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Does barometric pressure change radon levels?
Saturday, January 25, 2020
Barometric pressure is simply the weight of the air in the atmosphere pressing down on the earth. A decrease in barometric pressure, from an oncoming thunderstorm for example, will immediately increase the flow of radon gas from the ground. It is one of the factors that causes the normal variations that occur hour-to-hour and day-to-day in the radon level in home. But, because a radon test for a real estate transaction is typically a short-term two-day test and it can sometimes radically skew the results, testing should not be done when a storm is approaching or a low-pressure weather front is advancing through the area.
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