Prepare the Lemon Balm: Gently wash the lemon balm leaves under running water. Lightly bruise them with your fingers to release their natural oils.
Combine Ingredients: In a large pitcher, add the lemon balm leaves, filtered water, and lemon slices if using.
Infuse: Let the mixture sit at room temperature for at least 30 minutes or refrigerate for a longer infusion (up to 12 hours for stronger flavor).
Serve: Add ice cubes if desired and stir gently. Strain before serving if you prefer clear water.
Enjoy!: Serve in glasses and enjoy this refreshing, herbal-infused water.