Yes. The State of California, which regulates the treatment of groundwater and surface water, is also responsible for regulating the production of purified water. Regulations ensure water purveyors meet state and federal water quality standards, making certain the water is safe. This also includes testing and strict water quality requirements for removing constituents of emerging concern such as pharmaceuticals and personal care products. The National Water Research Institute (PDF) commissioned a third-party, technical panel to evaluate and review the District’s Pure Water Soquel Project and they concluded that the project was "plausible, feasible and protective of public health". Water quality sampling confirms purified water that undergoes this level of treatment has a much higher level of water quality than treated groundwater or surface water.