In Vietnam, four individual trihalomethanes with CHCl3, CHBr3, CHBr2Cl, CHBrCl2 are regulated with a maximum contaminant level of 200, 100, 100 and 60 μg / L, respectively.
Ở Việt Nam, theo QCVN 01:2 009 / BYT: CHCl3 200 µg / L, CHCl2Br 60 µg / L, CHBr2Cl 100 µg / L, CHBr3 100 µg / L.