The first set of reports all come from the American Lung Association. They publish an annual report, State of the Air, that examines the quality of air in the US and the health impact on the people living in those communities.
The following reports are from PennEnvironment. The link to their page is provided as they regularly publish new reports which might not be listed on this page.
The Health Effects Institute is a nonprofit corporation chartered in 1980 as an independent research organization to provide high-quality, impartial, and relevant science on the health effects of air pollution.