The U.S. Environmental Protection Agency announced Monday Terre Haute and the rest of Vigo County now meets the National Ambient Air Quality Standard for sulfur dioxide.

Nine counties in Indiana received an "F" for ozone, mostly near major cities like Chicago and by coal plants in the southwest part of the state.

The Environmental Protection Agency says the company emitted higher than normal levels of cadmium for eight days last year.

A state analysis of local wind patterns suggest that the lead released by the mill complex could be blowing north and west toward Chicago or south toward the Indiana community of Chesterton.

The report says Indianapolis and South Bend rank among the 25 worst areas in the country for short-term particles in the air.

Maryland environmental officials filed a petition Wednesday asking the EPA to crack down on 19 coal plants in Indiana, Kentucky, Ohio, Pennsylvania and West Virginia.

A lawsuit could add Indiana to the Ozone Transport Region, a group of 11 states required by the EPA to reduce smog-causing pollutants.

They want a federal judge to force the EPA to add nine more states, including Indiana, to the group required by law to act together to reduce smog in the Northeast.

Five coal plants in Indiana ranked in the top 100 for both toxic and greenhouse gas pollution — more than any other state.

Air quality may become unhealthy for individuals, especially active children, the elderly, and anyone suffering from lung disease or other serious health problems.