radon retest after mitigation 5

https://radonmitigationyorkpazone.almoheet-travel.com/why-radon-mitigation-york-pa-homeowners-trust-starts-with-testing

After installing a radon mitigation system, it's important to retest your home to make sure the levels have actually dropped. Wait at least 90 days, then run a short-term test in the lowest lived-in area. This confirms the fix is working and that your family's exposure is reduced.