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Vermont Provides Radon Contribution Calculator

by Margaret Henderson

One in eight Vermont homes has levels of radon in excess of the 4pCi/L USEPA recommended action level. The average level in homes is 2.5 pCi/L.

In addition to presenting information on radon in air, the Vermont Department of Health provides information on radon in water because the contribution to indoor air can occur when taking showers, or running the dishwasher or washing machine.

To illustrate how radon in water may contribute to radon exposure, the department provides a “Radon Contribution Calculator.” This spreadsheet calculator allows the user to enter the test results for radon concentration in air and radon concentration in water. The calculator then presents:
• Contribution of radon in water to radon in air
• Outdoor radon concentration
• Contribution of soil gas to radon in air

A text box explains results in terms of health risk. The purpose of the calculator is to give estimates that assist in making decisions in working with a licensed mitigator to remediate radon problems.

To use the calculator, visit http://www.healthvermont.gov/radon. See the section called “What does the radon test result mean?” Then download the Radon Contribution Calculator.

For more information about radon in Vermont, contact:
Radon Program radon@vermont.gov
108 Cherry Street
P.O. Box 70 – Drawer 30
Burlington, VT 05402-0070
Phone: 802-863-7220 or
800-439-8550 (toll-free in Vermont)
Fax: 802-863-7483