[fulafel]

Water based toilets and watered lawns aren't used in places with shortage of drinking water. (Except in places with high inequality where an upper class can afford to use water in toilet but lower class can't afford to drink it)

[wehadfun]

Is there a toilet that isn't water based? Or are you talking about using tree/hole/... as toilet?

[fulafel]

Yes, UDDT toilets work so well that environmentally conscious people install them in homes even in places with good access to water. https://en.wikipedia.org/wiki/Urine-diverting_dry_toilet

In arid third word countries people have low tech outdoor arrangements like pit toilets.

[fizgig]

Composting or incinerating toilets.

[kwhitefoot]

You mean like California? :-)

[fulafel]

Afraid I don't know enough about California to get the joke, do you mean tap water is too expensive for the poor there?

[kwhitefoot]

I mean that the way California is going that water will be in short supply there.