Earlier quoted context omitted.
At home I have a 1:1 ratio. I've got my own well and my own pump, so every liter of water I get out of the well flows out through my tap. I guess you could argue that the electricity needed to work the pump may be produced by means that waste water.
The mine that dug the iron that made your pipes contaminated a lot of water. In the vegan world its standard to count every drop of rain that hit the livestock pasture as being used, therefore its fair to count the rain that ran off the factory roof where the pump was manufactured as used. Wells don't dig themselves and although that doesn't happen often, it does take a lot of water to do it, and make the gear to do…
Do you have any sources for this? I have never heard a vegan claim this once.