We regulate water and hazardous waste activities at the Puget Sound Energy (PSE) Electricity Cogeneration Station in Ferndale. The facility began operating in 1994. A natural gas pipeline supplies the ...

Washington adopted a color-code for waste containers and lids in 2025. Studies show that standard bin colors and labels can improve recycling outcomes that lead to environmental benefits. Starting in ...

Completing this project will resolve water quality issues, help address invasive species concerns, and re-establish important habitat for juvenile salmonids by restoring 260 acres of estuarine and ...

Public comments are accepted over a 30-, 45-, or 60-day period. During that time, you can share your input with us about specific changes in the permits we regulate. We review all comments and then ...

Washington's recycled content law (Chapter 70A.245 RCW) sets minimum post-consumer recycled content (PCRC) standards for specific products. This page explains which products are subject to the law and ...

The first statewide law to create a coordinated and inclusive approach to environmental justice was passed by the Washington Legislature in 2021. Soon after, our Office of Equity & Environmental ...

Product stewardship, sometimes called Extended Producer Responsibility (EPR), places the focus on producers of materials that are impactful to the waste system and environment. The idea is that ...

We developed a tool to calculate when a proposed compensatory wetland mitigation project will adequately replace the functions lost due to wetland impacts. This tool, Calculating Credits and Debits ...

We regulate water and hazardous waste activities at the U.S. Oil and Refining Co. oil refinery, tank farm, and marine terminal in Tacoma. The refinery began operating in 1957, and has about 190 ...

In 1988, more than 85% of Washington voters said “yes” to a tax on hazardous substances to fund environmental cleanup and pollution prevention work. The Hazardous Substance Tax (HST) is the largest ...

The Beach Environmental Assessment, Communication & Health (BEACH) Program ensures that marine water is safe to swim and play in and informs the public if water doesn't meet swimming standards.

If a business emits air pollution, it is probably regulated by Ecology or a local clean air agency. This may require registering every year. A business must pay a yearly fee based on the amount of air ...