Ingredients

• 8 cups water, divided
• 5 cups peeled, cubed, and seeded watermelon
• 1/2 cup white sugar, or more to taste
• 1/3 cup lime juice, or more to taste

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Instructions

1. Combine 1 cup water, watermelon, and sugar in a blender; process until smooth. Pour into a large pitcher; stir in lime juice and remaining 7 cups water. Taste; adjust sugar or lime juice. Refrigerate until chilled, about 1 hour.