(1) An adequate and potable supply of water must be provided. Water may be used from an approved public water supply system or from a source that meets the requirements of (2) and (3).

(2) Before a license may be issued, an establishment using an individual, shared, or multiple user water supply must submit the following to the department or its designee coliform bacteria and nitrate test results that meet the requirements of ARM 17.38.207.

(a) A supplier of an individual, shared, or multiple user water supply shall conduct a coliform bacteria test of the system at least twice a year with one sample collected between April 1 through June 30 and the second sample collected between August 1 through October 31, and;

(b) conduct a nitrate test of the system at least once every three years. Water tests must be analyzed at a certified laboratory. A supplier shall keep sampling result records for at least three years.

(3) Nonpotable water sources must be marked "not for human consumption".

(4) Plumbing must be installed and maintained in a manner to prevent cross connections between the potable water supply and any nonpotable or questionable water supply or any source of pollution through which the potable water supply might become contaminated. The potable water system must be installed to preclude the possibility of backflow. A hose may not be attached to a faucet unless a backflow prevention device is installed.

(5) A water supply system is determined to have failed and to require treatment, replacement, repair, or disinfection, when:

(a) it exceeds the maximum contamination levels allowed in ARM Title 17, chapter 38, subchapter 2.

(6) Extension, alteration, repair, or replacement of a water supply system or development of a new water supply system must comply with all applicable state and local laws.

(7) Bottled and packaged potable water may only be obtained from a licensed and approved source and shall be handled and stored in a manner that protects it from contamination.