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

Illinois Drought

Rend Lake Intercity Water System

System Information

System Description

Water is pumped from Rend Lake directly to a 19.1 mgd treatment plant. The State of Illinois has access to 109,000 ac-ft of the lake's total storage of 175,059 ac-ft. Rend Lake’s allocation is currently 17.5 mgd and negotiations are being conducted with the State to increase this allocation.

Satellite Communities and Water Districts

Benton, Mount Vernon, and 64 other community water systems
Locator map for Rend Lake Intercity Water System

Population Served:





Big Muddy
Water Source
Name Type Stream DA (sq mi) SA (ac) Capacity Year Est. Est. 2010 Cap. (ac-ft)
Rend Lake IR Big Muddy R 488 16187 175059 1986

1989 Study:

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

USGS Gages:

No data available

Developments since 1989:

In 2007, two coal-based industries were allocated a total of 14.5 mgd.
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
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