I can give only my personal opinion. The problem of the water is a social problem and not a scientific problem. I think that the water must be a public goods like the air. If the water will become private , necessary will be subject to the economical rules with the consequences that you can , easy, imagine.
The same topic has been discussed here: https://www.researchgate.net/post/Should_the_water_sector_be_managed_by_private_or_public_entities#view=5630c2f05dbbbdbb238b4580