[1] Aquarion Water Company provides regulated and non-regulated water related services in Connecticut, Massachusetts, and New Hampshire.

[2][3] In June 2017 Aquarion announced its merger with Eversource Energy for $1.675 billion.

[4] Aquarion would become a fully-owned subsidiary and retain its own name, adding 300 employees and 230,000 customers in Connecticut, Massachusetts, and New Hampshire.

In December 2017, the merger was completed after government approval.

[5] On March 15, 2023, Connecticut legislators denied a rate increase by the company, instead approving a plan to lower the rates by $67 per year.