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Bay Blog: fish consumption advisories

Jan
22
2013

Chemical contaminants persist across Chesapeake Bay watershed

Chemical contaminants continue to afflict the Chesapeake Bay watershed, raising concern over water quality and the health of fish, wildlife and watershed residents.

Close to three-quarters of the Bay’s tidal waters are considered impaired by chemical contaminants, from the pesticides applied to farmland and lawns to repel weeds and insects to the household and personal-care products that enter the environment through our landfills and wastewater. But so-called “PCBs” and mercury are particularly problematic in the region, according to a report released last week by the U.S. Environmental Protection Agency (EPA), U.S. Geological Survey (USGS) and U.S. Fish and Wildlife Service (USFWS).

Both PCBs—short for “polychlorinated biphenyls”—and mercury are considered “widespread” in extent and severity, concentrating in sediment and in fish tissue and leading to fish-consumption advisories in a number of rivers and streams.

The District of Columbia, for instance, has issued such advisories for all of its water bodies, asking the public not to consume catfish, carp or eels, which are bottom-feeding fish that can accumulate chemicals in their bodies. While the District’s Anacostia and Potomac rivers raise the greatest concern in the watershed when it comes to fish tissue contamination, a November report confirmed that many Anacostia anglers are sharing and consuming potentially contaminated fish, sparking interest in reshaping public outreach to better address clean water, food security and human health in the area.

While PCBs have not been produced in the United States since a 1977 ban, the chemicals continue to enter the environment through accidental leaks, improper disposal and “legacy deposits”; mercury can find its way into the atmosphere through coal combustion, waste incineration and metal processing.

Exposure to both of these contaminants can affect the survival, growth and reproduction of fish and wildlife.

The Chesapeake Bay Program will use this report to consider whether reducing the input of toxic contaminants to the Bay should be one of its new goals.

Read more about the extent and severity of toxic contaminants in the Bay and its watershed.



Nov
08
2012

New study shows Anacostia fishermen are sharing, consuming contaminated fish

A yearlong survey of anglers along the Anacostia River has confirmed that many fishermen are catching, sharing and consuming contaminated fish.

While fishing advisories in Maryland and Washington, D.C., have been in place for more than two decades, these warnings are often not seen, understood or listened to—and as many as 17,000 residents could be consuming fish caught in the Anacostia.

Image courtesy Len Matthews/Flickr

Located less than one mile from the nation’s capital, the Anacostia River has long suffered environmental degradation. Polluted runoff from urban streets and hazardous waste sites has caused toxic chemicals to build up in the water and in the bodies of fish, which could cause disease or development disorders in those who consume them.

According to the results of a survey that studied the social behavior of Anacostia anglers, a complex set of factors is driving the sharing and consuming of locally caught and potentially contaminated fish: past experience and present beliefs, a lack of awareness of the health risks involved and an overriding desire to share their catch with those who might otherwise go hungry.

Image courtesy LilySusie/Flickr

Research conducted through hundreds of interviews along fishing “hotspots” and a community survey that canvassed the lower Anacostia watershed found that 40 percent of fishermen had never heard that fish from the Anacostia could make them sick. Some anglers thought visual cues—like obvious lesions, cloudiness in the eyes or the color of a fish’s blood—would help them determine the health of a fish, or that related illnesses would soon be apparent rather than chronic or long-term. If a fisherman had not fallen ill from a meal of fish before, then he might perceive the fish to be healthy or think that his preparation methods made it clean.

Research also found that current advisories do not resonate among diverse anglers. Just 11 percent of fishermen had seen a sign or poster, and even fewer had received warning material with a fishing license or reviewed related information online. And English-only outreach is not effective among a population in which one-quarter speaks a language other than English at home.

Image courtesy 35millipead/Flickr

But how can Anacostia anglers be reached?

"The answer to this problem will be far more complex than simply telling anglers not to share their catch,” said Steve Raabe, principal of the Maryland-based research firm that conducted the survey.

The Anacostia Watershed Society, among the partners behind the survey, agrees. While the non-profit’s director of public policy acknowledged this study is not a “silver bullet solution,” he hopes it will bring about positive change.

“We are hoping [the study] will be the catalyst to engage all stakeholders—federal and local governments, food security and hunger organizations, environmental and health organizations, as well as residents—to come up with answers,” Brent Bolin said.

“Through this research effort, we have already begun identifying potential solutions,” Bolin continued, from directing better messaging to affected populations to expanding urban gardens, farmers markets and other programs that will address the long-term challenges of clean water, food security and human health.



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