Pollutants　removal　effects　of　powdered　activated　carbon-ultrafiltration　(PAC-UF)　treatment　process　was　examined.　Disinfection　effect　of　chlorine　and　chloramines　were　compared　on　control　of　microbe　regrowth　and　disinfection　by-products　formation.　The　safety　of　treated　water　of　the　PAC-UF　treatment　process　was　comprehensively　evaluated.　The　results　show　that　colloids　and　pathogenic　microbes　can　be　removed　efficiently　by　the　PAC-UF　treatment　process.　Average　removal　rates　of　ammonium,　CODMn　(chemical　oxygen　demand),　UV254　(ultraviolet　in　254　nm)　and　DOC　(disolved　organic　carbon)　are　36.04%,　44.28%,　44.94%　and　30.65%　respectively.　The　bacteria　and　coliform　index　of　the　water　samples　appears　significantly　regrowth　after　24　h　without　disinfection.　Chloramine　has　better　continuous　disinfection　effects　than　chlorine＇s　effects　on　inactivation　of　microbe　and　maintenance　of　residual　chlorine.　The　THMs　(trihalomethanes)　and　HAAs　(haloacetic　acids)　produced　by　chloramine　disinfection　are　lowered　63.42%　and　44.13%　than　by　chlorine　disinfection　respectively,　and　formation　of　brominated　disinfection　by-products　is　decreased　effectively　too.　Safeties　of　treated　water　by　PAC-UF　treatment　process　can　be　enhanced　by　chloramines.