Organic matter removal efficiencies of conventional water treatment process and advanced water treatment process for Nanjing raw water in Yangtze River was introduced.Removal efficiencies of CODMn,UV254,DOC and BDOC of conventional water treatment process,biological enhanced activated(BEA) process and biological activated carbon(BAC) of the original data process are about 30 %,34 %,52 %;41 %,48 %,50 %;27 %,37 %,40 %;25 %,74 %,82 %,respectively.In advanced water treatment process,chlorobenzene compounds are ...