WATERVILLE — Online registration is open for the 2015 Indoor Insanity 5K event set for Sunday, Jan. 18, 2015, at Colby College, according to a news release from Maine Indoor Air. Runners and walkers of all ages and abilities are welcome. Free T-shirts are available for registrations received by Jan. 7. Event day registration for all heats opens at 7 a.m., with the first heat starting at 8 a.m. The event ends by 11 a.m.

Proceeds be used to install radon gas mitigation systems in low-income housing where radon gas has been detected at dangerous levels. The EPA lists radon gas as the leading cause of lung cancer after smoking.

For more information and to register, visit maineindoorair.org and click on events. Snow date is Jan. 25.

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