On 9 February 2026, the Office of Environmental Health Hazard Assessment (OEHHA), under the California Environmental Protection Agency, finalized a health-protective concentration (HPC) of 5 parts per billion (ppb) for the noncancer effects of hexavalent chromium (Cr(VI)) in drinking water. The action forms part of the ongoing update of the chromium (Cr(VI)) Public Health Goal (PHG).
The noncancer HPC is based on findings of chronic liver inflammation in female rats exposed to Cr(VI) through drinking water. OEHHA indicated that a separate document outlining the derivation of the cancer-based HPC will be released at a later date.
Technical support documentation, along with responses to public comments and external scientific peer review, has been published on OEHHA’s website. The finalized HPC will inform the development of the updated PHG, which in turn is considered by the California State Water Resources Control Board when establishing enforceable Maximum Contaminant Levels (MCLs) for drinking water in California.

Consumer News Tags
Office of Environmental Health Hazard Assessment (OEHHA); Hexavalent Chromium; Cr(VI); Health-Protective Concentration; Public Health Goal; Drinking Water; Noncancer Effects; Environmental Regulation