Water is an interesting part of this. I grew up on well water and currently have a well. I would put money on it that those that have wells conserve more water than those that do not. We know that water is not an endless supply. I live on 5 acres and have 2 wells. A previous owner had horses and added the barn and 2nd well. I can't remember the last time other than a monthly clear out the lines that the second well has ever been used for the house. I don't think we have ever flipped it over and we use the main well for the pool, gardens, etc.
Hihope Hiland Heathen of Perth CD, RE, CGC, TDI