State water officials probe source of Barstow contamination

Investigators are testing wells to determine how high levels of perchlorate, a chemical used in rocket fuel, got into the region’s water supply. The crisis response has cost about $100,000 so far. State water officials launched an investigation Tuesday into how a chemical used in rocket fuel and munitions found its way into Barstow’s residential water supply, as costs to address the crisis mounted.

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State water officials probe source of Barstow contamination