Second Quarter/YTD 2023 Results

Timely Recovery of Capital and Operating Costs AMERICAN WATER 2 1 American Water's Jurisdictions 10 10 As of 2010 As of 2022 11 11 10 5 5 7 1 6 6 Revenue Stabilization Infrastructure Mechanisms Expense Mechanisms Consolidated Tariffs Fair Value Forward Looking Test Year Capital Recovery (2023-2027 Plan) Infrastructure Surcharge Mechanisms =45% Forward Test Years =30% Traditional Recovery =25% 10 10

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