Our economic analyses support proposed rules and permits, as well as a number of other projects and publications. We use real-world data, often collected directly from stakeholders, to comprehensively ...

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 ...

The refinery began operating in 1954 and has about 285 employees and 200 contractors that work on the site. The facility processes crude oil into a variety of petroleum products. At full production, ...

We work to enhance Washington’s resilience to natural hazards in state coastal and shoreline areas. We pursue this mission through core activities designed to avoid or minimize the impacts natural ...

Fire danger is high in many areas because of hot, dry weather. Most of the state is still in a drought. Burn bans are in place across Washington. Check with your local fire district before lighting ...

Air quality burn bans are called by our agency, local clean air agencies, and tribes when air is unhealthy. A burn ban limits wood stove use and outdoor burning. Use the map below to find out which ...

We estimate there are thousands of abandoned wells in Washington. If you find an abandoned well on your property, you are required to work with a licensed well driller to properly close it up, a ...

Stormwater runoff can flow directly into fresh or marine waters, or it may go into a storm-drain system and continue through storm pipes until discharging into the environment. Stormwater management ...

Statewide General Permit for Biosolids Management (expired) – This statewide permit applies to all facilities subject to the Washington's biosolids program. When facilities receive final approval of ...

Our Underground Storage Tank (UST) program is one of the largest pollution prevention programs at Ecology. Every year, just over 3 billion gallons of fuel are stored underground. We inspect tank ...

Our Permitting and Reporting Information System (PARIS) database contains information about water quality permits, inspections, enforcement actions, and discharge monitoring reports (DMRs). Both ...

We follow up on wetland mitigation sites to ensure mitigation requirements are fulfilled. Permittees are required to meet the terms and conditions of their permits, including successful implementation ...