Exposure to fine particulate matter (PM2.5) is associated with the development of diseases and premature death. However, little is known about the potential PM2.5 exposure of incarcerated populations. In this paper, we used satellite-derived data to assess outdoor PM2.5 concentrations at 1,593 prisons in the contiguous U.S. from 1998 to 2022. Across our study period, despite overall national decreases in PM2.5 concentrations and disparities, prisons on average experienced higher pollution than the nonincarcerated U.S. population. In 2022, over 500 prisons had spatially averaged concentrations higher than the population-weighted concentrations of their home states. We also found evidence that in 12 states, state and federal prison populations systematically had higher PM2.5 than the nonincarcerated populations in those states; similar findings were obtained for national analyses stratified by degree of urbanicity. In 2022, about 7% of prisons were above federal air quality standards, with over 50% of these prisons located in California. Collectively, the contributions of this study in finding health-relevant disparities in outdoor PM2.5 concentrations for prisons across several different metrics may highlight an urgent public health crisis that requires deeper inquiry and interventions from government officials. Decarceration would work to immediately reduce the population of people vulnerable to air pollution in prisons.
Spatial Pattern of Outdoor PM2.5 Air Pollution in U.S. Prison Landscapes from 1998 to 2022.
U. Ovienmhada,Andrew West,Ahmed T Diongue,Danielle R Wood
Published 2026 in Environmental Science and Technology
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- Publication year
2026
- Venue
Environmental Science and Technology
- Publication date
2026-02-03
- Fields of study
Medicine, Environmental Science
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