BOSTON — Tests of surface water found a toxic brew of “forever chemicals” in the state’s major rivers and tributaries, environmental officials said Tuesday.

The tests, conducted last fall by the U.S. Geological Survey, found per- and polyfluoroalkyl substances in each of the 27 rivers and brooks sampled for the substances, which have been used to make products from frying pans to firefighting foam.

In many cases, levels exceeded the state’s standard for drinking water of 20 parts per trillion.

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Photo Credit: Ken Gallagher