Customers in San Diego County cut back on water consumption by 23 percent in April, compared to the same month three years ago, marking the largest monthly reduction since September, the San Diego County Water Authority reported Monday.

The state-mandated target for the county as a whole is to reduce consumption by 13 percent compared to the corresponding month in 2013. The goal was lowered recently from 20 percent after the region was given credit for bringing a desalination plant in Carlsbad online.