Radon is a naturally occurring, radioactive gas formed by the breakdown of uranium. Radon is tasteless, colorless, and odorless, and is found in many types of soil and rocks. It can enter homes through cracks in foundations, sump pump crocks, crawl spaces, or other openings. 

Radon is present in outdoor air, but is diluted to such low levels that it is usually not a concern. However, inside an enclosed space (such as a home), radon can build up to dangerous levels. Any home can have a radon problem - new and old homes, well-sealed and drafty homes, and homes with or without basements. The only way to know your home's radon level is to test!

Radon Test Kits

Order a radon kit online 

Do-it-yourself radon kits are available to order online for $9.95. These are the same type of kits distributed at the offices listed below.

Purchase a radon test kit in person 

Do-it-yourself radon test kits are available for $10 at the following locations. You do not have to be a Washtenaw County resident to purchase a kit, and you can use the kit to test a home that is not in Washtenaw County.

  • Washtenaw County Environmental Health Division between the hours of 8:30 a.m. and 5 p.m., Monday through Friday. The office is located in the Western Washtenaw County Service Center at 705 N Zeeb Road, Ann Arbor, MI 48103. Email Angela Parsons or call 734-222-3869 with questions.
  • Ypsilanti Township Residential Services Department between the hours of 8:30 a.m. and 4:30 p.m., Monday through Friday (closed for lunch Noon to 1 p.m. daily). The office is located in the Tilden R. Stumbo Civic Center at 7200 S Huron River Drive, Ypsilanti, MI 48197. Email Carly Willis or call 734-544-3512 with questions.

Please note: 

You will receive results from our do-it-yourself radon test kits in about 10 days to two weeks. You can visit www.radon.com to look up your results if you have the test kit’s serial number. We cannot guarantee results in a specific period of time.

If you need radon test results quickly because you are buying or selling a home and the closing date is near, please hire a private company to use a continuous radon monitor (CRM) to test. These computerized devices can usually provide results in a little over 48 hours.