What are the drinking water standards for arsenic and uranium?
The state and federal public drinking water (PWS) standard for arsenic is 0.010 milligrams per liter (mg/L) (or 10 parts per billion ppb). The drinking water standard for uranium is 0.030 mg/L (or 30 ppb). Private well standards are determined by the local board of health (BOH) and are typically the same as the state and federal PWS standards.
