We are committed to providing equal opportunities, resources, and access to all Washingtonians, regardless of abilities or circumstances.

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 ...

SEPA guidance for determining lead agency and evaluating the proposal. Under the State Environmental Policy Act (SEPA), most new proposals are reviewed by a designated “lead agency.” While this is ...

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 Sammamish River is a highly modified waterbody with multiple water quality problems. It was originally called Squak Slough and wound about 30 miles through a large wetland complex to Lake ...

We offer some flexible options to submit data, apply for permits, or file reports. For instance, contractors can apply online for a construction stormwater permit, or a plant operator can file ...

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, ...

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 ...