Reducing Reliance on The Bay-Delta
The Sacramento-San Joaquin Bay-Delta is a network of islands and waterways at the confluence of the Sacramento and San Joaquin rivers east of San Francisco Bay. The Bay-Delta is also the hub of the State Water Project, a water storage and delivery system stretching over 700 miles from Lake Oroville in Butte County to its termination at Lake Perris in Riverside County. The State Water Project is owned by the State of California and operated by the California Department of Water Resources. Water from the Bay-Delta comes to the San Diego region via the State Water Project through the Metropolitan Water District of Southern California.
The Water Authority has a long history of supporting efforts to address the Bay-Delta’s complex environmental and water supply challenges. While water from the Bay-Delta is a critical resource for more than 25 million Californians, San Diego County is doing their part by reducing reliance on it.
Dig deeper, learn moreCalifornia Department of Water Resources Site
Water Resilience Portfolio
The Water Authority’s only source of Bay-Delta water is through its water purchases from MWD, which have decreased over the past three decades through the Water Authority and its member agencies’ long-term efforts to diversify the region’s water supply portfolio. Today, the San Diego region receives very little water from the Bay-Delta and will continue to reduce its reliance on it. Reducing pressure on the Bay-Delta aligns with state law designed to balance the environmental and water supply functions of the estuary.