Depends on humidity in the air, the damper the day the more water and is especially prominant in the summer....
Monitoring water levels really doesn't help unless it's a massive loss of water. If you want to be sure, then the next time there's a puddle then dip your finger in it, now you can do a couple of things the first is taste it....but there's always the chance it's battery acid...so probably not good advice unless you know what you're looking for. Alternatively smell it, if it's odourless, it could be water or radiator coolant, if it's sweet and strong it's screenwash, if it's eggy and burns to inhale then it's battery acid (I doubt it is!)...now go and wash your hands /ubbthreads/images/graemlins/grin.gif if it's odourless then colour should give it away as to what it is and if not then rubbing between your fingers will tell you, with coolant creating a filmy wax feel between your fingers. /ubbthreads/images/graemlins/snore.gif
After all of that I'll think you'll find it's just water and if so then it's from the CC and is perfectly normal /ubbthreads/images/graemlins/beerchug.gif
I really don't have a life...... /ubbthreads/images/graemlins/grin.gif