The Autorité de sûreté nucléaire (ASN) publishes the 2020-2024 radon risk national action plan (PAR 4). Building on the National Health-Environment Plan 4 (PNSE), “My environment, my health” (2020-2024), this fourth edition is the fruit of collaboration between ASN, the Ministries for Health, Ecology, Construction and Labour, national experts [1], regional actors [2], radon measurement professionals and associations active in this area.