Voluntary never works. There are just too many people that don't care and aren't willing to change. Mandatory will only make people mad and a subset will do th

Voluntary never works. There are just too many people that don't care and aren't willing to change. Mandatory will only make people mad and a subset will do their best to fight it. The fix is to hike the costs and rebate to those that actually save and those under a certain income or charge a lot more once a household or business uses more than a certain amount of water.