The impact of "Five Water Governance" policy on iodine level of drinking water of residents in the external environment in Hangzhou City
10.3760/cma.j.cn231583-20221205-00392
- VernacularTitle:"五水共治"对杭州市外环境居民生活饮用水碘含量的影响
- Author:
Liangliang HUO
1
;
Tingting ZHAO
;
Qilin SHENG
Author Information
1. 杭州市疾病预防控制中心传染病防制所，杭州 310021
- Keywords:
Drinking water;
Iodine;
External environment
- From:
Chinese Journal of Endemiology
2023;42(10):790-793
- CountryChina
- Language:Chinese
-
Abstract:
Objective:To study the impact of "Five Water Governance" policy on iodine in drinking water of residents in the external environment in Hangzhou City, and to provide scientific basis for iodine supplementation in accordance with local conditions.Methods:In May 2017, in the process of implementing the "Five Water Governance" program in Hangzhou City, water samples were collected in 13 districts (counties and cities) with towns as units according to different water supply methods. The "Method for Iodine Detection in Iodine-deficient and High-iodine Areas" recommended by the National Iodine Deficiency Disorders Reference Laboratory was adopted for water iodine detection. According to the water source (tap water, well water, spring water) and geographical location (urban area, suburb area, rural area), the distribution of water iodine was analyzed.Results:A total of 722 water samples were tested in the city, the median water iodine was 1.1 μg/L, ranged from 0.3 to 105.0 μg/L, the median water iodine of all districts (counties, cities) was < 10 μg/L. There were 182 townships in the city, with 94 townships providing centralized water supply, 3 townships decentralized water supply, and 85 townships mixed water supply. The median water iodine levels in tap water, well water, and spring water were 1.3, 0.9, and 1.6 μg/L, respectively, and the median iodine levels in urban, suburban, and rural water were 3.6, 1.2, and 1.0 μg/L, respectively.Conclusions:The iodine content in the drinking water of residents in the external environment of Hangzhou City is relatively low, and it still belongs to iodine deficiency areas. The strategy of salt iodization for prevention and treatment of iodine deficiency disorders should be continued while the measures of "Five Water Governance" are carried out.
