The Marin Municipal Water District is revisiting the possibility of constructing a desalination plant, this time taking a closer look at the cost to produce drinking water during a drought. The reason for the focused cost analysis is because while a desal plant could provide a great supply, the district has limited storage capacity … The district launched a study into new water sources in 2022 after facing potential reservoir depletion from the drought. Rains in late 2021 nearly refilled the district’s reservoirs, giving the county’s largest water supplier more time to study the costs and benefits of potential new sources of supply. The resulting study is the water supply roadmap that was approved last year. In addition to desalination, the plan explores expanded recycled water opportunities, conveyance and storage.