  One of the most important characterizations of social health is existence the
availability of safe drinking water. Since one of the sources of water
contamination is nuclear contamination from radon gas, so in this research
radon 222 concentration levels in water supplies in the Toyserkan (a region
located in the west of Iran) is investigated. For measuring radon gas in water
wells and springs Lucas chamber method is used. Review the results of these
measurements that taken from 15th place show that, only five sites have radon
concentrations above the limit dose. To reduce radon concentration, it is
better to keep water in open pools in contact with air before the water is
delivered to users.
