GB/T 19380-2016

This standard defines the criteria and methods for identifying and delineating areas where drinking water contains excessive levels of iodine, as well as regions where such excess leads to endemic iodine-excess disorders. It is applied by public health authorities in China to conduct surveys, classify risk zones, and implement targeted interventions for water improvement and disease prevention. The standard is specifically used in rural and township settings where groundwater is the primary water source, guiding local health departments in monitoring and mitigating health risks from high iodine intake.