The more than 800,000 state residents who use private wells as their main source for drinking, bathing or cooking water should have their water tested for bacteria and other contaminants, the Connecticut Department of Public Health says. Connecticut does not require annual testing of private well water, leaving voluntary self-testing the only reliable way to find out if any groundwater contaminants have entered the well. Private wells in the northeast historically have found traces of the naturally occurring chemicals in well water. The Town of Glastonbury recently announced it would be testing private well water in specific neighborhoods due to elevated levels of uranium being discovered in local private wells. “Water plays an essential role in everyone’s life.