Holden sits inside the Wachusett Reservoir watershed, and that is the single most distinctive thing about building here. The reservoir is a source of drinking water for roughly 2.7 million people in eastern Massachusetts, and the state protects it accordingly. The Massachusetts Watershed Protection Act regulates land use and activity within critical areas near tributaries, wetlands, and surface water throughout the watershed, and Holden is one of the communities where those rules apply.
Whether it touches your project depends entirely on where your property sits. On a lot well away from a stream or wetland, it usually never comes up. On a lot near one, it can affect where you are allowed to build, how much impervious surface you can add, and what happens with a septic system. It is not a reason not to build. It is a reason to know before you draw plans, because redesigning around a constraint discovered at permitting is far more expensive than designing around one you knew about in week one. We check this at the site visit.
The reservoir shapes the town in a more visible way too. A significant share of the land in and around Holden is protected watershed property that will never be developed, which is part of why the town feels the way it does and why the lots that exist are worth building on rather than leaving.