(1) The establishment shall always provide an adequate and potable supply of water, as approved by the local regulatory authority.

(2)  If an existing public water supply of satisfactory quantity and pressure is available, and the owner of the public water system agrees to provide service, connection must be made to the public water system and its supply used exclusively except for non-potable water uses approved by the department in writing.

(3) Public water supply systems must be approved by the Department of Environmental Quality and meet the requirements of ARM 17.38.101 et seq., or, if applicable, must be approved by the U.S. Environmental Protection Agency.

(4) Non-public water supply systems must meet the requirements of Food and Consumer Safety (FCS) Circular 1, 2016 edition.

(5) For campgrounds, the local regulatory authority, upon consultation with the department, may allow a variance from the requirements of (1) for a potable water supply upon demonstration by the applicant that the deviation does not have the potential to cause adverse public health effects. The applicant must submit a plan that demonstrates that the public is informed of the absence of a potable water supply, and that the public is warned that the existing water in the area is not suitable for drinking or other uses that may adversely affect public health. This deviation will be noted on the establishment license.