ABSTRACT
High F − deep well water has caused dental fluorosis prevailed in some areas of Zhejiang province. High As groundwater is mainly distributed in parts of the 2nd pore confined aquifer of plain area, such as As contents of groundwater in Nanxun, in the eastern plain area, is much higher than values of the standard (Standards for Drinking Water Quality (GB5749-1985) ≤0.01 mg/L), up to 0.08 mg/L; As concentrations in groundwater in Mayao, in the southern plain area, and west of Huzhou City, in the northern plain area, reach 0.02 mg/L, also exceeding the value of Standards for Drinking Water Quality. But this does not occur in the karst water and bedrock fissure water.
