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Two new reports evaluate the influence of people, climate, and the Pacific Ocean on oxygen levels in South and Central Puget Sound, as well as the larger Salish Sea.

Let’s be clear. Ocean acidification is real. Determining the causes, impacts, and identifying potential solutions are high priorities for our agency and the state.

Ecology’s Marine Sediment Monitoring Team tracks the health of the sediments and invertebrates at the bottom of Puget Sound. They've been on the decline for decades – what could be contributing?

We stopped using polychlorinated biphenyls (PCBs) 35 years ago, yet it continues to contaminate almost every water body in Washington.

"Involving citizen science volunteers is vital to our monitoring program. Especially in smaller communities," said Julianne Ruffner, manager of Ecology's BEACH program.

Late summer 2017 brings warm air temperatures and drier conditions throughout Puget Sound. Streamflows in the region's northern rivers are lower than rivers in South Puget Sound.

Scientists from our Toxic Studies Unit recently completed the first round of sampling as part of a new PFAS study in Lake Washington and its tributaries.

Soap isn’t the answer when there’s an oil spill.

We explain how the Salish Sea Model and other scientific computer models help us better understand the world around us.

We're considering allowing more water to spill over dams to help salmon migrate.