1 c. cold water
1 c. granulated sugar
1 c. freshly squeezed lemon juice
1 1/2 pints sparkling water
Put the cold water in a medium sized pan with 3/4 c. of the sugar. Bring to a boil and then simmer for 3 minutes. Add the lemon juice and reheat briefly. Taste and add the remaining sugar, if desired.
Allow to cool.
When cold, pour the syrup into a pitcher and add the sparkling water. Chill before serving.