Abstract: Objective To explore the relationship between iodine content in drinking water and well depth in iodine deifciency area, and provide scientiifc basis for the development of prevention strategies to control iodine deifciency disorders. Methods According to the“Hebei Province resident drinking water iodine content survey program”, to carry water iodine monitoring for the residents of Yi County, water iodine contents were determined through arsenic cerium catalytic spectrophotometric method. Correlation analysis was carried out on the relationship between iodine content in drinking water and well depth. Results The water iodine average value of well depth was less than 20.00 m was 2.00μg/L or less. The water iodine average value of well depth between 20.00-180.00 m was 2.00μg/L or more. Iodine average value of different groups well depth was less than 10μg/L. By the correlation analysis, water iodine content and well depth existed the weak correlation in mountainous area(r=0.165, P<0.05), this situation had no true signiifcance(r2=0.027). There was no signiifcant correlation between water iodine content with well depth in hills and plain(r=-0.078, -0.076, P>0.05). Conclusion Water iodine content were very low, regardless of deep well or shallow well, and water iodine content has no correlation with well depth in existing wells in Yi County.

Key words: iodine deifcient area, water iodine, well depth