What is Safe arsenic level in drinking water?

Arsenic may be found in water which has flowed through arsenic-rich rocks. Severe health effects have been observed in populations drinking arsenic-rich water over long periods in countries world-wide. 0.01 mg/L was established as a provisional guideline value for arsenic.

Based on health criteria, the guideline value for arsenic in drinking-water would be less than 0.01mg/L.

Because the guideline value is restricted by measurement limitations, and 0.01 mg/L is the realistic limit to measurement, this is termed a provisional guideline value.