Radon Map

This map shows a prediction of the number of homes in a given grid square that over the national Reference Level. Grid squares in which the predicted percentage of homes is 10 % or greater are called High Radon Areas.本地图呈现了给定网格区块（grid square）内，氡浓度超出国家参考水平（national Reference Level）的住宅数量的预测结果。其中，此类住宅占比预测值达到10%及以上的网格区块，被定义为高氡浓度区域（High Radon Areas）。