California Regulates Third ‘Forever Chemical’ in Drinking Water | Bloomberg Law

March 5, 2021
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California water regulators are requiring water suppliers to shift wells offline, blend sources, or notify customers when they detect a third “forever chemical” at certain thresholds.

The State Water Resources Control Board issued an order setting a response level of 5 parts per billion for perfluorobutane sulfonic acid (PFBS). Water suppliers will also be required to notify customers, the state, and others when samples of PFBS exceed 0.5 parts per billion.

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