Winding its way through forests of conifer and aspen, cottonwoods and sycamores, the Gila River descends out of the nation’s first wilderness area, designated in 1924. For almost a century, a U.S. Geological Survey stream gage just below that boundary has tracked the river’s flows.
Now, samples from that spot reveal the presence of toxic per- and polyfluoroalkyl substances. Read more…
