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Information for residents of Washington, to help you better understand the work Ecology does, find what's happening near you, and see what you can to do to help protect our environment!

We propose updates to the human health criteria in Table 240 of WAC 173-201A-240, Toxic substances, to: Replace 143 state-adopted human health criteria for 73 pollutants that the Environmental ...

This plan was adopted by the Washington State Department of Ecology following the Open Data Policy established by the Office of the Chief Information Officer (OCIO). Measure: Number of times ...

The list of rules below are categorized by topical areas. These links will take you to the existing rule language on the Washington State Legislature's Code Reviser's web page. The Office of the Code ...

The Washington State Department of Ecology (Ecology) started a rulemaking to revise the Safer Products Restrictions and Reporting rule—Chapter 173-337 WAC, aiming to reduce PFAS in consumer products.

We are investing federal settlement and state penalty funds from Volkswagen to fund clean transportation grants. These grants accelerate access to zero-emission transportation options and spread ...

Diesel exhaust is the most harmful air pollutant in Washington. It contributes more than 70 percent of the total cancer risk from toxic air pollution. Diesel exhaust causes or contributes to asthma, ...

Under RCW 42.56.120(2), we are allowed to recover costs directly related to the copying of public records. We cannot charge a fee for inspection of records, or staff time spent on locating records or ...

Commercial and industrial businesses that emit large amounts of air pollution must get an air operating permit. An air operating permit is a master document that lists all of the air pollution ...

The easiest way to avoid food waste is to not overbuy. Proper storage of what you do purchase is another way to prevent food waste. Home composting is an excellent option for what can't be used or ...

Lea la historia de Hanford en español aquí. The past, present, and future of the Hanford Site is long and complex, dating back well before the site's construction in the 1940s and long into the future ...