You can’t water your lawn more than twice a week in the city or Sacramento during summer, and never on Thursday or Friday. For thousands of Sacramento County residents, the limit is three days a week. In Roseville, there’s no watering between 10 a.m. and 8 p.m. Customers of the San Juan Water District have five days to fix leaks, and hosing down the driveway or sidewalk is off-limits in Elk Grove. Long before Gov. Gavin Newsom declared a drought emergency for the Sacramento region — and much of the rest of California — area residents were already dealing with an assortment of restrictions on water consumption, depending on their supplier.