Water... really?

Carying a full pack with all season gear plus food for a week is quite a workout that would make you break a sweat for sure... well, usually I'm soaked, driping all over, especially with the sun and heat around mid-day. But not this time. Thanks to the very dry climate, burning sun and strong wind drying me quickly... or should I say dehydrating. So it's nice to get to some water to refresh and refill the bottles... but is this really water?