Thermally regenerated GAC showed the best recovery in DOC adsorption. F400, TiO2- and Ag-GAC exhibited preferential adsorption for hydrophobic Br-THMs. Greater adsorption recovery was observed for Br-THMs than Cl-THMs. Free chlorine were completely decomposed before and after all GAC regeneration. Ag-GAC showed a strong anti-microbial activity recovery after ozone regeneration.