The Penn State team instead put together a measurement system including the more-broad smoke forecasts from NOAA and hourly data from on-the-ground sensors.
Air quality reached red, purple and maroon levels in different parts of Pennsylvania on Thursday.
The new State of the Air report from the American Lung Association finds the Harrisburg area worsened in daily particle pollution for the third straight year.
Places like Harrisburg are planting more trees to improve the urban canopy. But if roots of trees buckle a sidewalk, for example, a homeowner is on the hook — which leads some to resist.
By Adriana Delagarza 