American Water Works Company Inc

ITEM 1. LEGAL PROCEEDINGS

The following information updates and amends the information provided in the Company’s Form 10-K in Item 3—Legal Proceedings. Capitalized terms used but not otherwise defined herein have the meanings set forth in the Company’s Form 10-K. In accordance with the SEC’s disclosure rules, the Company has elected to disclose environmental proceedings involving the Company and a governmental authority if the amount of potential monetary sanctions, exclusive of interest and costs, that the Company reasonably believes will result from such proceeding is $1 million or more.

Alternative Water Supply in Lieu of Carmel River Diversions

Monterey Peninsula Water Supply Project

CPUC Final Approval of Water Supply Project

The CPUC’s March 2023 final decision provides Cal Am with an opportunity to increase its cost cap (currently set at a total of $112 million) for certain of the Water Supply Project’s extraction wells. On April 10, 2025, the CPUC issued a proposed decision, which remains subject to the issuance of a final decision, that would authorize an increase of $11 million to this cost cap for the specified extraction wells.

Coastal Development Permit Application

On March 28, 2025, the Monterey County Superior Court issued an intended decision to deny in full the joint petition for writ of mandate by the City, MCWD and MPWMD. As permitted by the court, written statements have been filed identifying issues believed to have not been addressed in the intended decision. Cal Am has been given until April 29, 2025, to respond to these statements.

Cal Am’s Action for Damages Following Termination of RDP

Following a hearing, on December 5, 2024, the court granted MCWD’s motion without leave to amend, dismissing all of Cal Am’s remaining claims. Final judgment was entered on January 7, 2025. On February 27, 2025, Cal Am and MCWRA each filed a Notice of Appeal of the trial court’s decision.

Mountaineer Gas Company Main Break

The West Virginia Business Court had set a trial date of October 7, 2025, for the matter of Mountaineer Gas Company v. West Virginia-American Water Company. Upon motion of the parties, the trial date has been reset to March 16, 2026, to allow for the completion of discovery.

Cybersecurity Incident Consolidated Class Action Lawsuit

Prior to filing a consolidated complaint, the plaintiffs in the putative consolidated class action lawsuit against parent company related to the Company’s previously reported October 2024 cybersecurity incident, captioned Johnsen et al. v. American Water Works Company, Inc., agreed to voluntarily dismiss the consolidated lawsuit without prejudice. On March 21, 2025, the parties filed a stipulation to that effect. An order of voluntary dismissal was entered by the U.S. District Court for the District of New Jersey on March 24, 2025, which concludes this lawsuit against parent company.

PFAS Multi-District Litigation

The Company has timely submitted to the PFAS MDL its Phase One claim forms pursuant to the Tyco Fire Products LP and BASF Corporation class action settlements.