The Water Authority Monday reminded San Diego County residents that it is illegal to water landscapes within 48 hours of this weekend's rainfall.
As a practical matter, the unusual amount of rain means lawn irrigation won't be necessary for a much longer time since the ground will retain some moisture.
The storm should make it easier for residences and businesses to meet state-mandated water conservation targets. Local water agencies throughout California have been ordered to substantially reduce consumption — in San Diego County, the targets range from 12 percent to 36 percent.
"The region took advantage of the May rainstorms to really drive down water use, and this weekend's downpour will help our region maintain its early success in meeting the state's water-saving mandates if everyone takes full advantage it," said Jason Foster, director of conservation and public outreach for the Water Authority.
"We've still got some of the hottest and driest months of the year ahead, so we've got to continue to save in every possible way," he said.
Water customers are also required to limit their lawn watering to twice a week at no more than five minutes per station, and not after 10 a.m. or before 6 p.m.
Compared to the same months in 2013 — the measure being used by state water officials for their conservation targets — San Diego County customers have cut back water use by 30 percent in May and 26 percent in June.