Stupid question, treating melted snow?

I didn't treat the melted snow in the Sierra last year, and as far as I know, none of the 15 people in my snow camping group got sick.

Yes, I did add snow to my nalgene during the day. Just don't get crazy or you end up with a slushy. I suppose the effectiveness of that would depend on the air temps, unless you have a method for carrying the bottle close to your body. It was always in the mid 20s to 30s when I was snow shoeing.

I have never treated my melted snow, nor do I know anyone who does. In fact, when I am on a backcountry ski trip I also do not treat any running water I may find. Noproblems yet! I doubt that ther is liekly to be any bacterial or viral contamination of snow on the ground, with the exception of summer snow with that reddish tinge in ti, which is an algae, I believe. New-fallen snow is essentially distilled water – it had to eavporate to get into the clouds, after all. I suppose it could pick up some chemical pollutants while in vapor form, but if it does, then I'm breathing that same stuff, I suppose.
And yes, I do add snow to my bottle during the day, and I also just grab a handful of snow as I plod along, Or if I am lucky I get to lick the fresh stuff off the needles of a pine tree. That's the best.

Nope, don't treat snow either. But don't drink snow that is discolored. In the spring, a red/pink/orange tint in the snow means that it's unsafe to drink. And of course, don't drink yellow snow!

A different thing that I think of when drinking melted snow… The air pollution that it contains. Snow, like rain, forms around particulate matter. Sadly, especially in places like California, those particulates are often nasty pollutants.

As long as the snow isn't yellow, I don't bother treating it.

Thanks for the replies everybody, I'll figure this snow camping thing out soon enough.