High Radon Result? What to Do Next

Summary of guidance from Utah DEQ’s “High radon levels? What’s next” and Radon pages. Read the originals for full details.

1. Confirm with a follow-up test

• If a short-term test is 4 pCi/L or higher, take a follow-up test to be sure.
• Use a long-term test for a better picture of your year-round average, or a second short-term test if you need results quickly.
• If your first short-term result is more than twice the 4 pCi/L action level, take a second short-term test immediately.
• DEQ’s main radon page suggests considering a long-term test for results between 4 and 6 pCi/L.

2. Decide whether to fix your home

• After a long-term follow-up: fix your home if the result is 4 pCi/L or more.
• After a second short-term test: consider fixing your home if the average of both tests is 4 pCi/L or higher.

3. Hire a qualified mitigator

• Get three bids, and ask any contractor about their radon credentials. DEQ points to the National Radon Proficiency Program list.
• Get a signed contract that guarantees radon levels at or below 4 pCi/L. DEQ notes most homes can be reduced to 2 pCi/L or below.

4. Test again and keep checking

• Retest once the system has been running for at least a full day.
• Check the manometer (pressure gauge) regularly to confirm the fan is working.
• DEQ recommends retesting every two years, even with a system installed.

Below 4 pCi/L? DEQ suggests retesting every two to five years (source).

Need a follow-up test? See where to get a follow-up test kit.

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