Water agencies across California are relaxing water use restrictions imposed last year because of the drought. In many places, about half of a household’s water usage goes to caring for a lawn. During the drought, the state prohibited people from watering their lawns more than twice a week. Those restrictions are loosening, though, and people can now return to watering their lawns more often, but keeping track of what’s allowed can be tricky since there’s about two dozen different water agencies in the county and a patchwork of rules.