🏔 Colorado Radon Gas Disclosure
Required Radon Disclosure for Colorado Rental Properties
HIGH-RISK STATE — DISCLOSURE REQUIRED: Colorado has some of the highest average indoor radon levels in the United States. Radon is the second-leading cause of lung cancer in the US. Colorado law requires landlords to disclose known radon test results to tenants. This form documents your disclosure of radon information and test results for the rental property.
🏠 Rental Property
🔌 Radon Test Results
👤 Tenant Information
👔 Landlord Information
✍ Tenant Acknowledgment
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🔍 Order Tenant Screening →Colorado Radon Gas Disclosure — Complete Guide
Colorado is consistently ranked among the states with the highest indoor radon levels in the nation. Colorado landlords are required to disclose known radon test results to prospective tenants. Radon is a colorless, odorless radioactive gas that forms naturally from uranium decay in soil and rock, and is the second-leading cause of lung cancer in the United States.
Colorado's Radon Problem
- Colorado average indoor radon level: approximately 6.3 pCi/L
- EPA action level: 4.0 pCi/L — Colorado average is 57% above this threshold
- More than 50% of Colorado homes test above the EPA action level
- Higher-risk areas include the Front Range, Colorado Springs, and mountain communities
What the Disclosure Must Cover
- Any known radon test results for the property
- Whether a radon mitigation system is installed
- Date and method of any testing performed
Mitigation Reduces Risk Significantly
A properly installed sub-slab depressurization (SSD) system typically reduces radon levels by 80-99%. If your property tests above 4.0 pCi/L, mitigation costs are typically $800–$2,500 for a single-family home — a worthwhile investment in tenant health and landlord liability protection.
⚖ Legal Disclaimer
This form is for informational purposes only. For current radon disclosure requirements and testing resources, visit the Colorado Department of Public Health and Environment at cdphe.colorado.gov. Consult a qualified attorney for advice specific to your situation.
