While El Niño has put a dent in California’s historic drought, conservation efforts by urban water users in the state have tapered off in recent months — a trend reflected in San Diego County.

Regulators announced Monday that residents and businesses didn’t meet Gov. Jerry Brown’s mandatory statewide conservation target of 25 percent — on both a monthly and cumulative basis. The customers failed significantly in February, the most recent month for verified data. It was by far the worst monthly showing since the program began last June.