Air pollution highs and lows

Fine particles — toxic specks that research has linked to a variety of ills, including shorter lifespans — aren’t evenly concentrated across the country. Vanderburgh in southwest Indiana has higher levels than nearly 90 percent of U.S. counties with air-monitoring data for 2013 to 2015, according to average annual figures from the U.S. Environmental Protection Agency. Most of the country, colored in gray in the map above, does not have monitoring data for particles. But efforts to estimate particles for all counties using satellite data have shown similar trends for southwest Indiana.

Eric Devlin/weather.com