My group has been using the water pump since the start of the season. Which started May Long weekend for us! We have been out every weekend, to a different place all mostly in the Alberta Rockies though. We have pumped all of our water, even in flood run-off season where we know there have been cows.

I wouldnt want to jinx myself, but we haven't been sick at all. I think the most sick we were was from the hang-over from the scotch...