Spatial and temporal distribution of arsenic concentration in rural drinking water and health risk assessment in Northern China from 2013 to 2022: a case study of Inner Mongolia Autonomous Region.

Although the number of compliant samples showed a slight decrease in 2015 and 2018 compared to the previous year, the percentage of samples meeting the standard showed an increasing trend overall.

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The proportion of samples exceeding the standard by up to 10 times and over 10 times both demonstrated a decreasing trend, with no samples exceeding the standard by over 10 times by 2022.

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