CO
Radon Test Kits in Colorado
CDPHE offers a free radon test kit, one per household per year, and says elevated radon shows up in about one of every two Colorado homes. Denver residents have a separate free order form while supplies last. Arapahoe County has its own free-kit request form. El Paso County sells a $15 short-term Air Chek test in Colorado Springs. Fort Collins sells a $6 short-term kit and a $20 long-term kit at the Senior Center. Boulder County names two sellers and does not list their prices.
Last verified October 1, 2026. Confirm the official page before you travel. Prices and stock change.
State test kit options
Colorado free radon test kit
CDPHE offers a free radon test kit order, one per household per year, and a link to discounted kits.
Who it is for. One free kit per household per year.
Free
Free, one per household per year. CDPHE also links a separate discounted kit order and says store kits often cost about $10 to $50.
Order from the free-kit link on the CDPHE testing page.
Order link published by the agency
CDPHE says radon is found at elevated levels in one out of every two Colorado homes. The department says it does not test your home for you. The discounted kit link on that page goes to https://sosradon.org/test-kits. We did not republish a discounted price because the CDPHE page did not list one.
Denver free radon test kit
Denver says residents can order a free home test kit online while supplies last. The department recommends testing every 2 to 3 years.
Who it is for. Denver residents. Supplies are limited.
Free
Free for Denver residents while supplies last.
Order online from the form linked on the Denver radon page.
Order link published by the agency
This is a mail or online request, not a walk-up counter we verified. Colorado residents outside Denver should use the state program, not this Denver form.
El Paso County Public Health lab kits
El Paso County Public Health sells a short-term Air Chek radon test for $15 at the lab on Garden of the Gods Road in Colorado Springs.
$15
Short-term Air Chek test $15. The same page lists a radon-in-water test at $40 and an alpha-track long-term test at $42.
Purchase at the laboratory. The page does not list counter hours.
El Paso County Public Health Laboratory
1675 W. Garden of the Gods Road
Colorado Springs, CO
The department website lists a general contact number, (719) 578-3199. That number is not labeled as a radon desk, and the lab page does not list hours. Call before you drive. The page also points to CDPHE for discounted kits in January, without listing a January price.
Arapahoe County free radon test kit
Arapahoe County Public Health offers a free radon test kit request form and the phone number 303-795-4584.
Who it is for. The page says homeowners, renters, schools, in-home daycares, and other building occupants should consider testing, and it tells you to request a free kit from the county. It does not say the kit is limited to one city.
Free
The county calls it a free test kit. It does not list a supplies cutoff or a one-per-household rule.
Use the request form linked on the county radon page, or call Arapahoe County Public Health at 303-795-4584.
Order link published by the agency
The page says 48.84% of home radon tests in Arapahoe County are above 4.0 pCi/L and cites the Colorado radon data page. It also calls the county EPA Zone 1. No pickup address is given, so there is no map pin. The footer address is not treated as a kit counter.
Fort Collins discounted radon kits
Fort Collins sells a $6 short-term radon kit and a $20 long-term kit at the Senior Center on Raintree Drive.
Who it is for. The city sells these kits at the Senior Center. If you live outside Fort Collins city limits, the same page tells you to order a kit from CDPHE.
Short-term kits are $6. Long-term kits are $20. Both prices are on the city radon page.
Buy the kit at the Fort Collins Senior Center, 1200 Raintree Drive. The page does not list Senior Center hours. Short-term kits need closed-house conditions and should be mailed as soon as you seal them.
Fort Collins Senior Center
1200 Raintree Drive
Fort Collins, CO 80526
The city says the EPA recommends fixing levels of 4 pCi/L or higher, and that about half of Fort Collins homes tested are at that level. A separate January 2026 Larimer County spotlight described free short-term pickups. That county page was not available when we checked on October 1, 2026, so those free pickups are not listed.
Boulder County short-term kit sellers
Boulder County says two local spots sell short-term radon kits: the ReSource Tool Library in Boulder and Boulder County Extension in Longmont.
The county page does not list a price at either seller. It also says kits can be bought at most hardware stores or at sosradon.org.
Call the seller before you go. The county Air Quality Program is a separate contact, 303-441-1564, at 3450 Broadway, Boulder. That office is not listed as a kit counter.
ReSource Tool Library, Center for ReSource Conservation
6400 Arapahoe Rd.
Boulder, CO 80303
Phone: 303-419-5418
The county says needed radon repairs often cost about the same as other common home repairs, in a range of $800 to $1,200. Air Quality Program hours on the same page are Monday to Friday, 8 a.m. to 4:30 p.m. Those hours are not printed as the sellers' hours. Kit stock was not confirmed, so call first.