Garhwal Himalaya, India by using an LR-115 plastic track detector and radon emanometer.
Radon concentrations were found to vary from 1 KBq/m 3 to 57 KBq/m 3 in soil, 5 Bq/l to 887
Bq/l in water and 95 Bq/m 3 to 208 Bq/m 3 in air. The recorded values are quite high due to
associated uranium mineralization in the area. Radon concentration was also found to
depend on the tectonic structure and geology of the area.