我市为饮水型地方性氟中毒病区，轻病区４１３个，重病区２１３个，自１９８４年开展改水降氟工作至１９９７年共完成工程２１４处，占总工程数的６０１％，很多病区吃上了低氟水，取得了明显的效益。为全面了解改水降氟工程管理使用情况和水氟含量动态变化，为今后的防治工 The city is drinking water endemic fluorosis ward, 413 light-affected areas, 213 seriously ill areas, since 1984 to carry out water fluoride work until 1997, completed a total of 214 projects, accounting for 60  1% of the total number of projects, Many wards ate low-fluoride water and achieved significant benefits. In order to fully understand the management of water and fluoride reduction project management and the dynamic changes of water fluorine content for future prevention workers