2017年宁夏回族自治区居民生活饮用水水碘含量调查结果分析

Analysis of investigation results of iodine content of drinking water of residents in Ningxia Hui Autonomous Region in 2017

目的了解宁夏回族自治区(简称宁夏)居民生活饮用水水碘含量,为推进科学补碘提供依据。方法2017年,对宁夏的22个县(市、区)以乡(镇、街道办事处)为单位开展调查。按照统一集中供水、混合供水、分散供水方式采集居民生活饮用水水样并检测水碘含量。对于调查中发现水碘中位数>10μg/L的乡,再以行政村(居委会)为单位,采集水样并检测水碘含量。结果共对242个乡(镇、街道办事处)进行了乡级水碘调查,共采集水源水水样1048份,水碘中位数为6.6μg/L,范围为0.0~97.8μg/L。水碘中位数>10μg/L的乡有75个,进行行政村级水碘调查,共采集水源水样1169份,水碘中位数为14.5μg/L,范围为0.0~97.4μg/L。乡级集中供水、混合供水、分散供水水碘中位数分别是6.9、6.8、4.5μg/L,差异有统计学意义(χ^2=7.08,P<0.05);行政村级集中供水、混合供水、分散供水水碘中位数分别是15.8、8.4、11.6μg/L,差异有统计学意义(χ^2=35.23,P<0.05)。结论宁夏居民生活饮用水水碘含量偏低,与宁夏处于外环境缺碘这一事实相吻合。

Objective To understand the iodine content of drinking water in Ningxia,and provide a basis for promoting scientific iodine supplementation.Methods In 2017,22 counties(cities,districts)of Ningxia Hui Autonomous Region were surveyed by township(town,street office)as the unit.Water samples were collected and iodine content was detected according to the unified centralized water supply,mixed water supply and all the scattered water supply methods.Among them,the investigation at township(town and street office)level found that the median of iodine in water was>10μg/L,and then the water samples were collected in administrative villages(neighborhood committees)and the content of iodine in water was detected.Results A total of 242 townships(town,street office)were surveyed at the township level water iodine,and a total of 1048 water samples were collected,the median water iodine was 6.6μg/L,the range was 0.0-97.8μg/L.There were 75 townships with a median water iodine>10μg/L,and an administrative village level water iodine survey was conducted.A total of 1169 water samples were collected,the median water iodine was 14.5μg/L,and the range was 0.0-97.4μg/L.The median water iodine at the township level,unified centralized water supply,mixed water supply,and all the scattered water supply was 6.9,6.8,and 4.5μg/L,respectively.The difference was statistically significant(χ^2=7.08,P<0.05).The median water iodine at the administrative village level,unified centralized water supply,mixed water supply,and all the scattered water supply was 15.8,8.4,and 11.6μg/L,respectively.The difference was statistically significant(χ^2=35.23,P<0.05).Conclusion The iodine content of drinking water in Ningxia residents is low,which is consistent with the fact that Ningxia is in the iodine deficient area.