陕西省防氟改水项目区水氟含量的抽查与评估

Sampling and valuation on fluoride content of the water quality improvement areas preventing endemic fluorosis

目的：对防氟改水项目区、市、县上报的改水资料的真实性和可靠性进行验证。方法：对防氟改水任务较大的成阳、渭南、榆林3市所辖7个县14个乡42个村进行水氟含量和8～12岁在校儿童氟斑牙患病情况进行抽查。结果：本次抽查结果与原部分县、市上报改水资料之间差异较大（P〈0．01），原报水氟含量普遍高于本次抽查结果，分析方法不统一，采样地点不详，原报水氟含量距今时间跨度较大等是造成上述差异较大的主要原因。结论：虽然本次抽查结果与原报资料之间不符合的程度较高，但根据本次抽查水氟含量，8～12岁儿童氟斑牙患病情况，按卫生部地病司关于地方性氟中毒病区划分标准来判定，抽查区域均属中、重度地氟病区。符合国家防氟改水条件。

Verify the facticity and reliability of water quality improvement data reported by the cities and counties in shannxi. Methods： spot- checked water- fluoride content and station of dental fluorosis of children aged 8- 12 in 42 villages in 7 counties in shannxi. Results： there is bigger difference with this spot- checked results than the partly original data reported by the cities and counties（ P 〈 0.01）. The original results reported is generally higher than this results. The main causation that above difference is bigger is that analyses methods is not unified, original sampling location in detail is not known and the reported time of original results is too long from today etc. Conclusion： Although this spot- checked results disaccord with the original results reported, according to this spot- checked water- fluoride contents, the station of dental fluorosis of children aged 8 -- 12 and the standard to divide the disease district line （GB17018- 1997）, all area spot- checked belong to middling or heavy degree disease district and accord with the condition of water quality improvement to away from fluorosis.