The World Health Organization (WHO) estimates that around ~150 million people in 70 different countries have been consuming water with arsenic levels higher than the recommended limit of 10 μg/L. Here we describe the concentrations of inorganic arsenic in drinking water in homes of pregnant women living in the province of Tacna, near the southern border of Peru. 161 pregnant women were enrolled in their second trimester of pregnancy. A total of 100mL drinking water was collected in each household from the source of most common use. Inorganic arsenic was categorized into 3 levels with a commercial kit. Thirty percent of women had drinking water ≤10 μg/L (the WHO recommended level), 35% had 25 μg/L, and 35% had greater than 50 μg/L. Low arsenic levels were found in the southernmost homes, supplied by groundwater, while high levels were found in the northern and metropolitan homes supplied by river water.

中文翻译：

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家庭饮用水中的砷浓度：秘鲁塔克纳孕妇的横断面调查，2019 年。

世界卫生组织 (WHO) 估计，70 个不同国家的约 1.5 亿人一直在饮用砷含量高于建议限值 10 μg/L 的水。在这里，我们描述了居住在靠近秘鲁南部边境的塔克纳省的孕妇家中饮用水中无机砷的浓度。161 名孕妇参加了妊娠中期。每个家庭从最常用的水源收集了总计 100 毫升的饮用水。使用商业试剂盒将无机砷分为 3 个级别。30% 的女性饮用水≤10 μg/L（WHO 推荐水平），35% 为 25 μg/L，35% 大于 50 μg/L。在最南端的房屋中发现低砷含量，由地下水供应，