The residents of the Georgetown and South Park neighborhoods in Seattle鈥檚 Duwamish Valley now know how much diesel exhaust they are exposed to. The data were collected by the 91探花 School of Public Health and Puget Sound Sage, a nonprofit coalition in Seattle. A on findings from the air pollution study are published online Sept. 13.
A large volume of traffic travels through these South Seattle communities due to nearby highways, industry, train routes, and the Port of Seattle. Sixty percent of neighborhood residents surveyed in 2009 by Puget Sound Sage believed pollution from commercial trucks affected the health of their families.聽 Long-term occupational exposures to high concentrations of diesel exhaust have been linked to respiratory and cardiovascular health problems as well as cancer.
鈥淩esidents were most concerned about commercial truck traffic. They see these trucks travel through their neighborhoods every day. They wanted us to monitor pollution levels where people lived,鈥� said Dr. Julie Fox, a senior fellow in environmental and occupational health sciences at the 91探花School of Public Health.
It was in response to community concerns and support from the Kresge Foundation that the 91探花School of Public Health partnered with Puget Sound Sage to help residents measure levels of diesel exhaust in the South Park and Georgetown neighborhoods.
“We were able to develop a much more refined understanding of exposure聽 and the impacts of various sources of exposure 聽for this particular area of the city. Using the skills and expertise from 91探花scientists to respond to community concerns, we were able to provide detailed community-level data on pollutants that are markers of diesel exhaust,” said Fox.
Researchers collected data over a two-week period in summer 2012 and winter 2012-2013 on four primary pollutants that serve as markers of traffic-related air pollution. They are 1-nitropyrene, a polycyclic aromatic hydrocarbon that is a by-product of combustion from diesel engines; black carbon, oxides of nitrogen, and particulate matter less than 2.5 渭m in diameter.
The researchers also compared these measurements to pollutants measured in residential sites in Queen Anne and Beacon Hill, which are located atop hills and have less commercial truck traffic.
Pollution levels in Seattle fall within Environmental Protection Agency national standards for air pollution., The study, however, 聽was not designed to determine compliance with standards, and聽1-nitropyrene and black carbon are not regulated.
鈥淐hoosing diesel-specific markers limits direct comparison to other metropolitan areas, but gives us confidence that among the different sources of air pollution we characterized diesel exhaust,鈥� said Fox.
Results indicate that residents of South Park and Georgetown are likely exposed to higher levels of diesel exhaust than residents of 聽Beacon Hill and Queen Anne. Also, within the two Duwamish Valley neighborhoods, pollution levels varied, even across small areas. Residents near busy roads and industrial areas faced higher levels of diesel exhaust pollution.
Other 91探花Environmental and Occupational Health Sciences researchers 聽who worked on the Diesel Exhaust Exposure in the Duwamish Study, also known as DEEDS,聽 include Dr. Joel Kaufman, Jill Schulte,聽 Dr. Sheryl Magzamen, a former postdoctoral research scientist, and Nancy Beaudet, of the 91探花Occupational and Environmental Medicine Clinic.
The project is funded by聽.
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