DNA damage levels induced by organic extracts of CDW sampled on August were higher than on March. DNA damage levels by organic extracts of CDW from raw water source of H river were the highest of three raw water sources.

• 结论 武汉市主要水源 C江、D湖、H水的氯化饮水有机提取物对 Hep G2 DNA有损伤作用 ,损伤作用的严重程度 H水 >D湖 >C江 ,丰水期 >平水期