The Minnesota Pollution Control Agency has issued a health advisory for the Twin Cities and Rochester areas as ozone pollution nears levels considered unhealthy for sensitive groups.

The advisory became effective on Sunday and will last through Monday as mostly-sunny skies, temperatures in the low 90s and light winds from the south continue to enhance ozone formation.

On Sunday, the Air Quality Index was expected to reach 97 in both the Twin Cities and Rochester, with concentrations expected to peak between 1 p.m. and 9 p.m. and fall overnight. Officials expect the ozone concentration will rise to 93 on Monday afternoon.

continue reading MPCA issues air pollution advisory through Monday – KMSP-TV.