In Duy Tien district, in 359 of 1112 samples, the water has an arsenic standard exceeding the TCVN 5944-1995 standard , which is an increase from 120% to 1000% ; also, in 553 of 1112 samples, the water has an arsenic standard exceeding the WHO standard, which is an increase from 200% to 50 , 000%. In the worst cases, 5 water samples have the highest arsenic content : up to 0 . 5 mg/l.
New words, one handy idiom, and a 2-minute quiz — delivered to your inbox to keep your streak alive.