Several factors can influence your radon test results. Keep in mind, however, that although radon gas levels might vary somewhat from one day-to-day, it is unusual for the difference to be significant. If you doubt your test results, you might choose to retest yourself or hire a certified professional. Here are some suggestions to help ensure an accurate reading:
Time of year – Radon levels usually are highest during the heating season. If you are performing a long-term test, choose a time period that will span heating and non-heating seasons.
Test location – The EPA recommends testing for radon in the lowest livable level of your home, where radon levels usually are highest in the home.
Weather patterns – Do not conduct a short-term test during conditions that can influence the test results, such as stormy weather or very high winds.
Test interference – Do not move the test device or open doors and windows during the test, as these actions can result in understated radon levels.
Follow directions – Leave the test in place for the required time period, fill out all required information and mail the device to the laboratory immediately after completing the test.
