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.
Above Ground, Marcellus Salts Put Water at Risk