Read previewAt least 75 of Alaska's brooks and streams have been turning a dirty orange likely due to thawing permafrost, with some rivers so impacted that the discoloration can be seen via satellite, a new study says. Rivers and lakes typically have a pH value of 6.5 to 8, and acid rain has a pH value of 4.2 to 4.4. Jon O'Donnell/National Park Service"These findings have considerable implications for drinking water supplies and subsistence fisheries in rural Alaska," researchers wrote. The 75 orange streams observed were scattered across northern Alaska over a span of about 600 miles, the study said. AdvertisementAn orange tributary joins the Kuguroruk River in Alaska.

---

Persons: —, Jenny McGrath, Jon O'Donnell, Joshua Koch, Biden Organizations: Service, Business, Geological Survey Scientists Locations: Rivers, Kobuk, Alaska