Maryland Environment Section 9-408

      (a)      Except as provided in subsection (b) of this section, and subject to § 9-409 of this subtitle, State primary drinking water regulations shall apply to every public water system in this State.

      (b)      The State primary drinking water regulations do not apply to a public water system that:

            (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 public water system to which the State primary drinking water regulations apply;

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

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