The only way to know if a house has radon gas, is to have the house checked for the gas. In order to detect radon along with other radioactive material, a certified radiation surveyor will set up (monitor) an apparatus with a continuous fan that will increase the amount of indoor air when present. You may want to check out radon testing before buying a house for more. Radon kits are usually placed in the lowest liveable area of the home (basement), away from draughts, in a closed house alongside a location such as in a closed garage (windows and doors), coupled with an accurate reading of the radon levels in order to get an accurate reading for the common household
The EPA recommends that the house be assessed if the radon level is above a specific level of four picocuries per litre. Radon gas is harmful, so if the radiation levels are less than 4 picoCuries per litre (it is recommended to get these levels down further still), the radon gas can still be harmful. I have recently been asked about whether radon testing should occur in daycare centres. I’ve learned within the past year and within the past two years there’s been a call to the EPA about daycare on the ground levels of a building or on basement levels of a building, where the primary school is. And the building must be licenced with a radon level test. Additionally, there’s a requirement to test every two years thereafter. If the test shows that there is a level of radioactive substance beyond the 4 pcils that is within a room, that a plan must be used to reduce radioactivity, before a licence is allowed to issue or it can be renewed. In addition to air quality legislation, legislators are also working on legislation that would require the state to test nearby schools for radon and open-air gathering places for radon testing.