Fanwort Survey Zones

As most of you are aware, the invasive weed Fanwort has been found in various locations on the main lake. It was first found at the Island Road Boat Ramp cove and quickly spread elsewhere.

Fanwort is an aggressive weed which grows quickly and if left unchecked, can choke off our lake rendering it unusable. In order to prevent that devastating occurrence, visual surveys are being conducted regularly by our Survey Teams identifying these plants, and our DASH Teams later go out and remove it.

We're looking for volunteers to join one of our Survey Teams travelling around the lake in paddle boards, kayaks, canoes, pontoon boats or best yet snorkling or scuba diving to look for the plant and then mark it.

The lake has been divided into numerous survey zones. A zone captain has been appointed for each zone. Captains create a schedule and answer any questions you may have. Training sessions can also be held to educate volunteers on how to identify Fanwort.

Below are our Survey markers. ORANGE "H" Shaped Markers pictured below means Fanwort is present. It's best to stay clear at least 15 - 20 feet in all directions of any ORANGE MARKERS when out on the lake. Yellow markers represent Fanwort was just sucked up by our DASH team and is awaiting verification they removed all of the plant.

Orange Marker

Can't survey? Please consider joining one of our DASH Teams!

The success of these volunteer efforts are crucial to protecting our lake from being choked off by this aggressive and destructive weed.

Please contact the Office at or 978-582-6365 if you are able to help.

If you see Fanwort floating in the lake, pick it up. If you see it rooted in our lake, don't touch it. We're working on a video instructing you how to safely remove it from the lake. Instead email indiciating the Zone # and Property or Island # it's nearest from our Fanwort Survey Zones Map.

Fanwort can be very fragile if it's an older plant that we didn't know about for removal or in the fall and spreads by fragmentation. Below are pictures of Fanwort, one showing what can happen to a lake if left untreated.


Thank you for your consideration!