Sparkling water can count toward water for the day, but I try not to make a habit of it. It’s okay to do occasionally, but not as an everyday drink, especially on protocol. Carbonation is created by pumping carbon dioxide into water. Carbon dioxide (CO2) is a waste product of cellular and food metabolism, as such the body wants to expel it. So drinking carbonated drinks will actually add a waste product to your body. Carbonated beverages are also known to weaken our stomach acid, which interferes with proper digestion.
If you really need/want to drink sparkling water, make it the Perrier brand. This brand has naturally occurring CO2 in it, as opposed to other sparkling waters which have synthetic CO2 added to them.
As always, watch for added ingredients that should be avoided – sugar or artificial sweeteners, artificial flavors, etc. Some brand even have added salt, which can cause water gains/bloating.