The Office of Environmental Health Hazard Assessment (OEHHA) of the California Environmental Protection Agency is announcing the availability of the draft technical support document for the update of the Public Health Goals (PHGs) for cis-1,2-dichloroethylene (cis-1,2-DCE) and trans-1,2-dichloroethylene (trans-1,2-DCE) in drinking water. The document proposes an updated PHG of 13 parts per billion (ppb) for cis-1,2-DCE and 50 ppb for trans-1,2-DCE.