Among the three pollutants,we must pay more attention to pentachlorophenol which environmental concentration in the Haihe River is 8.04 times higher than the no effect concentrations.

• 其中五氯苯酚的污染问题尤应引起足够重视,因为五氯苯酚的环境实测浓度已经超过无影响浓度的8 04倍。