70 ILCS 3715/26

(70 ILCS 3715/26) (from Ch. 111 2/3, par. 249) Sec. 26. With respect to territory outside its corporate limits which is not held by it for reservoir purposes but which territory is within the watershed that feeds a reservoir of the authority, the authority may, by ordinance, prevent pollution of waters which feed its reservoir for a distance of 5 miles upstream from the headwaters of its reservoir and may abate any cause of pollution within that area as a nuisance. (Source: Laws 1957, p. 1599.)