But i think you could before know the dose coefficient by ingestion of Uranium (238, 234 and 235), Radon and short half-life daughters (Alpha nd beta), keep the annual average consumption of water and you could know the dose by ingestion radionuclides present in drinking water
A clear overview of how to calculate the annual effective dose for radon in ingested groundwater you may find in reference: https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4514460/
But i think you could before know the dose coefficient by ingestion of Uranium (238, 234 and 235), Radon and short half-life daughters (Alpha nd beta), keep the annual average consumption of water and you could know the dose by ingestion radionuclides present in drinking water
the sample must take in clean sealed plastic bottles to prevent the radon leak, the bottles should close tightly and carried gently to minimize degassing. At the time of sampling, the pH value of each samples was measured. The bottles are completely sealed for more than 1 month to allow radioactive equilibrium to be reached. The calculation you may find it in this reference.