Thursday, July 18th

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Heat vapors rise during hands-on fire training at Tyco Fire Product's training facility in Marinette in 2007. The company is currently assessing the extent of contamination from its firefighting foam.(Photo: USA TODAY NETWORK-Wisconsin)

State regulators have ordered Johnson Controls International to broaden its efforts in northeastern Wisconsin to assess the extent of chemical pollution linked to firefighting foam manufactured by one of its business units.

In a July 3 letter from the Department of Natural Resources, the Glendale-based company was directed to test soil and private wells in areas covering more than 3,500 acres of agricultural land in the Marinette area for the presence of perfluorinated chemicals.

The DNR also ordered Johnson Controls to start sampling the Menominee and Peshtigo rivers for evidence of the chemicals. 

Separately, in a July 2 letter, the DNR identified ChemDesign Products of Marinette as an additional responsible party in the pollution case.