About us. Our vision: Our partnerships protect and sustain healthy land, air, water, and climate in harmony with a strong economy. Our mission: To protect, preserve, and enhance …

Who we are. Our agency is dedicated to preserving and protecting the environment in Washington. To learn how we preserve and protect Washington's land, air, and water for today …

Our mission is to keep Washington waters clean. Use this site to find out if a lake, stream, or marine beach near you is healthy or polluted. Learn about water cleanup plans and how we’re …

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 …

Wetlands. Washington's wetlands protect water quality, reduce flooding, provide aquifer recharge for drinking water and other uses, and provide critical habitat for fish and wildlife.

Water supply. We manage water resources to benefit all Washingtonians and to protect the natural environment for current and future generations. Our vision is that Washington State's …

The Climate Commitment Act (CCA) caps and reduces greenhouse gas emissions from Washington’s largest emitting sources and industries, allowing businesses to find the most …

Groundwater quality standards. The goal of the groundwater quality standards is to maintain the highest quality of groundwater by reducing and eliminating groundwater contamination. We …

Air & Climate. Everyone deserves clean air to breathe and a sustainable future that responds to challenges presented by climate change. To reach these goals, we regulate harmful emissions …

The future of Ecology. Our 2019 - 2021 Strategic Plan outlines the challenges we're facing, and the steps we're taking to ensure that Washington’s environment is protected for generations to …