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March 16, 2026Environmental Justice

Breathing Unequal Air: PM 2.5 Exposure and Life Expectancy Inequities Across U.S. Neighborhoods

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Authors

STShreepada Tripathy

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Overview

Nationwide ecological analysis reveals significant life expectancy disparities linked to PM2.5 exposure, highlighting health inequities.

Key Points

  • To evaluate the relationship between long-term exposure to PM2.5 and life expectancy across U.S. neighborhoods.
  • Conducted ecological analysis of 66,717 census tracts
  • Used PM2.5 data from the Environmental Protection Agency
  • Included sociodemographic covariates from the American Community Survey
  • Applied multivariable linear regression to assess associations
  • Each 1 µg/m3 increase in PM2.5 was linked to a 0.23-year reduction in life expectancy
  • After sociodemographic adjustment, the reduction remained at 0.19 years (p < 0.001)
  • Stronger negative association found in areas with higher Black resident proportions

Cite This Study

Shreepada Tripathy (2026) studied this question.

synapsesocial.com/papers/69b79e7c8166e15b153abebahttps://doi.org/10.1177/19394071261425599
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