Dedicated to Satisfying Our Community’s Water Needs We provide safe, high-quality drinking water to residents and businesses in Costa Mesa, parts of Newport Beach, and areas of unincorporated Orange County. Mesa Water is committed to the highest standards for customer service, water awareness and conservation, reliable water delivery and financial leadership and transparency. We’re dedicated to serving you! Clear, abundant, safe water is essential for the quality of life we have come to expect in Orange County. Since 1960, Mesa Water has been providing clean, safe, reliable drinking water at a reasonable cost to the people we serve. We strive to deliver high-quality drinking water to your tap, maintain a safe, reliable water infrastructure and system, and provide excellent service to ensure customer satisfaction. We supply water to 110,000 residents in an 18-square-mile area. The service area includes Costa Mesa, parts of Newport Beach, and some unincorporated areas of Orange County, including John Wayne Airport.