They're often found in seawater, but bromides are now making it into Pittsburgh's rivers,
courtesy of Marcellus Shale fracking water.
These salts are usually safe for people--until they flow into a water treatment plant.
The Allegheny Front's Reid Frazier looks at why the state wants to keep these usually benign salts out of our taps.
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Above Ground, Marcellus Salts Put Water at Risk
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