I saw a whole lot of untested water this year, long before you get to your “toxic” areas, I guess. Some folks think if the State has a “drink at your own risk” boil water sign posted that the water is unsafe to drink. I haven’t been checked for excess in minerals or dirt from the day my filter blew and I had to drink hot, slimy, sandy pond water for about 9 miles.
I am told that filters such as the one I used, PUR/Katahdyn does not filter out the polutants such as gasoline and oil runoff from roads. Down in Pearisburg, I don’t remember the orange creek, but I do remember that industrial complexes are really not too far removed from the AT.
I would check with SOBO hikers about water, when I was a worry wart about water. The fact is, I hike fast enough to get to the next water source that is reliable, and tasty.
Drinking right out of snow runoff just past Mountain Mommas was the greatest tasting water in the world. Use your best judgement. After all, you will know.
Burn