Establishes the Washington waters act.

Requires the department of ecology to administer the provisions of this act to significantly reduce risks to public health and safety, economy, and environmental vitality by evaluating, ranking, and funding projects that affect a broad geographic area and are consistent with: (1) Reducing storm water pollution from existing infrastructure and development;

(2) Reducing the risk of flooding, protecting against damage caused by floods, and protecting or restoring naturally functioning areas where floods occur; and

(3) Improving the availability and reliability of water supplies for instream and out-of-stream uses.

Creates a statewide annual special benefit assessment to provide storm water, flood control, and water supply infrastructure throughout the state.

Creates the water infrastructure account.

Provides for submission of this act to a vote of the people.