Second Quarter/YTD 2023 Results

American Water's GHG Emissions Profile Providing Services to 14M People with a Light GHG Footprint AMERICAN WATER American Water Co. A 83M Co. B 78M Stationary Scope 1: Direct Emissions Scope 2: Co. C 57M Fleet Vehicles 76,000 MT Co. D Refrigerants 43M Co. E 40M Purchased Power from Electric 459,000 MT Co. F 36M Indirect Emissions Providers Co. G 35M 2021 Scope 1 and 2 Subtotal First Time Disclosure 535,000 MT Co. H 28M Co. I 26M Co. J 25M Purchased Goods and Services Scope 3 (2021): Co. K 22M Capital Goods Up and Down 506,000 MT 1 Value Chain • Fuel & Energy-Related Activities Business Travel Co. L 17M Co. M 11M 1 Represents initial estimate based upon work with third party consultant, including identification of significant scope 3 categories Co. N 7M Co. O 5M Co. P 5M 20% Category 1: Co. Q 4M AWK emissions are only 0.1% of the total emissions generated by the top 20 utilities* Purchased goods and services Co. R 2M Scope 2 44% 49% Scope 3 Category 2: Co. S 0.7M Capital goods AWK 0.5M 49% Category 3: 31% Fuel & energy-related activities Scope 1:7% Category 6: Business Travel (<1% of Scope 3) ■2021 Scope 1 and Scope 2 MT CO2e (Rounded) * Chart represents emissions for the top 20 U.S. utilities by market cap, sorted by emissions ESG ESG™ at AWK 41

View entire presentation