Washington Renters: Radon Testing and Landlord Obligations

As a renter in Washington, your health and safety are protected by state law. One important aspect of living in a safe home involves the presence of radon—a naturally occurring, radioactive gas that can pose serious health risks. This article explains current Washington rules for radon testing in rental properties, what landlords are required (and not required) to do, and how you, as a renter, can take action if you have concerns.

Understanding Radon and Its Impact on Rental Housing

Radon is a colorless, odorless gas found naturally in soil and rock. Long-term exposure to high levels of radon can increase your risk of lung cancer. The Environmental Protection Agency (EPA) recommends testing all homes for radon, but every state has different legal requirements.

Are Landlords in Washington Legally Required to Test for Radon?

As of 2024, Washington State does not have a law that requires landlords to test rental properties for radon. Unlike some states, Washington’s residential landlord-tenant laws do not specifically mention radon gas. However, all rental homes must meet general health and safety standards under the Washington Residential Landlord-Tenant Act.[1]

  • Landlords must provide homes that are "fit for human habitation."[2]
  • If you discover or suspect high radon levels, it’s best to talk with your landlord about testing and mitigation options.
  • There is no official state form or notice specifically for radon testing in rentals, but written communication is important.

Who Oversees Tenant-Landlord Disputes?

If you have health and safety concerns—including radon—you may seek help from the Washington State Attorney General’s Office Landlord-Tenant Division, which provides information and resources for renters. Formal legal disputes are settled in Washington State District or Superior Court.

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What to Do if You Suspect Radon in Your Rental Home

If you’re worried about radon, there are steps you can take—even though testing isn’t legally required for landlords. Here’s how you can protect yourself:

  • Request Radon Testing: Politely contact your landlord in writing to ask if the property has been tested, and request a test if not.
  • DIY Testing: Purchase a radon test kit from a hardware store or find a licensed radon tester. If you discover high levels (4 pCi/L or greater), share results with your landlord.
  • Document Everything: Keep a written record of tests, communications, and any symptoms or concerns. This may be helpful if you need to take further action.
Even without a specific radon law, your landlord must address hazardous conditions if radon is found at dangerous levels. Prompt communication is key.

Official Forms and Practical Examples

  • Landlord Repair Request (None specific to radon): Use a general written repair request. For example, "I have conducted a radon test that shows high levels. I am requesting mitigation or repairs as soon as possible." No official state form exists, but you may download the Sample Request for Repairs from the Attorney General and customize it for radon issues.

Keep in mind: Always send your request via a method you can track (certified mail or email) and keep a copy for your records.

Relevant Legislation for Washington State Renters

While this law does not specifically mention radon, it requires that all rental homes are kept fit for human habitation and free from hazardous conditions.

Frequently Asked Questions About Radon and Rentals in Washington

  1. Are Washington landlords required to test or disclose radon?
    No. There is currently no Washington law requiring landlords to test rentals for radon or to disclose radon levels to tenants.
  2. Can I test my rental home for radon myself?
    Yes, renters have the right to test their own homes. Consider informing your landlord before testing and sharing results after you receive them.
  3. What happens if high radon levels are found in my rental?
    If you discover high radon, tell your landlord in writing. While not required by law to mitigate radon specifically, landlords must address conditions that could endanger health or safety.
  4. Who can help if my landlord refuses to address safety issues?
    The Attorney General’s Landlord-Tenant Division can provide information. Legal disputes are handled by Washington State Courts.
  5. Is there a government form for requesting radon repairs?
    No. Use a general written repair request and keep a copy. You can adjust the Sample Request for Repairs form as needed.

Key Takeaways for Washington Renters

  • Washington does not require landlords to test rentals for radon or disclose radon results.
  • All rental homes must meet basic health and safety standards under state law.
  • Take action if you suspect radon: test, inform your landlord, and document everything.

Staying informed about your renter rights can help you protect your health and address concerns with confidence.

Need Help? Resources for Renters


  1. Washington Residential Landlord-Tenant Act (RCW 59.18)
  2. Washington State Department of Health – Radon
Bob Jones
Bob Jones

Editor & Researcher, Tenant Rights USA

Bob writes and reviews tenant law content for various regions. They’re passionate about housing justice and simplifying legal protections for renters everywhere.