Junction City Stp, Village Of

Junction City · 11 mi away

0.04 MGD

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Kinmundy Stp, City Of

Kinmundy · 12 mi away

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Patoka Stp, Village Of

Patoka · 13 mi away

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Wamac Stp, City Of

Wamac · 14 mi away

0.14 MGD

Salem Stp, City Of: 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 18, 2026.

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


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