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radon in a persons lungs

Radon is an odorless, radioactive gas that results from the natural decay  of uranium. Uranium is found in rock, soil, and water across the world. Radon typically moves up through the ground to the air above and into your home through cracks and other holes in your home’s foundation.

Radon gas decays into radioactive particles that can get trapped in your lungs when you breathe. As they break down, these particles release small bursts of energy that can damage lung tissue and lead to lung cancer over the course of your lifetime.

Nearly 46% of all homes in Colorado are estimated to have elevated radon levels. The only way to know the radon level of your home is to test. It is inexpensive and takes only a few minutes of your time.

Short-term radon test kits are available at the health department, for FREE, while supplies last.  One per household, and must be a Weld County resident.

Test kits may be picked up any time from 8:00 a.m. -5:00 p.m., Monday - Friday, at either of these two locations:

  • 1555 North 17th Avenue, Greeley, CO 80631
  • 4209 County Road 24 1/2, Longmont, CO 80504 (I-25 and Exit 240)

If you are not able to pick up a test kit, you may also request one online, by visiting


Environmental Health Services

1555 North 17th Avenue 
Greeley, CO 80631
Monday - Friday 8:00 a.m. - 5:00 p.m. 
Phone: (970) 304-6415
Fax: (970) 304-6411

Gabrielle Vergara

Phone: (970) 400-2226