Radon (222Rn) measurements were undertaken in 16 samples of well water representing different depths and different types of aquifers found at the city centre of Konya, Central Turkey. The radon activity concentrations of the well water samples collected in the spring and summer seasons of 2012 were measured by using the radon gas analyser (AlphaGUARD PQ 2000PRO). The radon concentrations for spring and summer seasons are 2.29±0.17 to 27.25±1.07 and 1.44±0.18 to 27.45±1.25 Bq l-1, respectively. The results at hand revealed that the radon concentration levels of the waters strictly depend on the seasons and are slightly variable with depth. Eleven of the 16 well water samples had radon concentration levels below the safe limit of 11.11 Bq l-1 recommended by the United States Environmental Protection Agency. However, all measured radon concentration levels are well below the 100 Bq l-1 safe limit declared by the World Health Organisation. The doses resulting from the consumption of these waters were calculated. The calculated minimum and maximum effective doses are 0.29 and 5.49 μSv a-1, respectively. ©The Author 2013. Published by Oxford University Press.