Pennsylvania State University
In 2024, more than 50 million people in the United States lived in counties with no air-quality monitoring, according to a new study from researchers in the Penn State College of Health and Human Development.
Rural counties - especially counties in the Midwest and South - were less likely to have an air-quality monitoring site. Air quality measures are used to estimate people's exposure to air pollution, which makes monitoring a critical public health tool, according to Nelson Roque, assistant professor of human development and family studies and lead author of the study.
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