January is Radon Action Month, and Longmont Mayor Susie Hidalgo-Fahring has proclaimed January 2026 as “National Radon Action Month” in Longmont. This proclamation emphasizes the importance of testing homes for radon to protect community health.

Radon is an invisible, odorless radioactive gas found naturally in Colorado’s soil and rock. It can seep into homes and build up to dangerous levels. In fact, radon is the leading cause of lung cancer among non-smokers. Find more information about Radon’s health risks on Boulder County’s website.

The only way to know if radon is a problem in your home is to test, even if you have a radon exhaust fan. Radon levels can change over time, so re-testing again every few years is important. Winter is an especially good time because testing works best when windows and doors are kept closed.

Radon testing is free and easy in Longmont:

• Check out a radon detector from the library.
• Order a free mail-in test kit from the State of Colorado.
• Request a free Longmont Sustainable Home appointment, which includes a free mail-in radon test kit.

Find these free testing options and learn what to do if your radon level is high on the City’s website.

Radon is a risk many people don’t realize they have, so protect your health and share this information with at least two neighbors or friends. A quick reminder to test could help protect the people you care about.