Due to an unexpected reduction in imported water from the Metropolitan Water District of Southern California (MWD), the City of San Diego was obligated to dip into its local water supplies to continue service to customers.

On Tuesday morning, algae clogged a filter screen on a major pipeline, causing an interruption in raw, untreated water from MWD to the San Diego County Water Authority. MWD cleared the pipeline that morning and full deliveries resumed by early afternoon. The City of San Diego purchases its imported water from the County Water Authority.