The Metropolitan Water District of Southern California

Metropolitan built and maintains a water supply system that is the cornerstone of the region’s $1 trillion economy. As the nation’s largest municipal water provider, Metropolitan owns and operates five separate treatment plants, among the largest in the world. The district’s complex network of pipelines and facilities consistently delivers high quality water throughout its 5,200 square mile service area. Rigorous maintenance and regular capital investments ensure Metropolitan’s customers benefit from reliable service and advancements in water supply and water quality technology, including state-of-the-art treatment upgrades.