Drought Vulnerability of Illinois' Community Surface Water Systems, Illinois State Water Survey

Illinois Drought

SLM Water Commission

System Information

System Description

The Summerfield-Lebanon-Mascoutah (SLM) Water Commission receives water that is pumped from the Kaskaskia River into an off-channel reservoir at up to 3900 gpm and is then relayed to a 5.6 mgd treatment plant.

Satellite Communities and Water Districts

Summerfield, Lebanon, Mascoutah, Fayettevile, Freeburg, Hecker, New Baden, New Memphis, Smithton, Trenton, and Tri-Township WD
Locator map for SLM Water Commission

Population Served:



St. Clair


Water Source
Name Type Stream DA (sq mi) SA (ac) Capacity Year Est. Est. 2010 Cap. (ac-ft)
Kaskaskia River RW Kaskaskia R 4509
Off-Channel Res. OCR 0 7 77

1989 Study:

50-year drought yield sufficient at present level of water use.

USGS Gages:

Kaskaskia River near Venedy Station (05594100)

Developments since 1989:

Chart of Annual Raw Water Production (mgd)

Notes and Terminology

Vulnerability Report

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Illinois State Water Survey

2204 Griffith Dr., MC-674
Champaign, IL 61820-7463
Email us with questions or comments.


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