Straw man city wrote:
His point is still accurate. Water does not disappear like a fossil fuel. It stays in the form of water, somewhere.
Again, start to read up on the water infrastructure, water treatment process and you will realize where the waste is.
First, consider the drought that California was experiencing for some years.
https://ca.water.usgs.gov/data/drought/If you are running an unnecessary amount of water on your lawn so you and Mr. Jones next door can see who has the greenest grass in Suburbiaville, you are taking away from what little water is available in the reservoirs. And like in California, the water doesn't directly flow back into the reservoirs that feed your super high tech lawn irrigation system. It goes elsewhere. Then you and Mr. Jones are f***ed, along with the rest of the community, who is now rationing off water because the reservoirs did not refill.
If you solely consider water as the waste, then sure, in conventional wastewater treatment plants and septic systems (with leach field), water is returned to the environment. And maybe that water magically rejuvenates the reservoirs every day.
But that is in a perfect world where the wastewater treatment plant and your septic system functions as engineered. Unfortunately, most of that isn't maintained well and produces low-quality effluent full of crap other than water. So you aren't getting potable, clean water back into the system.
Then start to consider the wear and tear on the pumps, pipes, equipment, etc. So we don't end up in the crapper, assets need to be replaced. Where does that money come from? Same number of taxpayers in the community + more water usage = higher taxes for the community.