Survey on the Residents' Iodine Level in High Iodine Area after Taking Low Iodine Water in Shouguang City,2009

[Objective] To take scientific methods to complement the iodine of the residents in high iodine area according to their iodine level after taking a low iodine water.[Methods]In 2009,testing the iodine content in the local water and imported water;testing iodine content of salt;testing the urine iodine level about 8 to 10-year-old children and their family members and pregnant women in the coastal Yangkou and Houzhen town of Shouguang city.[Results]The median iodine in water in Yangkou town is 186.3 μg/L,the average value of the iodine in running water is 9.3 μg/L;after taking iodized salt for 30 days,the median urinary iodine in iodized salt group is 260.9 μg/L,non-iodized salt group is 147.3 μg/L.Before changing water in Houzhen town of Rural(before 2007),the median iodine in water which was supplied by concentration is 70.2 μg/L,after that(since2009),the average value of iodine in water is 16.3 μg/L.In 2009,the eating percentage of iodized salt in Houzhen town was 55.56%,the average value of iodine and salt in water is 30.5 mg/kg;urinary iodine for children aged 8 to 10 is 169.3 μg/L,pregnant women is 138.6 μg/L.[Conclusion]After changing the water,the iodine level of residents in Yangkou Town is appropriate or higher;the iodine nutrition level of villagers in Hou Zhen is inadequate.