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目的寻找及分析因井水亚硝酸盐污染自来水管网导致中毒暴发事件的原因。方法根据流行病学调查、环境卫生现场调查资料和水质检验结果分析事故。结果事故工厂生产工艺需用大量亚硝酸钠和水,生产区有一工业用井水,生产区内井水亚硝酸钠严重超标,井水管道与镇自来水管网相通,事故原因是井水亚硝酸钠污染自来水引起的19例人员亚硝酸盐中毒。结论工厂违反饮用水卫生规范要求,擅自将井水管道与镇自来水管网相连接,有关部门缺乏对工厂饮用水安全的检查。
Objective To find out and analyze the cause of poisoning outbreak caused by nitrite pollution of tap water pipe network. Methods According to epidemiological survey, environmental health field survey data and water quality test results to analyze the accident. Results The accident factory production process requires a large amount of sodium nitrite and water, the production area has an industrial well water, production wells seriously exceed the standard sodium nitrite, well water pipelines and town water pipe network connected, the cause of the accident well water nitrite 19 cases of sodium nitrite poisoning caused by sodium contamination of tap water. Conclusion The factory violated the hygiene standards of drinking water and illegally connected the well pipe to the town water pipe network. The departments concerned lacked the inspection on the safety of drinking water in the factory.