Analysis of the investigation results of iodine in drinking water in Hebei Province in 2017 / 中华地方病学杂志

ABSTRACT

Objective:To master the iodine content of drinking water in all counties (cities, districts) and clarify the distribution characteristics of water iodine and the distribution range of water-borne high iodine areas in Hebei Province.Methods:In all counties (cities, districts) of Hebei Province, water samples in townships (towns, street office, hereinafter referred township) were collected according to different water supply methods to detect iodine content in 2017; in townships with a median of water iodine ≥10 μg/L, the administrative village (neighborhood committee, hereinafter referred village) was used as a unit to collect water sample to detect iodine content.Results:A total of 2 199 townships in 168 counties (cities, districts) were surveyed for water iodine. The median range of water iodine of the townships was 0.0 - 1 113.7 μg/L. The median of water iodine in 1 579 townships was < 10 μg/L, accounting for 71.81% of the total; the number of townships with water iodine of 10 μg/L or more was 620. The village water iodine survey was carried out in the townships with water iodine of 10 μg/L or more, the number of villages monitored was 17 930. The number of villages with a median of water iodine of less than 10 μg/L was 2 312 (12.89%), and there were 6 104 villages with water iodine of 100 μg/L or more, accounting for 34.04%. The number of villages with median of water iodine ≥300 μg/L was 1 577 (8.80%). The water-borne high iodine areas in Hebei Province were distributed in 39 counties (cities, districts) of five cities, namely, Cangzhou, Handan, Xingtai, Hengshui and Langfang. They were mainly distributed in sheet shape or spot shape.Conclusion:The water-borne high iodine areas in Hebei Province are widely distributed, in the form of sheet or spot.