Next Day Delivery: PCBs, Plastics, and Mercury All in One Package

By Alastair Bland

The slow, downstream chemical migration of legacy contaminants like mercury and PCBs into the Bay is something that Lester McKee and his colleagues at the San Francisco Estuary Institute hope to cut short. Using funding from the Regional Monitoring Program, they’ve been sampling creeks that enter the central and southern San Francisco Bay for years, identifying the most contaminated waterways. “We want to short-circuit the conveyor belt that delivers the pollutants we’re concerned about into the food web,” says McKee.  Today we are producing a new but similar legacy in the form of what scientists classify as “contaminants of emerging concern,” such as microplastics. “The sooner we can stop the inputs of these contaminants,” says SFEI’s Alicia Gilbreath, “the sooner the Bay can have a chance to recover.”

Read More

Related Content

About the author

A native to San Francisco, Alastair Bland is a freelance journalist who writes about water policy in California, rivers and salmon, marine conservation and climate change. His work has appeared at NPR.org, Smithsonian.com, Yale Environment 360 and News Deeply, among many other outlets. When he isn't writing, Alastair is likely riding his bicycle uphill as fast as he can.

Related Posts

subisdence on 4 delta islands map

Asked to suggest an appropriate future for four Delta islands owned by the Metropolitan Water District, it’s difficult not to want the moon.

Why not richer rice fields, more wetlands, better boat launches, extended trails, even eco-tourism? ? A new survey for the Delta Islands Adaptation Project, funded by a Prop 1 Watershed Restoration Grant, wants the public’s opinion on the importance of 10 possible land-use objectives leading to the selection of one...
chart by Hutton

An examination of 50 years of records reveals an apparent seasonal bias in estimates of freshwater flow from the Delta to the San Francisco Estuary.

The seasonal bias suggests flows were overestimated during the summer months and underestimated during the winter. Estimates of Delta outflow use a measurement called net Delta outflow index (NDOI), which is determined by taking the amount of Delta inflow, from sources such as the Calaveras, Sacramento, and San Joaquin rivers,...
diagram of fish net trawl

Fish monitoring surveys in the San Francisco Estuary net different numbers of different fish species depending upon when and how they sample.

According to a new study published in San Francisco Estuary and Watershed Science, even surveys that target the same part of the water column can come up with significantly different catches. The study’s authors analyzed decades worth of data from the California Department of Fish and Wildlife (CDFW) Fall Midwater...