Since radon found in indoor air is a health concern, the EPA recommends that you test the air in the house for radon as well as the drinking water. If the air in the house tests positive for a radon concentration, then you should also test your water Radon in the water isn’t common but shouldn’t be neglected. If your source of water is a public water system, you should look into whether it originates from a surface river, lake, or reservoir or a ground water, underground source. Water from a surface water source achieves the most radon in the water being released into the air before reaching the tap. Water that comes from a groundwater source necessitates calling a local Water & Sewerage board to find out if they have diagnosed the water for radon. If they haven’t verified the quality of the water, you want to request that be done. If they refuse, there are other avenues you can turn to for assistance. If you are relying on a well on your property, you need to find out how deep the well is. Most likely, well water is free of contamination from radon. There is great deal of natural filtering. The water passes through rock, which is creates natural filtering, thereby releasing the radon from the water. If drawing water from a surface water well, the depth of the well significantly impacts the presence of radon. You should always check for radon if you have any worries that radon might be present in your house or water.