There's a general suggestion in the medical community that the widespread use of antibiotics is increasing the number of antibiotic-resistant bacteria, through evolutionary pressure. But bacteria with antibiotic-resistant genes have been discovered a mile below the earths's surface. What we don't realize is that bacteria aren't just sitting out there scheming how to do us in, they're engaged in all-out warfare with other bacteria, so, if in a particular environment, like a hospital, we kill off all the bacteria vulnerable to a particular class of antibiotics, others which are antibiotic-resistant will rush in to take their place.
So use of Aquamira wouldn't somehow create a race of monster pathogens; if we flooded, for example, the Appalachians with Aquamira, aquamira-resistant pathogens would take the place of the pathogens killed off by Aquamira. But that's a far cry from hikers filling their bottles with Aquamira-treated water which won't re-enter the environment until after we've metabolized it.