The Chicago skyline and Lake Michigan are seen in this aerial photograph over Chicago, taken in May 30. A major reason for Sheboygan's poor showing is air pollution from Chicago and elsewhere moving north over Lake Michigan, experts say.
Sheboygan County could shed its status of having the worst air quality in the state thanks to a new ozone monitor that will gauge whether the county's air quality improves farther away from Lake Michigan.
For years, state and federal regulators have conceded that the county's high ozone levels are driven by pollution drifting northward along the lake from Chicago and other metro areas to the south.
All lakeshore counties are affected, but Sheboygan is hit hardest because it juts farther out into the lake than counties to the south, experts say. ...