Yantai Center for Disease Control and Prevention, Yantai, Shandong, 264003, People's Republic of China.
School of Public Health, Binzhou Medical College, Yantai, Shandong, 264003, People's Republic of China.
BMC Public Health. 2020 Apr 3;20(1):437. doi: 10.1186/s12889-020-08583-y.
Nitrate is one of the most common chemical contaminants of groundwater, and it is an important unqualified factor of rural groundwater in Yantai. In order to assess the risk of exposure to drinking water nitrate for adults and juveniles, in recent years, we monitored the nitrate concentrations in rural drinking water,a model was also used to assess the human health risk of nitrate pollution in groundwater.
From the year 2015 to 2018, the drinking water in rural areas of Yantai was tested according to the "Sanitary Standard for Drinking Water" (GB5749-2006). The principal component analysis was used to analyze the relationship between groundwater chemicals and nitrate. The model was used to assess human health risks of groundwater nitrate through the drinking water and skin contact.
A total of 2348 samples were tested during the year 2015-2018.Nitrate and total dissolved solids, total hardness, chloride are all relevant, the above indicators may come from the same source of pollution; The median nitrate content (C) was 17.8 mg / L; the risk of exposure in each group was ranked as: Juveniles > Adult female > Adult male;the median health risk (HQ) for minors and adults exceed 1.
The concentrations of nitrate is stable and does not change over time. The high concentration of nitrate in rural areas of Yantai may be the result of the interaction of fertilizers and geological factors. The risk of exposure to nitrate in juveniles and adults is above the limit, so it is necessary to be on the alert for the high levels of nitrate.
硝酸盐是地下水最常见的化学污染物之一，也是烟台农村地下水的一个重要不合格因素。为了评估成年人和青少年饮用水中硝酸盐暴露的风险，近年来，我们监测了农村饮用水中的硝酸盐浓度，并建立了模型来评估地下水硝酸盐污染对人体健康的风险。
2015 年至 2018 年，按照《生活饮用水卫生标准》（GB5749-2006）对烟台市农村饮用水进行检测。采用主成分分析方法分析地下水化学物质与硝酸盐之间的关系。采用模型通过饮用水和皮肤接触评估地下水硝酸盐对人体健康的风险。
2015-2018 年共检测 2348 份样品。硝酸盐与总溶解固体、总硬度、氯化物均相关，上述指标可能来自同一污染源；硝酸盐含量的中位数（C）为 17.8mg/L；各群体的暴露风险依次为：青少年>成年女性>成年男性；未成年和成年人的中位健康风险（HQ）均超过 1。
硝酸盐浓度稳定，无时间变化。烟台农村地区硝酸盐浓度较高可能是肥料和地质因素相互作用的结果。青少年和成年人接触硝酸盐的风险超过了限值，因此需要警惕硝酸盐含量过高的问题。
