Encinitas City Council member Mark Muir, who has represented the San Dieguito Water District on the San Diego County Water Authority Board of Directors since 2013, has been elected as the new board chair of the county organization. Muir follows two years of Mark Weston (Poway) leading the board of the Water Authority, which sustains a $222 billion regional economy and the quality of life for 3.3 million residents through a multi-decade water supply diversification plan, major infrastructure investments and forward-thinking policies that promote fiscal and environmental responsibility, according to a news release.