Radon Water Test Kit for Well or City Water (West)Tests your well or city water for the level of Radon in your drinking water. Radon is a colorless and odorless gas that is produced underground through the natural and spontaneous radioactive decay of radioactive minerals in the ground. Testing the radon in your water will provide the information needed to better understand whether the levels in your water might be contributing to levels in air tests. Returns require pre authorization. Return shipping