All persons who own or operate a public water system or for sections 200 and 201, any persons constructing a public water system project. This part shall apply to each public water system, unless the public water system meets all of the following conditions: (a) it consists of only distribution and storage facilities (and does not have any collection and treatment facilities); (b) it obtains all of its water from, but is not owned or operated by, a public water system to which such regulations apply; (c) it does not sell water to any person; and (d) it is not a carrier which conveys passengers in interstate commerce.
N.M. Admin. Code § 20.7.10.2