2007年7月18日,桦甸市疾病预防控制中心对市政自来水日常监测中发现,自来水中锰含量严重超标,而桦甸市疾病预防控制中心近10年的自来水水质监测资料显示,市政自来水水源水、出厂水、末梢水中锰含量一直稳定,并且均没有超过国家标准。通过调查、监测分析认定,此次自来水中锰含量 July 18, 2007, Huadian City Center for Disease Control and Prevention of municipal tap water daily monitoring found that the tap water seriously exceeded the manganese content, and Huadian City Center for Disease Control and Prevention nearly 10 years of tap water quality monitoring data show that the municipal tap water Water, factory water, peripheral manganese content has been stable, and did not exceed the national standard. Through investigation, monitoring and analysis identified that the tap water manganese content