水体中的某些藻类能产生毒素 ,特别是蓝绿藻能产生对健康有潜在威胁的微囊藻毒素。仅通过自来水厂的一般工艺处理不仅不能去除微囊藻毒素 ,反而经过加氯消毒后 ,其致突变活性有可能增加。在供水中 ,藻类数量达到 1× 10 6个 /Ｌ、总磷达到 0 .2ｍｇ/Ｌ、总氮达到 0 .0 2ｍｇ/Ｌ Some algae in the water produce toxins, especially blue-green algae, that produce microcystins that pose a potential health risk. Only through the general process of water treatment plant not only can not remove microcystin, but after chlorination, the mutagenic activity may increase. In the water supply, the number of algae reached 1 × 10 6 / L, total phosphorus reached 0.2 mg / L, total nitrogen reached 0. 02mg / L