Streams in Alaska are turning orange with iron and sulfuric acid. Scientists are trying to figure out why

Increase in sediments such as iron could change quality of water sources for local communities such as Kobuk and Kivalina. The impact on animals and plants are unknown and researchers are aware of potential changes in the food web in the future.

Red water - nickel processing plant says cause is decades of contamination in Soviet times which company is working to overcome.

Ruben Henry won't ever forget the day the Chandalar River ran red along the banks of Arctic Village. It was the talk of the tight-knit, Brooks Range town, and no one had could remember it ever happening before.