Illinois Groundwater and Water Well Statistics
Few states can accurately or confidentially determine how many residential wells are in place. For each region, the American Housing Survey by the U.S. Census provides regional data.
Illinois is found in the Midwest, along with these other states: Ohio, Michigan, Indiana, Illinois, Wisconsin, Minnesota, North Dakota, South Dakota, Iowa, Nebraska, Kansas, and Missouri.
The last American Housing Survey Census indicates this region had 3,990,0002 households served by residential wells, with an average of 2.633 persons per household. The USGS estimates the population of self-supplied water supply users in Illinois to be 1,150,000, all of which are groundwater supplied.
- 1,146 community water systems use groundwater for 3,188,000 people
- 424 non-community, non-transient water systems use groundwater for 120,000 people
- 3,031 non-community, transient water systems use groundwater for 323,000 people
- 5,250 irrigation wells used serving 1,480 farms and 527,000 acres