Abstract
In this study, trihalomethane formation potential (THMFP) was considered a kind of water quality item, same as COD, or BOD. The discharge of THM precursor from various sources, and its runoff process to public water area were illustrated using pollutant-load- factor method for quantitative study. As a case study, the pollution load analysis of THMFP in KOTOH river basin was also carried out. The results in dicated that about 50% of pollution load of THMFP was attributed from nature. It was shown that the pollutant-load- factor method was effective for the management of THM polluted in river basins.