Sometimes less is more. Two utility companies and more than 200,000 residents in Delaware would be affected by a proposal that would lower the acceptable amount of three chemicals in drinking water.
The parts per billion in drinking water of perchloroethylene, tetrachloroetheylene and vinyl chloride would be lowered to and around 1 ppb. Currently, PCE is allowed at 5ppb.
As the Wilmington News Journal reports, PCE and TCE are used to make cleaning solvents, and vinyl chloride is used in plastics. All three are considered “probable carcinogens.”
The proposed changes will first apply to public water supplies, but private well water tests could lead to similar restrictions on that front.