Household salt iodine level monitoring exercise was conducted in 10 schools with a representation from the various zones. The lowlands and highlands each had 4 schools and the urban setup 2 two schools. The exercise in schools was conducted between 8 th and 11 th June, 2021 Purposive sampling was done to identify sampling zones. Due to agro-climatic and natural characteristics Manyatta and Runyenjes sub-counties were selected to represent the highland zone and urban settings. Mbeere South and

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... eere North represented the lowlands. Grade three and class five pupils were involved the sampling. Due to the high numbers (enrollment in the targeted classes more than 35 which was the expected sample size per school) systematic random sampling technique was applied to identify the pupils to bring in the samples. A total number of 350 samples were collected. Out of a total of 350 samples collected and tested using the RTK, only one was found to have low iodine (light blue colour) after both the initial test and the confirmatory test. The rest of the samples (349) were found to have high iodine (dark blue colour).