There is a difference between ozone generators, and UV purification.

Ozone generators use UV along with a catalyst to create ozone from oxygen already in the water. The ozone is an oxidant and will disinfect water just like chlorine.

UV purification involves direct exposure of microorganisms to the UV light. The direct effect of this is to sterilize the organism, which for all intents and purposes destroyes them because the lifespan of most organisms are fairly short.

I had previosly not actually gone to the Klimatec website, because then I would have noted that the schematics show that the water passes through a Reverse Osmosis (R/O) membrane before the UV. No bacteria could possibly pass through the membrane unless the membrane is in a failure state (which may occur quickly with a high bacteria load). I would have designed it with the UV before the R/O and probably would have skipped the R/O completely as airborne water would have extremely low dissolved solids anyway.

UV Light does not kill bacteria it steralizes it. The bacteria keeps living in the water you will be ingesting, but can not reproduce.

And it is so easily transported by helicopter to any lake you desire.