Requires the department of ecology, upon request by a municipal water supplier, to amend the water rights documents and related records to identify the following water rights as being used for municipal water supply purposes if the following water rights were held or acquired by a municipal water supplier before July 1, 2016, and are not currently being used for commercial agriculture or dairy purposes: (1) Irrigation purpose of use water rights;

(2) Agricultural irrigation purpose of use water rights; and

(3) Dairy purpose of use water rights.

Provides that the above-mentioned requirement applies to water resource inventory areas 54, 55, 56, and 57.