As tenants in Colorado, it’s crucial to be aware of new legislation that impacts our living conditions and safety. The Colorado Senate Bill 23-206, effective from August 7, 2023, brings significant changes to how radon information is handled in residential properties. Let’s break down what this bill means for you as a tenant.

What is Radon?

Firstly, it’s important to understand what radon is. Radon is a naturally occurring, radioactive gas that can be harmful to health, particularly if it accumulates in indoor environments like homes.

Key Aspects of the Bill

  1. Radon Awareness in Real Estate:
    • The bill mandates that any contract for selling residential real estate must include a warning about the dangers of radon and the need for radon testing.
    • If you’re renting, your landlord is required to provide you with information about any known radon levels in the property and any past radon mitigation efforts.
  2. Your Rights as a Tenant:
    • You now have the right to know about the radon levels in your home. This transparency can help you make informed decisions about your living space.
    • If your landlord fails to disclose this information or address high radon levels, you can void your lease. However, from January 1, 2026, this will only apply to leases longer than a year.
  3. Brochures and Public Health Information:
    • Landlords and sellers must also provide a current brochure published by the Department of Public Health and Environment, which offers advice about radon in real estate transactions.

Implications for Tenants

  • Increased Safety and Health Awareness:
    • This bill empowers you with knowledge about radon risks in your home, contributing to a safer and healthier living environment.
  • Empowerment in Lease Agreements:
    • As a tenant, you have more power to ensure your home is safe from radon exposure. If landlords don’t comply with these new rules, you have legal grounds to terminate your lease.
  • Collaboration with Landlords:
    • Encourage open communication with your landlord about radon testing and mitigation. This bill facilitates a collaborative approach to ensure safe living conditions.


Colorado Senate Bill 23-206 is a significant step towards better public health and safety in residential properties. As tenants, it’s essential to be aware of these changes and understand your rights and the responsibilities of your landlords. Stay informed, stay safe, and ensure your home is a healthy place to live.