Patricia Mulroy will kick off the National Ground Water Association Summit May 6-10 in Garden Grove, Calif. Mulroy oversees the Las Vegas Valley Water District, which serves more than 340,000 customers; and the Southern Nevada Water Authority, which acquires, treats, and delivers water to local agencies that collectively serve 2 million residents and nearly 40 million visitors every year. (By the way, National Groundwater Awareness Week is March 11 through 17.)