调查结果，不同水系的水源水总α比活度井水＞河水＞自来水、沙滤水＞矿泉水。自来水中的总α、总β比活度低于水源水。 According to the survey results, the water source water in different water systems has the highest specific activity ratio of well water> river water> tap water, sand filtration water> mineral water. The total α in tap water is lower than the source water in total β specific activity.