The Health Risk Assessment of CCl4 in groundwater of a Certain Chemical Plant

Based on the evaluation method for health risks of contaminated sites recommended by USEPA, in combination with the Chinese habit of drinking boiled water, the author conducted a pollution analysis and health risk assessment of groundwater near the downstream of a chemical plant. The analysis showed that the groundwater had been polluted by CCl4, with the highest up to 1732.5 times of the national standard (china) and that the most serious polluted area continued to extend to the downstream with an area of 147174m(2). Health risk assessment shows that groundwater in contaminated areas is no longer suitable for drinking, and the maximum risk of carcinogenesis is more than 15.1 times of the acceptable level. In addition the main exposure way of carcinogenic risk and non-carcinogenic risk is the drinking absorption. The risk of drinking absorption is about 150 times the risk of skin absorption.