Using a new “non-targeted” approach, UW and UW Tacoma researchers screened samples from multiple regions of Puget Sound to look for potentially concerning chemicals.
The waters of Puget Sound support many species, including mussels, salmon and killer whales. But researchers know that runoff from land in the urbanized areas might contain chemicals that could harm these creatures, even if it’s not always clear which chemicals are the most harmful.
Existing methods track specific chemicals of known concern. Until recently, however, there was no way to find out what other potentially harmful compounds might be present in the water.
Using a new “non-targeted” approach, researchers at the University of Washington and UW Tacoma screened samples from multiple regions of Puget Sound to look for other concerning chemicals. The team identified 64 chemicals never detected before in this waterway. Eight chemicals were at potentially hazardous concentrations that will need further investigation. The team published these results Dec. 30 in Environmental Science & Technology.
“Historically we’ve done a decent job of categorizing legacy chemicals in Puget Sound, but we also know there are a lot more chemicals that get into the water every day,” said senior author C. Andrew James, a research scientist at the Center for Urban Waters at UW Tacoma. “If we can understand what’s there and at what concentrations it’s occurring, then we can start to figure out which chemicals will likely impact the health of fish, killer whales and other marine organisms.”
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