Massachusetts-Notice of Company Sale and Regulatory Review

June 18, 2025

Earlier this year, Eversource Energy announced its intent to sell Aquarion Company. In May, Unitil Corporation agreed to purchase Aquarion Water Company of Massachusetts, Aquarion Water Company of New Hampshire and Abenaki Water Company (“the Companies”).

This transaction is expected to be finalized in 2025 and is subject to regulatory approval in Massachusetts and New Hampshire. If the transaction is approved, the Companies would continue to operate as regulated water companies and would become wholly owned subsidiaries of Unitil.

About Unitil Corporation
Unitil is a publicly traded electric and gas utility holding company headquartered in Hampton, New Hampshire. With operations across Maine, New Hampshire, and Massachusetts, Unitil’s utilities serve approximately 109,400 electric customers and 97,600 natural gas customers.

What This Means for You
Once the transaction is completed, local employees of Aquarion Water Company of Massachusetts, Aquarion Water Company of New Hampshire, and Abenaki Water Company will become employees of Unitil. We are confident that our employees—and our customers—will be well supported by Unitil, a strong and growing utility with deep local ties in the States of Massachusetts and New Hampshire.

Additionally, your water rates will remain at current rates. Any future change in rates must be authorized by the regulatory agencies in each state.

We remain committed to keeping you informed about this transaction and ensuring a smooth transition with uninterrupted service.

Following the Regulatory Review
To follow the regulatory review process of this transaction, please visit https://eeaonline.eea.state.ma.us/dpu/fileroom/#/dockets/docket/12519 for the Massachusetts docket and https://www.puc.nh.gov/VirtualFileRoom/Docket.aspx?DocketNumber=DW%2025-028 for the New Hampshire docket.

View Notice in Other Languages