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Perchlorate in California's Drinking Water
California and Massachusetts are the only states that have set enforceable drinking water standards for perchlorate in drinking water. Both states acted because there is no federal standard for this contaminant, despite the fact that it has been found in hundreds of drinking water sources at harmful levels across the U.S. While California has shown great leadership in analyzing the dangers of perchlorate and regulating the chemical in drinking water, Clean Water Action and its allies in the environmental community have long contended that its standard of 6 parts per billion (ppb) is not