Officials in Beverly Hills say they tried it all: educational campaigns, usage restrictions and written notices for people suspected of wasting water. Despite those efforts, the community missed its savings target every month since June, when a statewide 25% reduction in urban water consumption became mandatory amid the punishing drought. As a result, state regulators fined the city, saying publicly that its water wasters "should be ashamed." About four months ago, city officials got tough. Beverly Hills sent letters to dozens of customers in November warning them of high water use and urging them to cut back. The city also...