Surely if we drank 15 glasses of water a day we would spend most of the day in the cr
The needed daily requirement for a decent balance will obviously vary depending on the individual and such factors such as climate, physical activity and also age.

The European Food Safety Authority states that:-

Adequate total water intakes for females would have to be 2.0 L/day (P 95 3.1 L) and for males 2.5 L/day (P95 4.0 L). The Panel defines the same adequate intakes for the elderly as for adults. Despite a lower energy requirement, the water requirement in the elderly per unit of dietary energy becomes higher because of a decrease in renal concentrating capacity.
Interesting stuff.
If we said that the average glass of water is around 200ml then that equates to around 10-12 glasses per day

My daily intake of water here in Davao City is significantly more than the EFSA indicator of 2.5 litres and really I don't find myself in the CR so often as to be an issue. Just normal really.

Passing clear urine is a good sign that your body is in a good fluid balance.