Hare Krsna,
I will now direct you to a proper medical faculty, 'Medical school,' that published it's finding on the 'Do we overdose on water?' It's findings make sense to me it discusses the eight by eight rule.
It will answer all your questions about 'Am I drinking too much water?' Basically what it does say and I agree is that this 'drinking water business' is a habit, fad, braught about by the nutritionalist boards. We get water from food anyhow and when we do become dehydrated our bodies will let us know in various ways. We don't need to purge ourselves with 'Gallons' of water!!
Anyway here's the link for you to read it from the real McCoy
www.dartmouth.edu then go onto the DMS news it's all there about your water 'Myth.'