The only way to know if your water is safe is to have it analyzed in a laboratory. In addition to contamination from naturally-occurring materials, well water can also become contaminated with solvents, pesticides, volatile organic compounds contained in gasoline, and other synthetic chemicals when spills or leaks occur nearby. Groundwater migrates through porous sands and gravels and through cracks in bedrock, carrying any contaminants to nearby wells. DES suggests that residential wells be tested soon after a new well is installed, every time a property changes owners, routinely every three to five years and whenever users notice changes in the taste, smell or color of the water. The basic analysis conducted through the DES water testing lab includes tests for bacteria, iron, manganese, chloride, fluoride, nitrates, sodium, lead, copper and arsenic.
Separate tests analyze for radon, volatile organic compounds and other constituents.
Contaminated water can often be treated by various methods, such as aeration and carbon filtration, so the water is rendered safe to drink. But treatment, especially for radon contamination, can be extremely expensive. Peg Boyles, Program Associate, Agricultural Resources UNH Cooperative Extension programs and policies are consistent with pertinent Federal and State Laws and regulations on non-discrimination regarding race, color, religion, sex, age, national origin, sexual orientation, disability, veteran status, or marital status. UNH, U.S. Dept. of Agriculture, and New Hampshire counties cooperating.