415 ILCS 45/9.1

"Exempt Community Water Supply" means any community water supply which meets all of the following requirements:

(1) consists only of distribution and storage facilities and does not have any collection and treatment facilities;

(2) obtains all of its water from, but is not owned or operated by, a community water supply that is required to employ a Class A, Class B, Class C, or Class D community water supply operator;

(3) does not sell water to any person; and

(4) is not a carrier that conveys passengers in interstate commerce.