How long does fresh water stay fresh?
I haven't seen this bantered about or discussed, (couldn't find it in a search either), so here goes. I have never dry camped for more than a couple of days but anticipate doing a lot more of it. A...
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There are a lot of variables--how pure the water is to begin with, how warm the temperatures are, how many nasties are floating around in the air in the area (as the water tank obviously cannot be airtight), etc. Generally, though, I personally would not start worrying until maybe a month or so, which generally means that it's a moot point if one's staying in the RV as the water usage will ensure it gets cycled through (if imperfectly) a lot more frequently than that. For my two and a half month Alaska trip last year, I sanitized before leaving and just filled from potable water sources as needed for the rest of the time...and had no difficulties. I didn't use bottled water, just drinking and cooking with the tap water.
