State regulators have begun reviewing a drinking-water standard for a common inland contaminant. The California Office of Environmental Health Hazard Assessment will review the public health goal for perchlorate - an ingredient in explosives and some fertilizers - in 2009, said the office's deputy director for external and legislative affairs, said Sam Delson via e-mail. The public health goal is the first step in setting a drinking-water standard. Environmentalists, who complained the last public health goal of 6 parts per billion set in 2004 was too high, welcomed the news. One part per billion translates into a drop of water...