By Sean Maher
Oakland Tribune
Posted: 10/19/2009
Updated: 10/20/2009
OAKLAND — The scientific back end to a long-awaited public health standard limiting poison levels in California drinking water neared its final step Monday at a hearing that drew clean water activists such as Erin Brockovich to the Elihu Harris State Building.
The poison in question is hexavalent chromium, also called hex chrome or chromium six, given notoriety in the film bearing Brockovich's name. Hex chrome is a carcinogen long known to cause cancer through inhalation but only recently recognized by the federal government as dangerous to drink. Before there was controversy over whether stomach acids converted the chemical into a related, nonpoisonous nutrient, researcher Gina Solomon said.
Before the state can set standards about how much hex chrome is allowed in drinking water, researchers need to determine what level is dangerous: a figure researchers at
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