US EPA
     www.epa.gov/radon

Air Check:  Supplier of discounted radon tests for Minnesota residents.
     www.radon.com/sub/mn/

American Association of Radon Scientists and Technologists (AARST)
     www.aarst.org

The Minnesota Radon Project at St. John’s University
     www.csbsju.edu/MNradon

Minnesota Department of Health
     www.health.state.mn.us/divs/eh/indoorair/radon

Training for testing and mitigation contractors by Midwest Universities Radon Consortium (MURC)
     www.cce.umn.edu/series/radon

NEHA certification program for testing and mitigation contractors
     www.radongas.org