That is why making mead with room temperature water to me is a bit like... uuuh...
will it be OK if not boiled?
But gotmead.com says either boiling or doing it with room temperature water will give suitable results... And if you buy bottled water and use the original packaging there should be very little in the way of germs? Spring water should have been bottled in a clean environment...
There are some separate schools on the matter.
Some will absolutely not boil the water and especially not the honey.
The honey itself, if it's not processed, will contain loads of pollen, so I always boil it.
Also it comes down to your tap water if you use that, the water in Sweden tends to be very clean, and very low on chlorine. Sure there are some minor bacteria living in it, but nothing that will make you sick or ruin your brew.
To be certain though, I always boil the water, unless I need to dilute the wort or honey mix before I start fermentation, then I use tap water straight to the bin.
If you were to use spring water I'd think you can use it without boiling for sure. Then again, if you use the honey as is without boiling, the water will not affect much since you'll have so much stuff in the honey anyways.
Mead seems to be far less sensitive compared to beer though, one part may be since a lot of brewers use wine yeast and another might be that the honey and water mix is less attractive to wild yeast spores than the beer wort.