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Free Radon Tool

Radon Retest Reminder Calculator

Find out when your home is due for its next radon test based on your last test and recent changes to the house.

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Next radon test

Retest in 6 months

Months until due
6
Tip
Check your manometer monthly; if it reads zero, call for a system repair.

General guidance only. Follow Iowa HHS and EPA testing recommendations.

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Got Questions?

Retest Reminder Calculator FAQs

How often should I retest for radon in Iowa?

If you have a mitigation system, retest at least every two years. Homes without a system should be tested now if they never have been, then retested every two years and after any major change to the home.

Why does a renovation mean I should retest?

Finishing a basement, sealing a house tighter or changing the HVAC system can change air pressure and airflow, which changes how much radon is drawn in from the soil. A new test shows where your home stands now.

My manometer reads zero. What should I do?

A zero reading usually means the fan has stopped moving air. Check that the fan has power, then contact us for a system repair and plan a retest once it is running again.

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