Correlation between iodine level in drinking water and conventional water quality indicators
10.3760/cma.j.cn231583-20250103-00008
- VernacularTitle:饮用水碘含量与常规水质指标的相关性分析
- Author:
Xiaoxue SHI
1
;
Demei ZHOU
;
Chun XIE
;
Hongbing YE
;
Yang LI
;
Xuan LI
;
Gang CHEN
;
Mengjie YANG
;
Hong XIANG
Author Information
1. 贵州医科大学公共卫生与健康学院 环境污染与疾病监控教育部重点实验室，贵阳 561113
- Publication Type:Journal Article
- Keywords:
Dringking water;
Iodine;
Conventional water quality indicators;
Correlation analysis
- From:
Chinese Journal of Endemiology
2025;44(7):558-562
- CountryChina
- Language:Chinese
-
Abstract:
Objective:To study the correlation between iodine level in drinking water and conventional water quality indicators.Methods:From June 2017 to July 2018, a simple random sampling method was used to select administrative villages (communities) from 88 counties (cities, districts) in Guizhou Province with a sampling size greater than 5%. One drinking water sample was collected from each administrative village (community), and conventional water quality indicators (including fluorine, aluminum, mercury, selenium, sulfate, total dissolved solids and total hardness) were tested in accordance with the methods outlined in the "Standards for Drinking Water Quality" (GB 5749-2006). The cerium sulfate catalytic spectrophotometric method was employed to test drinking water iodine level. Spearman method was utilized to analyze the correlation between iodine level in drinking water and conventional water quality indicators.Results:A total of 904 drinking water samples were tested, with a median iodine level of 1.90 μg/L and a range of 0.10 - 36.70 μg/L. There were 899 administrative villages (communities) with a water iodine level of less than 10 μg/L, accounting for 99.45%. There were only 5 administrative villages (communities) with a water iodine level of greater than 10 μg/L, accounting for 0.55%. Correlation analysis revealed that in Guizhou Province, the iodine level in drinking water was positively correlated with the levels of fluorine, aluminum, sulfate, total dissolved solids, and total hardness [correlation coefficients ( r) = 0.11, 0.07, 0.07, 0.08, 0.07, P < 0.05], and was a negatively correlated with mercury and selenium levels ( r = - 0.12, - 0.12, P < 0.001). Conclusions:External environment in Guizhou Province is generally deficient in iodine. The iodine level in drinking water is positively correlated with the levels of fluorine, aluminum, sulfate, total dissolved solids, and total hardness, and negatively correlated with the levels of mercury and selenium.
