Add lemon zest, granulated sugar and sea salt to the bottom of a half gallon pitcher.
Muddle and mix with a long wooden spoon to release oils and well combined.
Add lemon juice and orange juice to the sugar mixture and stir until dissolved.
Drop in your herbs if using, and gently press against the side of the pitcher to bruise lightly to release the flavor.
Top off with the water and stir to combine.
Add the lemon slices and reserve a few for garnish.
Chill if desired or pour immediately over ice in a tall glass.
Add lemon slice and herbs as a garnish if desired.