... See, for example, Moolgavkar, Air Pollution and Daily Mortality in Three U.S. Counties,” and Hoek et al., “Daily Mortality and Air Pollution in the Netherlands.” 80 Moolgavkar, Air Pollution ... average these three readings. A region exceeds the standard if the result is greater than 65 µg/m3 for at least one monitoring location in the region. (EPA, “National Ambient Air Quality Standards ... year, and average these three readings. A region exceeds the standard if the result is greater than 150 µg/m3 for at least one monitoring location in the region. (EPA, “National Ambient Air Quality...