CHICAGO—(ENEWSPF)–November 5, 2015 — The U.S. Environmental Protection Agency today released an air quality study that documents elevated concentrations of particulate matter (PM2.5) in ambient air on train platforms at Union Station in Chicago. The concentration of PM2.5 in air on the train platforms was 23 – 96 percent higher than concentrations recorded on nearby streets on the days that monitoring was conducted last summer. The study also found that the highest concentrations of PM2.5 occur during rush hours. Higher particulate concentrations were found at the south platforms than at the north platforms, and particulate levels are highest near locomotives.
