Rulemaking at Ecology

Rules listed below are sorted by topic and indicate Ecology's intentions for rulemaking. We invite you to participate in our rulemaking processes. Here you will find rules in various stages of the rulemaking process.


  • Rulemaking that has be officially filed with the Washington State Legislature’s Code Reviser’s Office (filed a CR-101 form), and are sorted by topic,
  • Recently closed rulemakings. (closed rulemaking web pages are kept here for 2 years after the date of adoption),
  • Programs that are undergoing an exploratory process for rulemaking.

Under each topic below to see rulemaking underway, more information, and the rulemaking status including documents, timelines and contact information.