Mix water, sugar, lime, and orange juice in a sauce pan. Bring to a boil and stir to completely dissolve sugar (should result in just over 2 cups of simple syrup).
Place syrup mixture in refrigerator to cool completely.
Mix kombucha and sparkling water together. Add 1 cup completely cooled syrup (the rest can be stored in a sealed jar in the refrigerator) and stir.
Add mix with ice cubes to blender, adding more ice as you blend, until almost the consistency of a "slushy."
Use lime garnish to wet rim of drinking glasses, turn upside down in salt to salt rim. Fill glasses and enjoy!
Recipe by Autoimmune Wellness at https://autoimmunewellness.com/aip-margarita-mocktail/