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Water Chestnut Pulls in SLELO and Beyond

July 1, 2023 - August 4, 2023

Join water chestnut removal efforts occurring in the SLELO region and beyond. Water chestnut (Trapa natans) is an invasive aquatic plant that grows thick, dense, floating mats that impede aquatic recreation, reduce waterfront property values, and alter aquatic ecosystems. Water chestnut populations can be suppressed through manual removals of their floating rosette and nutlets.

What to Expect: Using a kayak or canoe to paddle around a given area to collect the floating rosettes and nutlets of water chestnut and bring them ashore to be disposed of.

Tips: When pulling water chestnut plants, only the leaves and fruits need to be removed. Water chestnuts are an annual plant. Without leaves, the roots die, and without seeds, the plant cannot spread. Pulling the roots disrupts the sediment at the bottom of the water body. If the sediment comes loose and migrates, it can lead to changes in the shape of rivers and streams, as well as leading to a lack of nutrients for native water plants.

2023 upcoming water chestnut hand-pull events: 

Location: Guffin Bay, Chaumont NY 

Location: Oswegatchie River, Heuvelton, NY

  • Date: July 15th (alternate date July 16th)
  • Time: 10 am-4 pm (estimated)
  • Details: Lunch provided. Volunteers will be assigned to one of these launch locations: 
    Launch Location 1-Launch from the Village of Heuvelton boat launch and paddle to the Horseshoe Camp Ground (approximately 3-4 hours).
    Launch Location  2– Launch from the Horseshoe Camp Ground and paddle to Eel Weir State Park (approximately 3-4 hours).
  • Contact: Megan Pistolese-Shaw megan.pistolese@tnc.org 
  • Host: SLELO PRISM, NYS Parks, and various partners
  • Click to Register (required)

Location: Oneida Lake, NY 

  • June 30 @ 8 AM– Southshore Oneida Lake Marina
  • July 6 @ 8 AM– Northshore Shaw Road, West Monroe
  • July 21 @ 8 AM– Metzger’s Pond, Constantia
  • Contact: Patricia Cerro-Reehil at pcr@nywea.org; 315 727 5160
  • Host: Oneida Lake Association

Location: Mannsville Pond, Mannsville, NY

  • Date: Saturday, July  22nd
  • Time: 8 AM-12 PM
  • Details: Meet at the Maplewood Cemetery launch (google map). Bring your own watercraft and lifejacket.
  • Contact: Sarah Trick  ERS@JeffersonCountySWCD.org ; 315 782 2749

Location: Guffin Bay, Chaumont NY 

Help capture state-wide water chestnut control efforts and report pre and post-treatment data to iMapInvasives.org. View a step-by-step guide HERE.


July 1, 2023
August 4, 2023

Contact megan.pistolese@tnc.org to list your events on our events page and on Facebook.  

SLELO PRISM Partner Meeting Schedule: Our partners have decided to meet on a seasonal/quarterly basis. We will meet the third week of these months:  January, April, July, and October alternating between  Wednesdays and Thursdays, starting at 10 am.

If you want to receive partner meeting announcements please email rwilliams@tnc.org .

Save the Date for 2023 Partner Meetings:

Thursday, October 12th

Keewaydin State Park – Marina Pavilion, 10 am-12 pm 45165 State Route 12, Alexandria Bay, NY 13607

The PRISM Network hosts a monthly Speaker Series on the last Wednesday of each month (except, July, August, and December).

View the Webinar Schedule & Access Recordings

iMapInvasives holds training webinars after the PRISM  Speaker Series from 1 pm-2 pm. Visit the iMap website for details and to register. 

 View Events Pages of the PRISM Network


Capital Region PRISM 

Catskill (CRISP) PRISM 

Finger Lakes PRISM

LIISMA (Long Island) PRISM  

Lower Hudson PRISM

Western NY PRISM