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为了了解辽宁省地区以地下水为水源的自来水中氡浓度水平，在９２个布点，用ＺＹＷ－８５０１型测氡仪和闪烁射气法测量了自来水末梢水样的氡浓度。调查结果表明，辽宁省以地下水为水源的自来水中氡浓度分布基本符合正态分布。氡浓度范围为０．８６～８５．６２ｋＢｑ·ｍ－３，中位数（Ｍ）＝２６．９３ｋＢｑ·ｍ－３，均值ｘ＝２６．９７ｋＢｑ·ｍ－３，变异系数＝６１．９％。辽宁省地下水源中５０％的点位水中氡浓度处于１６．００～４０．００ｋＢｑ·ｍ－３范围之内。近１０％点位水中氡浓度高于５０ｋＢｇ·ｍ－３。辽宁省以地下水为水源的自来水中氡浓度与国内外值相比，属中等水平
In order to understand the radon concentration in groundwater tap water in Liaoning Province, the radon concentration in tap water samples was measured at ZYW-8501 radon detector and scintillation gas detector at 92 locations. The survey results show that the concentration of radon in tap water with groundwater as a source in Liaoning Province basically meets the normal distribution. Radon concentration ranged from 0.86 to 85.62kBq · m-3, median (M) = 26.93kBq · m-3, mean value x = 26.97kBq · m-3, coefficient of variation = 61.9%. Concentrations of radon in 50% of the groundwater sources in Liaoning Province are within the range of 16.00-40.00 kBq-m-3. Nearly 10% of the spot radon concentration higher than 50kBg · m-3. The radon concentration in tap water with groundwater as the source in Liaoning Province is moderate compared with that at home and abroad