From The San Bernardino County Sun (Jim Steinberg):
The Department of Public Health on Tuesday submitted its final regulation package putting a cap on chromium-6 to the state Office of Administrative Law, for review under the Administrative Procedures Act.
“The drinking-water standard for hexavalent chromium (chromium-6) of 10 parts per billion will protect public health while taking into consideration economic and technical feasibility as required by law,” said Dr. Ron Chapman, CDPH director and state health officer.
That legally enforceable standard replaces one that was already the strictest in the nation, but for total chromium.
The current California sets 50 parts per billion total chromium as the maximum allowable in drinking water. This amount includes both chromium-3, which is not a carcinogen and necessary, in small amounts, to human life, and chromium-6, an atomic relative that has been shown to cause several types of cancers.
The federal standard, set by the Environmental Protection Agency, is 100 parts per billion for total chromium, which is chromium-3 and chromium-6.
More water treatment coverage here.