Hide Alert
Red alert icon for service disruption.

Our website will be unavailable from 8 to 9 p.m. on Dec. 19 for scheduled maintenance.

Water & Shorelines

We improve and protect water quality, manage and conserve water resources, and effectively manage coastal and inland shorelines to assure our state has sufficient supplies of clean water for communities and the natural environment.

Water quality

See if waters near you are healthy. Learn about cleanups, wastewater, runoff, and how Puget Sound is changing.

Water supply

We manage the state's water supply to meet the needs of people, farms, and fish.

Puget Sound

The Puget Sound basin is vital to Washington’s culture, environment, and economy.

Shoreline & coastal management

Partnering to preserve and protect shorelines and oceans while supporting the needs of communities.


We are charged with protecting, restoring, and managing wetlands because of their key role in watershed health.