Part 5. Changes In Organization of California Water Code >> Division 16. >> Part 5.

Any portion or portions of a county containing unincorporated territory, or containing the whole or any portion of one or more incorporated cities, and not included in a district, may be added to any district as prescribed in this chapter.

Territory within the same county but not contiguous with the district may be annexed to the district if the board determines that the district resulting from the annexation may be more efficiently and economically operated than if a separate district were formed. No parcel of noncontiguous territory which contains less than 10 acres may be annexed to any district.