Abstract
The quality of drinking water is closely related to the health condition of the population. In order to effectively assess the heavy metal environment of drinking water in Guizhou Province, this paper first analyzed the distribution characteristics of heavy metals in drinking water, and then used the environmental health risk assessment model recommended by the United States Environmental Protection Agency (US EPA) to investigate and analyze the toxic and hazardous substances in drinking water in Guizhou Province in 2019 to assess the health risks of heavy metals in drinking water. The survey results showed that the cancer-causing health risks of drinking water in Guizhou Province exceeded the EPA evaluation standards, while the non-cancer-causing health risks were much lower than the evaluation standards. Finally, for the heavy metal environment of drinking water in Guizhou province, this paper proposes corresponding response strategies from two perspectives of water quality monitoring and government supervision.
Highlights
Water quality is closely related to human health and is the basic material basis for human survival
This paper uses the risk assessment model recommended by the Environmental Protection Agency (EPA), combined with local drinking water exposure parameters, to quantitatively describe the possibility of heavy metal substance contamination in drinking water in Guizhou Province causing harm to residents' health, and to target the relevant response strategies
Compared with arsenic and cadmium, the heavy metal chromium has a decisive role in the carcinogenic risk of water bodies, and attention should be paid to the risk management of chromium
Summary
Water quality is closely related to human health and is the basic material basis for human survival. The heavy metals present in nature are lightly hazardous, but the solid wastes, waste water, and exhaust gases generated by the industrialized production in modern society enter the water bodies, upper soil, and plants, causing serious pollution of heavy metals in the environment, and their pollution has a wide range, accumulation, concealment, long duration, and difficulty in degradation,. They even combine with organic matter through chemical and biological effects to form more toxic organic metals. This paper uses the risk assessment model recommended by the EPA, combined with local drinking water exposure parameters, to quantitatively describe the possibility of heavy metal substance contamination in drinking water in Guizhou Province causing harm to residents' health, and to target the relevant response strategies
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