The San Francisco Bay is a critically important water body to the San Francisco and the Central California economy. It has numerous industry and urban areas along its length raising interest among researchers, industry and the environmental regulatory community.

San Francisco Bay is a shallow estuary that drains water from approximately 40% of California. Water from the Sacramento and San Joaquin rivers, and from the Sierra Nevada Mountains, passes through the bay to the Pacific Ocean. Specifically, both rivers flow into Suisun Bay, which flows through the Carquinez Strait to meet with the Napa River at the entrance to San Pablo Bay, which connects at its south end to San Francisco Bay. However, the entire group of interconnected bays is often called the San Francisco Bay (Wikipedia).

This grid contains 9,983 cells, with an average orthogonal deviation of 1.20 degrees. The grid stretches from Carquinez Bridge to the Pacific Ocean. This grid was built in multiple stages and joined to together to make one complete grid in EFDC+ Explorer and Grid+.