Over consumption is a serious issue, especially in countries like the US. More is not always better. We're creating so much waste whilst using up resources.
I'm not sure we really need that much water unless it's seriously hot. I don't drink anything like 3 litres each day. I'm including coffee and juice in that.
I've tried drinking 3.7 liters in a day and found that it sort of loaded me up, it felt like a burden. So I'm just going to see what my comfort level is and be consistent with that. So far, it's at about 2-3 liters of water a day, not including any fruit I might eat.