Uranium is a metal that occurs naturally in bedrock all over the world. When groundwater comes in contact with the bedrock, the metal may leach out and contaminate private wells. Due to the underlying bedrock, some groundwater in Glastonbury has naturally occurring uranium. In most of the wells where it has been detected it was below the maximum contaminant level of 30 ug/l set by the US Environmental Protection Agency. 

Uranium is considered toxic and can have a variety of adverse health effects if people are exposed at high enough levels and for a long period of time. The level of risk of uranium in well water is a health-based limit calculated by assuming that a person drinks 2 liters of water a day for 70 years. The type of uranium found in groundwater is not considered a radioactive risk and is therefore not a major cancer concern. However, the toxicity of the uranium metal has been associated with adverse effects on kidney function and there is a small increase in cancer risk over the course of a lifetime.  

Summary of the Glastonbury and Thriving Earth Exchange Uranium Study

Complete Report of the Glastonbury and Thriving Earth Exchange Uranium Study

Thriving Earth Exchange