This idea isn't mine. Credit for this one goes out to the Buckeye Trail Association's maintenance supervisor. And it wasn't until recently that I had the capability to put it all together. This data is for The Wilderness Loop only and been on the "to do list" for a while.
Is every stream contaminated? Well, I'm not a scientist, so I don't want to make such statements. I noted the location of every stream. Many of them are probably perennial. I marked the ones with mines along, or on one of their branches in red. Even in on a hand GPS, some won't read the icons, so their names read that "Do Not Filter Here."
In a nutshell, there are certain places the hiker shouldn't filter water from. They are:
AEP Recreation Land
Little Muskingum River
(including the Clear Fork Little Muskingum River)
The West, Middle and East Branches of the Duck Creek
Road Fork Section, Pts. 04 - 07 (present day map & guide)
According to my data, Whipple 13 - 24 (10/2010 map & guide) can be a hit or miss... mostly miss. In any event, if the hiker assumes the risks involved. And they'll need data like mine to plan where they're going to filter water. Concerns about mining and it's effect on surface streams have been going on since before the trail in this area was born.