What systems are regulated by the Safe Drinking Water Act?
The SDWA regulates public water systems. There are three types of public water systems in Illinois: community; transient, non-community; and non-transient, non-community water systems. The Illinois Environmental Protection Agency (IEPA) regulates community water systems and IDPH regulates non-community systems. This handbook focuses on the two types of non-community systems: • A transient, non-community water system regularly serves at least 25 individuals, but not the same individuals, for more than 60 days per year. For example, a rest area, campground or restaurant with less than 25 employees on its own water supply is considered a transient water system. • A non-transient, non-community water system regularly serves at least 25 of the same people more than six months per year. For example, a school or business with its own water supply is considered a non-transient system. The regulations which govern the SDWA for Illinois non-community public water supplies are IDPH regulation, 77
