I’m not sure why Nevada is always brought up negatively when mentioning CO river usage but Nevada uses the least amount of water out of all states:

https://www.snwa.com/water-resources/where-water-comes-from/...

https://www.snwa.com/assets/images/colorado-river-allocation...

For indoor usage in Las Vegas for example, it recycles 99% of it:

https://lvgea.org/water/

Using water in the desert is a problem, but point to CA or AZ as poster children of abuse for that