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氟进入人体的途径大致有三:空气、饮水和食物。广州市区空气氟浓度为0.002～0.009毫克/立方米,没有超过国家标准(0.02毫克/立方米)。饮水氟的高低是不难测定的。自来水加氟的标准,世界卫生组织定为1ppm(百万分率,即毫克/公斤或毫克/升),广州自来水加氟则控制在0.6～0.8ppm。有些人主张广州自来水不用加氟,这可能是观点不同,不是水氟分析结果的问题。在分析结果上出现了分歧的是食物氟,因为同一地区的食物,这一单位测出食物氟偏高,另一单位测出食物氟偏低,从而对自来水加氟作出不同的结论。
There are basically three ways for fluoride to enter the body: air, water and food. Guangzhou urban air fluoride concentration 0.002 ~ 0.009 mg / m3, did not exceed the national standard (0.02 mg / m3). The level of fluoride drinking water is not difficult to determine. Tap water and fluoride standards, the World Health Organization set at 1ppm (parts per million, mg / kg or mg / l), Guangzhou, water and fluoride control is 0.6 ~ 0.8ppm. Some people claim that there is no need to add fluoride to tap water in Guangzhou. This may not be the result of a water-fluoride analysis because of different opinions. Differences in the results of the analysis were due to food fluoride, as food in the same area measured high levels of food fluoride and low levels of food fluoride in another unit, leading to different conclusions regarding fluoride addition to tap water.