Started in February 2023, we hold quarterly auctions where businesses and individuals participating in Washington's cap-and-invest program can buy emissions allowances. To participate in these ...

The Walla Walla basin extends into both Washington and Oregon, and crosses Tribal boundaries. The basin has a long history of challenges with water availability, including over appropriation of water ...

Old orchards in Central Washington left lead and arsenic in soil. Builders must check land history, test soil, cleanup ...

Increasing the number of zero emission vehicles on Washington's roads will reduce total greenhouse gas emissions by the equivalent of 1 million metric tons of carbon dioxide a year by 2030. In 2020, ...

Channel migration zones are areas in a floodplain where a stream or river channel can be expected to move naturally over time in response to gravity and topography. Water bodies such as rivers and ...

The Yakima Basin is home to 400,000 people and a $4.5 billion agriculture industry. With warming winter temperatures threatening aquifers and snowpack, the Basin is facing the challenges of water ...

Register for the webinar to get your meeting ID and passcode. To hear the webinar better or to call in only, use your phone (instead of the computer) to call 253‑215‑8782. Agenda: Presentation, ...

A 2016 Washington State Supreme Court decision changed how counties decide to approve or deny building permits that use wells for a water source. In the Whatcom County vs. Hirst, Futurewise, et al.

We're working to reduce polluted runoff from streets, forests, and farms. When it rains, water flows across the land, streets, and sidewalks. Pollutants are carried by this water into local streams, ...

Businesses that generate any amount of dangerous waste are responsible for this waste from cradle to grave. In Washington state, the Dangerous Waste Regulations determine what dangerous waste is, and ...

Wetlands are protected by local, state, and federal laws. Applicants with development proposals that may adversely affect wetlands must apply mitigation sequencing before permitting agencies consider ...

The background section of the SEPA environmental checklist helps applicants, agencies, and reviewers fully understand all aspects of a proposal, including related activities. Lead agencies use this ...