Poor: Disinfectant and/or microbial levels in treated water frequently out of specification.
Poor: Disinfectant and/or microbial levels in treated water frequently out of specification.
差：处理水的消毒和/或微生物水平经常超出标准。
Poor: Disinfectant and/or microbial levels in treated water frequently out of specification.
差：处理水的消毒和/或微生物水平经常超出标准。