In a small saucepan, combine 1 1/2 cups water with the sugar and salt. Heat over medium high until the sugar and salt dissolve into a sweet and salty simple syrup. Place in the fridge to cool. Make a little over 2 cups.
Muddle (smash to smithereens) the berries in the bottom of a pitcher.
Squeeze the limes into a pitcher and add the chilled simple syrup. Pour in the addition water of seltzer water and stir.