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1991年春节,通化市铜镍矿区发生了一起腹泻暴发。经流行病学调查,证实是水源污染所致。该矿区总人口为6500人,其中南山、街东2240人,发病382人,罹患率为17.1%;朝阳、街西的居民无一人发病。2月15日出现首发病例,18日达高峰,19日停用供给南山、街东用水的水源后,疫情停止。患病区所用的生活用水为浅层地下水,井深仅10米,且无消毒和防护设施。在其上游30m 处,有一电解车间废水排污井。2月10日,该车间排污管连接处
In the spring of 1991, an outbreak of diarrhea occurred in the copper-nickel mining area of Tonghua City. The epidemiological survey confirmed that the water pollution caused. The mine’s total population of 6,500 people, of which Nanshan, East Street, 2240 people, the incidence of 382 people, the attack rate was 17.1%; Chaoyang, West Street residents no one disease. The first case occurred on February 15 and reached its peak on the 18th. After the suspension of the supply of water for Nanshan and East Street on the 19th, the epidemic stopped. Domestic water used in the affected area is shallow groundwater, only 10 meters deep and without disinfection and protection facilities. In its upstream 30m, there is a wastewater electrolysis plant wastewater well. February 10, the workshop sewage pipe connections