By Nate Seltenrich

As the “Fish-SMART” signs on local piers warn, the tissues of fish reeled in from San Francisco Bay waters can contain mercury or PCBs, but a new RMP report reminds us of a third contaminant of concern to human health: dioxins. The report, due out in October 2018 and prepared by staff of the San Francisco Estuary Institute and the SF Bay Regional Water Quality Control Board, confirms that while levels of this toxic contaminant in sediments nearshore have declined somewhat in the last few decades, dioxins persist in the food chain in fish such as white croaker. Dioxins are ending up in the Bay via atmospheric fallout and runoff. “Basically any burning process can potentially produce dioxins,” says SFEI scientist Don Yee, and even if individual sources aren’t large “it all adds up.”

Read More

Dioxins Are Sticking Around Nearshore and in Fish, RMP Reports

By Nate Seltenrich

As the “Fish-SMART” signs on local piers warn, the tissues of fish reeled in from San Francisco Bay waters can contain mercury or PCBs, but a new RMP report reminds us of a third contaminant of concern to human health: dioxins. The report, due out in October 2018 and prepared by staff of the San Francisco Estuary Institute and the SF Bay Regional Water Quality Control Board, confirms that while levels of this toxic contaminant in sediments nearshore have declined somewhat in the last few decades, dioxins persist in the food chain in fish such as white croaker. Dioxins are ending up in the Bay via atmospheric fallout and runoff. “Basically any burning process can potentially produce dioxins,” says SFEI scientist Don Yee, and even if individual sources aren’t large “it all adds up.”

Read More
About the author

Nate Seltenrich is a freelance science and environmental journalist who covers infrastructure, restoration, and related topics for Estuary. He also contributes to the San Francisco Chronicle, Sonoma and Marin magazines, the journal Environmental Health Perspectives, and other local and national publications, on subjects ranging from public lands and renewable energy to the human health impacts of climate change. He lives in Petaluma with his wife, two boys, and four ducks. www.nate-reports.com

Related Posts

blue whale feeding

Blue Whales Consume Microplastic Particles by the Billion

The age of humans, termed the Anthropocene, might just as well be considered the age of plastic. The dangerously durable material, made ubiquitous in products and packaging through the late 20th century, has inundated our planet’s environment. Today, miniscule plastic pieces are present in deep-ocean sediment, high-mountain snow and just about...

Sharing Science Across Barriers

Growing up on Chicago’s South Side, an urban landscape of metal and concrete, Miguel Mendez had limited access to open spaces, and always dreamed of traveling. Yet there in the city, he got his first introduction to environmentalism. “In some of the places I lived in Chicago, environmental activists are...

The Long Haul to Restore San Joaquin Spring-Run Chinook

When a team of fish biologists was tasked with restoring spring-run Chinook salmon in the San Joaquin River in 2006, none of them quite knew where to begin. The thirsty farms that crowd the river on both sides had taken almost all the water out of it most years since...