北京市的医疗卫生机构和综合医院很多,过去大部分没有污水处理设备。市防疫站曾组织18个区县防疫站,对108个医院的污水基本情况做了调查,并选择有代表性的污水做了理化、细菌学的检验。分析结果表明;这些医疗单位排出的污水中含有大量的病原菌、病毒、寄生虫卵等。这种污水未经处理,排入沟渠或河湖之中,或者用于灌溉,对于水体和环境的污染是十分严重的, There are many medical and health institutions and general hospitals in Beijing. In the past, most of them did not have sewage treatment facilities. The Municipal Epidemic Prevention Station had organized 18 district and county epidemic prevention stations to investigate the basic conditions of the sewage of 108 hospitals, and selected a representative type of sewage for physicochemical and bacteriological tests. The analysis results show that the sewage discharged by these medical units contains a large number of pathogenic bacteria, viruses, and parasite eggs. This sewage is not treated and discharged into ditches or rivers and lakes, or used for irrigation. The pollution to water bodies and the environment is very serious.