California Moves to Regulate Perchlorate California is the first state to move toward regulating perchlorate, a rocket-fuel ingredient that has tainted drinking water in many states. Perchlorate can cause thyroid disorders. Safety guidelines were issued Thursday, despite opposition from the Pentagon and military contractors -- the source of most perchlorate pollution. NPR's Carrie Kahn reports.

California Moves to Regulate Perchlorate

California Moves to Regulate Perchlorate

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California is the first state to move toward regulating perchlorate, a rocket-fuel ingredient that has tainted drinking water in many states. Perchlorate can cause thyroid disorders. Safety guidelines were issued Thursday, despite opposition from the Pentagon and military contractors — the source of most perchlorate pollution. NPR's Carrie Kahn reports.