Exposure disparities by income, race and ethnicity, and historic redlining grade in the greater Seattle area for ultrafine particles and other air pollutants

A University of Washington study found that low-income and minority communities in the greater Seattle area are exposed to significantly higher levels of ultrafine particles (UFPs) and other air pollutants compared to wealthier, predominantly white neighborhoods. The research also revealed that neighborhoods historically designated as 'hazardous' under 1930s redlining practices continue to experience disproportionately poor air quality today. Disparities were most pronounced for UFPs, which are tiny particles linked to heart, lung, and brain health problems, and least pronounced for fine particulate matter (PM2.5).

Open full document

Notes

This study examines present-day air pollution exposure disparities in the greater Seattle, Washington area by income, race, ethnicity, and historical redlining grade, focusing on ultrafine particles (UFPs) compared with black carbon, nitrogen dioxide, and fine particulate matter. Using 2019 mobile monitoring data and demographic data, the authors found that UFP concentrations were highest for blocks with low incomes, Black residents, HOLC Grade D, and ungraded industrial areas. The study concludes that historically marginalized groups face disproportionately higher exposures to multiple air pollutants, with disparities most pronounced for UFPs.

Notes

Message