Colorado Radon Gas Disclosure
Required Disclosure – C.R.S. § 38-12-803
Under C.R.S. § 38-12-803, ALL landlords in Colorado MUST provide this radon disclosure to tenants BEFORE they sign a lease. Failure to provide this disclosure can result in the tenant being able to void the lease and may expose the landlord to liability. Colorado has some of the highest radon levels in the nation.
🏠 Property Information
⚠️ Required Statutory Warning (C.R.S. § 38-12-803)
RADON GAS WARNING – REQUIRED BY COLORADO LAW
WARNING: RADON GAS
Radon gas is a naturally occurring radioactive gas that, when it has accumulated in a building in sufficient quantities, may present health risks to persons who are exposed to it over time. Levels of radon that exceed federal and state guidelines have been found in buildings in Colorado. Additional information regarding radon and radon testing may be obtained from your county health department.
The Colorado Department of Public Health and Environment recommends that all residential property be tested for radon prior to purchase or occupancy.
The landlord of this property is required by Colorado law to provide the tenant with this disclosure and any known radon test results for the property.
EPA Action Level: The EPA recommends taking action to reduce radon levels if testing shows 4.0 pCi/L (picocuries per liter) or higher. Colorado has elevated radon levels statewide – testing is strongly recommended.
🔬 Radon Testing Information
🛠️ Radon Mitigation
📄 CDPHE Radon Brochure
Required: The Colorado Department of Public Health and Environment (CDPHE) provides a radon information brochure that should be provided to tenants. You can download it at: cdphe.colorado.gov/radon
👔 Landlord Disclosure & Certification
Landlord/Agent Signature
👤 Tenant Acknowledgment
Tenant Signature(s)
Colorado Radon Gas Disclosure – Required by Law
Colorado law (C.R.S. § 38-12-803) requires ALL landlords to provide a radon gas disclosure to prospective tenants BEFORE they sign a lease agreement. Colorado has some of the highest radon levels in the United States, making this disclosure critically important for tenant health and safety.
What is Radon?
Radon is a naturally occurring radioactive gas that comes from the decay of uranium in soil and rock. It’s invisible, odorless, and can seep into buildings through cracks in foundations, floors, and walls. Long-term exposure to elevated radon levels is the second leading cause of lung cancer in the United States after smoking.
Why is Colorado High-Risk?
Colorado has elevated radon levels due to its geology. The EPA estimates that approximately 50% of Colorado homes have radon levels above the recommended action level. Every county in Colorado has homes with elevated radon.
| Radon Level (pCi/L) | Risk Level | Recommended Action |
|---|---|---|
| Less than 2.0 | Low | No action needed, retest every 2-5 years |
| 2.0 – 3.9 | Moderate | Consider mitigation, especially if levels are closer to 4.0 |
| 4.0 or higher | High (EPA Action Level) | Mitigation strongly recommended |
What Must the Disclosure Include?
- Statutory Warning: The exact language required by C.R.S. § 38-12-803
- Known Test Results: Any radon test results the landlord has
- Mitigation Information: Any known radon mitigation systems
- CDPHE Brochure: Reference to or copy of the state radon brochure
- Signatures: Both landlord and tenant must sign
Tenant Rights
Tenants in Colorado have the right to:
- Receive this disclosure before signing a lease
- Conduct their own radon testing at their expense
- Request radon test results from the landlord
- Potentially void a lease if disclosure wasn’t provided
Radon Testing Resources
- CDPHE Radon Program: cdphe.colorado.gov/radon
- Free/Low-Cost Test Kits: Available through many county health departments
- Certified Testers: NRPP or NRSB certified professionals
⚠️ Legal Disclaimer
This form is provided for informational purposes. Landlords should ensure they understand their obligations under C.R.S. § 38-12-803. If you have questions about radon disclosure requirements or liability, consult with a Colorado attorney. If you’re concerned about radon levels, consult with a certified radon professional.
