Includes the following as an option of providing evidence of an adequate water supply when applying for a building permit: A water well report for a groundwater withdrawal exempt from permitting that is not prohibited by an applicable water resources management rule adopted by the department of ecology.

Authorizes a county or city to: (1) Impose conditions on building permits requiring connection to certain existing public water systems; and

(2) In providing for the protection of the quantity of groundwater used for public water supplies, rely on or refer to applicable water resources management rules.

Authorizes certain local governments, in approving a subdivision, dedication, or short subdivision, to rely on or refer to applicable water resources management rules to determine if appropriate provisions have been made for potable water supplies.

Requires a permit approval to make beneficial use of public waters to be conditioned to: (1) Protect levels or flows;

(2) Comply with applicable mitigation requirements established in the rule setting forth minimum flows or levels; or

(3) Mitigate impacts to fish or aquatic habitat.

Requires the department of ecology to collect an additional fee of three hundred dollars for certain constructed wells.

Creates the water resources project account.