Trihalomethanes are regulated by the United States Environmental Protection Agency (USEPA) with a maximum contaminant level (MCL) of 80 μg / L, the European Communities with 100 μg / L, the World Health Organization for the four individual trihalomethanes with CHCl3 (0.3 mg / L), CHBr3 (0.1 mg / L), CHBr2Cl (0.1 mg / L) and CHBrCl2 (0.06 mg/L).