Testing is the only way to know if your home has elevated radon levels.

Short-term tests:

• Usually 2–7 days
• Ideal for initial screening
• Use charcoal canisters or digital test kits
• Best placed in basements or the lowest lived-in level

Long-term tests:

• 90+ days
• Provide a better average of seasonal fluctuations
• Strongly recommended before investing in mitigation

When to test:

• Before buying or selling a home
• After any major renovation
• Every 2–5 years, especially if you live in a radon-prone area