On June 8, the Ledge Light Health District (LLHD) issued this statement:

Ledge Light Health District is offering mosquito control consultation services and larvicidal mosquito dunks to residents in East Lyme, Groton, Ledyard, Lyme, Old Lyme, New London, North Stonington, Stonington, and Waterford.


Mosquito dunks are a larvicide designed to lessen the potential for West Nile Virus, Eastern Equine Encephalitis and Zika Virus. They are safe for use around the home because they utilize a naturally occurring biological treatment to eliminate mosquitos before they become flying/feeding adults.


Now is the time to be proactive about mosquito control because they are just beginning to breed for the summer season. Breeding sites include standing water in wetland areas or yard depressions, clogged rain gutters, empty garden containers, used tire piles, pool covers and tree holes.


It is important to empty standing water on your property once a week to eliminate potential mosquito breeding. When standing water cannot be removed, using a larvicide will eliminate immature mosquitoes before they can mature into flying adults. Flying adults are much more difficult and costly to eliminate.


Ledge Light Health District will provide to residents or homeowners association, free of charge:


  1. A site visit to assess standing water issues and make recommendations for eliminating mosquito breeding conditions
  2. An initial treatment with mosquito dunks*
  3. A season‐long supply of mosquito dunks, until our supply is eliminated.

*Please note that the District will only provide larvicide dunks for standing water bodies less than 400 square feet. Application of the larvicide will be done by the homeowner.


For more information: Kara Hovland 860‐448‐4882 extension 1308 (East of Thames River); or Patti Myers, 860‐434‐1605 extension 214 (West of Thames River).