Chemical Industry Faults OEHHA’s Stringent Noncancer Risk Level For Cr6

Chemical industry officials are criticizing California’s proposed health-protective concentration (HPC) for noncancer effects of hexavalent chromium (Cr6) in drinking water, charging the value that may help determine water regulators’ separate cleanup standard is too stringent and based in part on faulty scientific methods including an overly broad uncertainty factor. During a Jan. 8 public workshop, the industry officials charged that the Office of Environmental Health Hazard Assessment’s (OEHHA) Nov. 24 draft technical support document for its proposed noncancer HPC used...