ABSTRACT
Arsenic pollution in tube well water was observed at both Red river and Mekong river deltas with different levels. The average concentrations were determined as 1.3 µg/L; 6.8 µg/L; 72 µg/L; 165 µg/L; 277 µg/L; 421.5 µg/L at Triton (Angiang); Tuliem (Hanoi); Tanhong (Dongthap); Thanhtri (Hanoi); Hoaiduc (Hatay) and Lynhan (Hanam) respectively. Filtration groundwater by sand has removed a major portion of arsenic. The arsenic accumulation in hair sample is useful biomarker for assessment of chronic intoxication of arsenic form drinking and daily use water. It is proved by closely correlation between arsenic contents in hair and consumed water (R2= 0.935). More detail screening of arsenic pollution in tube well water, evaluation of health effect and education for people to use free arsenic water are the most important approaches.