The map above depicts the locations highlighted in the following story where trace amounts of radiation from Japan have been found in Illinois - Will County and Springfield, Ill.
Reporting from Illinois Public Radio's Sean Crawford used in this report.
Trace amounts of radiation from Japan have shown up in Illinois. But state officials say there's no reason for concern.
Minute levels of radioactive materials have been detected in both northern and central Illinois. The state's Emergency Management Agency says radioactive iodine was found in grass clippings in Will County and in an air sample collected at a lab in Springfield.