Second Quarter/YTD 2023 Results

Investments Drive Continued Rate Base Growth ($ in billions) 8-9% CAGR for Rate Base I I I | Estimated Rate Base* AMERICAN WATER As of 12/31/2022 $23.2 $17.8 Net Utility Plant I $16.3 $15.0 Less $13.7 I I $12.5 Advances for Construction $0.3 $11.6 $10.7 I | CIAC Contributions in Aid of Construction $1.5 Net Deferred Income Taxes $3.6 I $5.4 I Total Estimated Rate Base $17.8 2016 2017 2018 2019 2020 2021 2022 I 2032 Note: annual rate base totals include New York American Water through 2021. New York's 2021 rate base was $0.5 billion. * An approximation of rate base, which includes Net Utility Plant not yet included in rate base, pending rate case filings/outcomes. 9

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