Letter Agreement, dated June 29, 2021, by and among the Company, the Companys New York subsidiary, and Liberty, with respect to the Stock Purchase Agreement

June 29, 2021

Liberty Utilities (Eastern Water Holdings) Corp.

c/o Algonquin Power & Utilities Corp.

14920 W. Camelback Road

Litchfield Park, AZ 85340

Attention: Todd Wiley

E-mail: todd.wiley@libertyutilities.com

Ladies and Gentlemen:

Reference is made to that certain Stock Purchase Agreement, dated November 20, 2019 (the "Existing Agreement") between American Water Works Company, Inc., a Delaware corporation (the “Seller”), New York American Water Company, Inc., a New York corporation, and Liberty Utilities Co., a Delaware corporation (the “Purchaser”),1 and capitalized terms used and not defined herein shall have the respective meanings assigned to them in the Existing Agreement.

Pursuant to Section 9.1(b) of the Existing Agreement, if the Closing has not occurred on or before June 30, 2021, the Existing Agreement may be terminated, unless either the Purchaser or the Seller opt to extend the Closing End Date to December 31, 2021 by providing written notice to the other party. As such, by executing this letter agreement (“Letter”), the Seller and the Purchaser mutually notify each other of their respective intent to extend the Closing End Date from June 30, 2021 to December 31, 2021.

Simultaneous with this election, given that December 31, 2021 is a federal holiday, each of the Purchaser and Seller would like to modify the Existing Agreement pursuant to Section 11.11 to change the definition of the Closing End Date from December 31, 2021 to January 3, 2022.

Pursuant to Section 11.2 of the Existing Agreement, by executing this Letter, each of the Purchaser and Seller provide written confirmation of receipt of this notice and make the following acknowledgements: (i) that, other than the conditions to Closing set forth in Section 6.1(d) and Section 6.2(d) of the Existing Agreement, the conditions to Closing contained in Article 6 have been fulfilled or are capable of being fulfilled, and (ii) that the Closing End Date is hereby extended from June 30, 2021 to January 3, 2022.