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Minnesota State Health Department

Mitigation Reduces Radon Gas in Dodge County Courthouse

Several months ago, Dodge County staff members discovered that some rooms in the old courthouse basement tested positive for radon gas.

There are no standards for the allowable amount of the toxic gas for non-residential buildings in Minnesota, but county commissioners decided to proceed using the strict limits required for residences. The Environmental Protection Agency recommends mitigation if more than 4 picocuries are recorded during radon testing in homes.

(A picocurie is a unit for measuring radioactivity equal to one trillionth of a curie. The curie is based on the observed decay rate of about one gram of radium.)

Radon gas is the second-leading cause of lung cancer in the United States.

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