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→Measuring and Reducing Radon Levels in your Home
A long-term measurement is preferred, ideally for three months or more. Radon levels change during the day and from season to season, making shorter measurements less reliable.
The level of radon in your home should be compared to your [[Radon For Governments and Employers#Radon Recommendations for Authorities|national reference level]], usually set somewhere in the range 100 to 300 [[Radon: Units of Measure|Bq/m<sup>3</sup>]].
