Here are some slogans which u can use :

Don’t let the water run in the sink, our life’s on the brink!.

Slow the flow of H20 !

Do your part to be water smart !

Waste water today and live in the desert tomorrow !

Water, Water everywhere. Try to save it if you care !

And I'm also giving u pics for ideas.

pls pls pls mark as best. I need brainliest answers to become virtuoso and nobody marks my answers as best :(