
The present works deals with internal radiation dose of Po-210 through the consumption of drinking water from Tiruchirappalli city. The concentration of Po-210 was determined in 10 (S1-S10) different drinking water samples. The Po-210 in drinking water ranged from 0.67 mBq/l to1.75 mBq/l. The highest Po-210 activity measured in Thillai nagar (S5) water sample. The Po-210 dose to the individual member of public by consumption of drinking water ranged from 0.70 µSv/y to 1.77 µSv/y.