The Associated Press

SEATTLE (AP) -- Washington's Department of Ecology says the environmental health of Seattle's Elliott Bay has improved over the past decade.

The department released results Friday of a 2007 study of sediments in the urban bay. It follows up on samples taken in 1998.

The study says there are lower levels of some metals as mercury, lead and tin, and reductions in PCBs and some other chemical compounds. However, some contaminants increased, including zinc and plasticizers. Overall, it found the sediments were less toxic and that clams, worms and other bottom-dwelling creatures were healthier.

A separate study by the state Department of Fish and Wildlife and the National Oceanic and Atmospheric Administration found that liver cancer in English sole in Elliott Bay also has declined in the last 10 years.

Copyright 2009 The Associated Press.

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