摘要目的:掌握内蒙古自治区居民饮用水氟含量分布情况，为制定饮水型地方性氟中毒精细化防控措施提供科学依据。方法:2017年1月至2019年12月，在内蒙古自治区12个盟市103个旗县的所有自然村开展水氟调查工作，按不同供水方式（工程供水、理化改水、分散供水）采集居民饮用水水样。水氟检测采用离子选择电极法，依据《生活饮用水卫生标准》（GB 5749-2006）判定水氟是否超标。结果:在全区12个盟市103个旗县的36 625个自然村开展调查，其中，工程供水村24 682个，占67.39%；理化改水村2 610个，占7.13%；分散供水村9 333个，占25.48%。工程供水村、理化改水村、分散供水村水氟中位数分别为0.62、0.23、0.52 mg/L，不同供水方式间比较差异有统计学意义（ H = 2 809.95， P < 0.001）；水氟合格率分别为96.47%（23 810/24 682）、99.73%（2 603/2 610）、96.37%（8 994/9 333），不同供水方式间比较差异有统计学意义（χ 2 = 132.74， P < 0.001）。全区12个盟市均有水氟超标村，其中，赤峰市和鄂尔多斯市水氟超标村数较多（479、282个）。 结论:内蒙古自治区12个盟市均有水氟超标村，后续需进一步督促相关部门对水氟超标村进行规划管理。

abstractsObjective:To learn about the distribution of fluoride content in drinking water of residents in Inner Mongolia Autonomous Region, so as to provide scientific basis for formulation of refined prevention and control measures for drinking-water-type endemic fluorosis.Methods:From January 2017 to December 2019, water fluoride surveys were carried out in all natural villages of 103 banners (counties) in 12 leagues (cities) of Inner Mongolia Autonomous Region, and drinking water samples of residents were collected according to different water supply methods (engineering water supply, physical and chemical water improvement, and decentralized water supply). The ion selective electrode method was used for water fluoride detection, and whether the water fluoride exceeded the standard was determined according to the "Standards for Drinking Water Quality" (GB 5749-2006).Results:The survey was carried out in 36 625 natural villages in 103 banners (counties) of 12 leagues (cities) in the region, among which 24 682 were engineering water supply villages, accounting for 67.39%; 2 610 were physical and chemical water improvement villages, accounting for 7.13%; and 9 333 were decentralized water supply villages, accounting for 25.48%. The median values of water fluoride in the engineering water supply villages, the physical and chemical water improvement villages and the decentralized water supply villages were 0.62, 0.23, and 0.52 mg/L, respectively, and the difference between different water supply methods was statistically significant ( H = 2 809.95, P < 0.001); the qualified rates of water fluoride were 96.47% (23 810/24 682), 99.73% (2 603/2 610) and 96.37% (8 994/9 333), respectively, and there was significant difference between different water supply methods (χ 2 = 132.74, P < 0.001). All the 12 leagues (cities) in the region had villages with water fluoride exceeding the standard, among which Chifeng City and Ordos City had more villages with water fluoride exceeding the standard (479, 282). Conclusions:All the 12 leagues (cities) in Inner Mongolia Autonomous Region have villages with water fluoride exceeding the standard. It is necessary to urge relevant departments to carry out planning and management of villages with water fluoride exceeding the standard.