In partnership with the state Department of Commerce, we are leading a group of state agencies to identify actions to improve siting and permitting of clean energy projects in Washington. The council ...

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Rulemaking is when we propose and adopt rules to protect the environment and public health. The Washington State Legislature guides all state rulemaking through a law known as the Administrative ...

The water year begins Oct. 1 and ends Sept. 30. Three months before the calendar year changes, hydrologists and other water scientists mark the start of the new water year. Starting the water year in ...

WAC 173-443 restricts the use of hydroflurocarbons and other fluorinated gases with a Global Warming Potential (GWP) of more than 150. It also prohibits the manufacture and sale of products containing ...

Use this portal to filter and search for all of our regulatory information. We oversee many state and federal laws designed to protect Washington's land, air, and water. See our laws, rules, & ...

We value your input and want to hear from you as we continue to implement the Climate Commitment Act (CCA) across Washington state. Check out our current and upcoming opportunities to give your input, ...

Focus: Section 110 will be proposed as a new section of the rule. It is an outgrowth of efforts by the definitions work group (immediately above here) to help clarify when a material qualifies as ...