高氯酸盐和硝酸盐都是甲状腺激素。， 防止甲状腺吸收的药物 碘化物。几项环境研究的重点是 高氯酸盐是公共场所唯一的水性甲状腺肿 饮用水源的健康问题；然而，任何 高氯酸盐对甲状腺肿大健康的潜在影响 与其他水上交通工具分开理解 甲状腺激素。这项研究旨在确定 加州高氯酸盐和硝酸盐的分布 饮用水源和调查共同发生的情况， 如果有的话，这些甲状腺激素。 来自加州卫生部的数据 饮用水和环境服务司 水源监测数据库 对结果进行分析。 研究发现 硝酸盐的浓度明显更高 比高氯酸盐（以及更广泛的 地理区域），并与高氯酸盐共存。 含有可检测污染物的饮用水源 平均而言，高氯酸盐的含量要高得多 硝酸盐浓度与其他 消息来源。这项研究深入了解了 水源可能被多种分析物污染 同时，如何确定 这些污染物有一个共同的来源或渗透 路线包括19个参考文献、表格和图表。

Perchlorate and nitrate are both goitrogens, i.e., agents that can prevent the thyroid from absorbing iodide. Several environmental studies have focused on perchlorate as the sole waterborne goitrogen of public health concern in drinking water sources; however, any potential goitrogenic health effects of perchlorate cannot be understood in isolation from other waterborne goitrogens. This research set out to determine the overall distribution of perchlorate and nitrate in California drinking water sources and investigate the co-occurrence, if any, of these goitrogens. Data from the California Department of Health Services Division of Drinking Water and Environmental Monitoring database of source water monitoring results were analyzed. The study found that nitrate occurred in significantly higher concentrations than perchlorate (and over a much broader geographic area) and co-occurred with perchlorate. Drinking water sources that contained detectable levels of perchlorate had, on average, much higher concentrations of nitrates compared with other sources. This research provides insight into how water sources can be contaminated by multiple analytes simultaneously and how to determine whether these contaminants share a common source or infiltration route. Includes 19 references, tables, figure.