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三氯乙醛在DDT,敌百虫和水合氯醛的生产中被大量使用。位于××水库上游的××农药厂的生产污水中含有大量的三氯乙醛,未经处理的污水中三氯乙醛的含量可以高达1000～4500毫克/升。1972年良田屯的饮用水井受到该农药厂的污水污染后,居民中曾经出现嗜睡、乏力等症状。为了防止××水库的污染,保护居民健康,要求提出三氯乙醛的卫生标准,为此进行了三氯乙醛在地面水中最大容许浓度的研究。
Chloral is widely used in the production of DDT, trichlorfon and chloral hydrate. The xx pesticide plant located in the upstream of ×× reservoir contains a large amount of chloral in the production effluent, and the content of trichloroacetaldehyde in the untreated sewage can be as high as 1000 to 4500 mg / l. After the drinking water well in Liangtian Village was polluted by the sewage of the pesticide plant in 1972, the residents had symptoms of lethargy and fatigue. In order to prevent the pollution of ×× reservoirs and protect the health of residents, it is required to put forward the hygienic standard of chloral, for which the maximum allowable concentration of chloral in surface water is studied.