This paper presents the concentration of uranium in 67 groundwater samples of Chamarajanagar district, Karnataka, India, estimated using an LED fluorimeter. The age-dependent ingestion dose to the population of the district is also studied. The concentration of uranium in groundwater varied from 0.20 to 57.50 μg L-1 with an average of 4.40 μg L-1. The annual ingestion dose due to uranium varies from 0.18 to 142.68 μSv y-1, with an average of 7.11 μSv y-1. The ingestion dose received by the population in the study area is less than the recommended level of 100 μSv y-1 by the World Health Organization (2011).
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