Saliba Nemre Adas, Moimaz Suzely Adas Saliba, Tiano Ana Valéria Pagliari
UNESP - São Paulo State University, Araçatuba Dental School, Araçatuba, São Paulo, Brazil.
J Appl Oral Sci. 2006 Oct;14(5):346-50. doi: 10.1590/s1678-77572006000500009.
It may be difficult for small and medium cities to obtain information about the fluoride content of public water, because of the lack of equipments and technicians. This study aimed to analyze the fluoride levels of the water supplied by the public treatment stations of 40 cities situated in the northwest region of São Paulo State, during a period of 6 months, to verify if fluoridation occurs in a continuous manner and if the fluoride levels are within the recommended. Maps of the water distribution system were obtained from the water treatment companies and utilized to randomize the addresses of the collection sites, so that they included all regions with treated water sources. One water sample by month was collected and analyzed in duplicate using an ion-specific-electrode. Samples with 0.6 to 0.8 mgF/L were considered acceptable. In the 38 cities that regularly provided the samples in the 6 months of the study, water from 144 collection sites was collected and a total of 864 samples were analyzed, of which 61.81 percent were classified as unacceptable. It was observed that 33 cities performed fluoridation but in 78.79 percent of these cities there were variations in the fluoride level among the sites and in the same site during the period of study. One can conclude that most of these cities do not control the fluoride levels in the public water, since fluoridation occurs in a discontinuous manner and in most of the situations not within the recommended concentrations.
由于缺乏设备和技术人员，中小城市可能难以获取公共供水的氟含量信息。本研究旨在分析圣保罗州西北部40个城市的公共处理站在6个月期间供应的水的氟含量水平，以核实是否持续进行了氟化处理以及氟含量是否在推荐范围内。从水处理公司获取了配水系统地图，并用于随机确定采样地点的地址，以便涵盖所有有经处理水源的地区。每月采集一个水样，并使用离子特异性电极进行双份分析。氟含量在0.6至0.8mgF/L的样本被视为可接受。在研究的6个月中定期提供样本的38个城市，共采集了来自144个采样地点的水，总共分析了864个样本，其中61.81%被归类为不可接受。观察到33个城市进行了氟化处理，但在这些城市中，78.79%的城市在研究期间各采样点以及同一采样点的氟含量存在差异。可以得出结论，这些城市中的大多数没有控制公共供水中的氟含量，因为氟化处理是不连续进行的，而且在大多数情况下不在推荐浓度范围内。
