Uranium is a naturally occurring element in groundwater and is more common in some of the mountain areas of the state. However, there is little information on where uranium may be found. Uranium gets into drinking water when groundwater dissolves minerals that contain uranium. The amount of uranium in well water will vary depending upon its concentration in bedrock. However, even within areas that have bedrock types containing uranium, there is a large degree of variation within relatively small areas. Levels of naturally occurring radiation in water are not likely to be high in shallow wells. The potential exists for deep bedrock wells in New Hampshire and Maine to have uranium, although most will be very low. High levels of uranium indicate the potential for radon and radium also to be present.