Started in February 2023, we hold quarterly auctions where businesses and individuals participating in Washington's cap-and-invest program can buy emissions allowances. To participate in these ...

The Walla Walla basin extends into both Washington and Oregon, and crosses Tribal boundaries. The basin has a long history of challenges with water availability, including over appropriation of water ...

We're looking for input on drought impacts and relief, to inform future draft rule language for WAC 173-166 Emergency Drought Relief. Join one of our events - in person, or online. Read the focus ...

In addition to laboratory accreditation, we are available to assist you with questions regarding laboratory methods, performance testing, compliance, and all things lab-related. Our unit staff ...

Ecology is hosting an online session to learn from community members about environmental justice considerations that may be connected to this rule. This is not a formal public hearing, we will not be ...

According to data from 2023, more than 150 million pounds of plastic were used in trash bags and beverage containers covered under Washington’s plastics law. Thirty-five companies were fined a ...

In 2024, Washington adopted the Cookware Containing Lead law (Chapter 70A.565 RCW) to prohibit the sale of cookware containing lead in Washington. As of January 1, 2026: No manufacturer may make, sell ...

The City of Tacoma, in partnership with Western Washington collaborators, will characterize stormwater and stormwater sediment concentrations for several Contaminants of Emerging Concern (CEC). They ...

El Departamento de Ecología está comenzando el proceso de elaboración de normas para enmendar el Capítulo 173-443 WAC, norma de Hidrofluorocarbonos (HFC ) y otros gases fluorados de efecto invernadero ...

The draft permit we propose to reissue to Ste Michelle Wine Estates - Canoe Ridge Winery authorizes the discharge of process wastewater to a single-lined evaporation lagoon. You can view the documents ...

Our new Puget Sound Climate Resilient Riparian Systems grant program was developed in partnership with the Washington State Conservation Commission and Bonneville Environmental Foundation. Program ...