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

Illinois Drought


System Information

System Description

Most of the community's supply comes from groundwater, but Mauvaise Terre Lake supplies water during higher demand periods. Lake Jacksonville is used only to increase levels in Mauvaise Terre Lake during emergencies. A valve at the 11 mgd treatment plant lets in additional water from Mauvaise Terre Lake as needed.

Satellite Communities and Water Districts

Alexander WD, Chapin, Concord, Franklin, Murrayville-Woodson Water Commission, North Morgan WD, and SMG WD
Locator map for Jacksonville

Population Served:





Water Source
Name Type Stream DA (sq mi) SA (ac) Capacity Year Est. Est. 2010 Cap. (ac-ft)
Mauvaise Terre Lake IR Mauvaise Terre Cr 32.6 143 627.9 1979 281.2
Lake Jacksonville IR Sandy Cr 10.8 465 5830 1986 5435
Groundwater GW

1989 Study:

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

USGS Gages:

No data available

Developments since 1989:

The city is considering dredging Mauvaise Terre Lake. The newly formed North Morgan County RWD connected to the system in 2007. Although groundwater access buffers the community from drought hardships, storage from Lake Jacksonville had to be released into Mauvaise Terre Lake during the 2005 drought.
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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