Where Lawns Are Outlawed (and Dug Up, and Carted Away)
nytimes.com
nytimes.com
Not necessarily. Water prices are regulated anyway, so the rule could be something like "the first 3,000 gallons per person per month are at today's prices, and the rest of your usage is at desalination prices", or "you can choose whether your water source is cheap Lake Mead or expensive desalination, and water conservation rules only apply to people who pick the former".