Colorado Radon Disclosure

Colorado is one of the highest-radon states in the country, and state law requires that a radon disclosure and informational brochure be provided in connection with residential real property transactions, including many residential leases.

What is radon?

Radon is a naturally occurring, colorless, odorless radioactive gas produced by the breakdown of uranium in soil and rock. It can enter homes through foundation cracks, sump pits, and other openings and can accumulate to elevated levels indoors. According to the U.S. Environmental Protection Agency, prolonged exposure to elevated radon is the second leading cause of lung cancer in the United States and the leading cause among people who have never smoked.

Colorado's disclosure requirement

Under Colorado law, before or at the time a residential lease is signed, owners are generally required to provide the tenant with a written radon disclosure and a copy of the state's radon informational brochure, along with any records of prior radon testing or mitigation for the property, if such records exist. Handled PM provides this disclosure to tenants of the homes we manage as part of the leasing process.

Testing and mitigation

Radon levels vary home to home, even between neighbors. The EPA and the Colorado Department of Public Health & Environment recommend testing, and inexpensive test kits are widely available. When elevated levels are found, radon mitigation systems are a well-established, effective solution. Owners who work with Handled PM can ask us to coordinate testing or mitigation with qualified local vendors as part of our full-service management.

Official Colorado radon resources

For the official state radon brochure, current guidance, and testing resources, visit the Colorado Department of Public Health & Environment radon program:

Colorado Department of Public Health & Environment — Radon (cdphe.colorado.gov/radon)

For federal information, see the EPA radon program:

U.S. EPA — Radon (epa.gov/radon)

This page is provided for general informational purposes to satisfy awareness of Colorado's radon disclosure requirement and is not legal advice. Specific disclosure obligations depend on the transaction and current statute; consult the CDPHE resources above or a qualified Colorado professional for details.