The Hamilton County Department of Environmental Services has issued a smog alert for Thursday, July 7 for Butler, Clermont, Hamilton and Warren counties in Ohio and Boone, Campbell and Kenton counties in Kentucky.
HCDOES expects to see levels of particulate matter in the "unhealthy for sensitive groups" range on the Air Quality Index.
Smog is a term used to describe air pollution that is a result of the interaction of sunlight with certain chemicals in the atmosphere. The two primary pollutants in smog are ground-level ozone (O3) and particulate matter (PM).
These pollutants come from a variety of sources, including: