The Marin Municipal Water District is bolstering its strategy on conservation with policy updates and incentive programs designed to reduce water use by hundreds of millions of gallons annually. The draft “2024 Water Efficiency Master Plan” is a playbook that outlines how water is used today in the county, and how the district can help its 191,000 customers in central and southern Marin cut back. The plan aims to reduce water use districtwide by more than 1,000 acre-feet a year starting in 2025, with even greater incremental reduction targets beyond that. An acre-foot is about 326,000 gallons of water. District staffers presented the draft plan to the board at a special meeting on Wednesday.