Lead concentration in soil was 43 times higher in Ban Thi and 3, 5 times higher in Tan Long than the Vietnamese standard - Lead in air: 30% of air samples exceeding the Vietnamese standard, average of lead concentration in air were 4 times higher than the Vietnamese standard in both Ban Thi and Tan Long - Lead in drinking water: 9.68% in Ban Thi and 13.33% in Tan Long exceeding the permitted standard 4.2.2.