I don't think any effort was made to cap the wells around Alluwe. I wonder now, if I was lucky not get sick from swimming in Double Creek Cove. My current water supply comes from Aurora Reservoir, which is just south of the old Kiwry Bomb Range. That's a Superfund site. I think Colorado has a number of Superfund sites associated with the defense industry. I believe we also have a higher amount of naturally occurring radon here.