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LLA Announcements

Lake Lillinonah Treatment Notification - September 1st, 2026

 by LLA Board on 08/27/26

The Pond and Lake Connection will be treating Lake Lillinonah on Tuesday, September 1, targeting the invasive hydrilla with the aquatic herbicide Tribune. 

The treatment will be done throughout the lake where hydrilla has been identified by an aquatic biologist. The majority of the treatment will be north of poison ivy island to Lovers Leap, and the northern section of the Shepaug River. There are isolated patches of hydrilla from New Milford all the way to the dam. They will be targeted on a spot-treatment basis. 

There are no labeled restrictions for swimming, fishing, boating or water contact. In the treatment areas, irrigation can commence on 9/6, livestock water on 9/2 and drinking for consumption on 9/4.

Please reach out to The Pond and Lake Connection at (203) 885-0184 if you have any questions.

2026 Announcements

 by LLA Board on 01/06/26

2026 - Announcements and information related to the Lake will be posted here as appropriate.

Contact Numbers
Emergencies Call 911

Report Boating Accidents to CT DEEP 
860-434-8638

Lillinonah Lake Authority
203-364-4002

The Lake Lillinonah Authority phone number is an unmonitored phone. Those in need of emergency services while on the lake should call either 911 or the CT DEEP.
 
If you need non-emergency help, call 911 and ask to be transferred to the Lake Authority at Brookfield Dispatch.
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