The town of Simsbury is debating whether it will formally appeal a massive solar project. At issue is a decision reached by the Connecticut Siting Council last month.

In December, the council unanimously approved what could be one of New England’s largest solar projects.

Developed by Deepwater Wind, the roughly 26-megawatt solar array would sit on about 290 acres in Simsbury, generating enough energy to power around 5,000 homes.

But during a meeting Monday night, residents raised concerns with the project. They said the state needs to better investigate possible effects on water quality at a nearby aquifer, and that the project could have a negative impact on the character of the town.

An attorney for Simsbury said the town would have to pay the legal fees for making an appeal, which could be substantial.

A representative of the Connecticut Siting Council said Simsbury has until February 5 to appeal the decision.