RadGnar, you're certainly welcome to filter or treat if you want to, but some of us don't. That spring is fed by snow melt from high above the switchbacks, in an area nobody travels. There is a similar spring just east of Outpost Camp, right by the trail.
Actually, I'll dip and drink from most streams along the Main Trail. The one place I draw the line is the pond at Trail Camp. I walk over to the inlet and dip from that stream.
You can find links to more reading under "Water discussions" in the "
Links to important Whitney information" post, and decide for yourself.
