After significant rain, the town of Fairfield may close its public beaches for swimming due to high bacteria levels. This includes Lake Mohegan that feeds into our lake. In the event of town closures, Lake Hills currently does not close its beaches, but suggests that if you choose to swim, do so with caution and at your own risk. When on duty, Lake Hills lifeguards will notify members of town closures. Read more about the Town protocol and stay informed of current conditions at the Fairfield Health Department’s blog,

Lake Hills Members,

All Habitat Services (AHS)  is scheduled to perform the following items Friday.

  • Survey weed and algae growth throughout the lake.

  • Herbicide application (diquat) to invasive/nuisance weeds in swim areas and boating lanes, as needed.

  • Algaecide application (Sodium Carbonate Peroxyhydrate) to reduce filamentous algae growth (green/brown slime) on the lake surface and the lake bottom and to help prevent microscopic algae blooms (green water).

  • Water sampling, including nutrient, e. coli and planktonic algae analysis

AHS will perform the work from a boat launched from Beach 4 or Beach 6.


AHS will post chemical application notifications (8.5" x 11"​​

paper) at applicable LHA beaches before or during all  treatments. The notifications contain details of water usage restrictions  -- which are typically none for algaecide treatments and/or minimal restrictions for herbicide treatments.

*** Signs are ONLY posted at LHA beaches if a treatment was performed in the vicinity. Lakefront homeowners can check their closest beach to determine if a treatment was performed in the area. *****

Please keep an eye out for the posted notifications and adhere to any noted usage restrictions. If chemicals are applied directly in a swim area, it is advised to remain out of the water in that area forone hour.


  1. Feeding your lawn can also feed the weeds and algae in the lake. Please minimize or eliminate lawn fertilizers. Consider having your soil analyzed by your lawn company or do it yourself ( to determine any deficiencies and receive appropriate recommendations.  If you choose to fertilize, consider using organic fertilizer with low or no phosphorous and low nitrogen (first number is nitrogen, middle number is phosphorous, ex., 10-0-4) 

  2. NEVER dump any yard debris or chemicals into or near the lake.

  3. Properly maintain septic systems and ensure they are not leaking.

  4. Manually remove nuisance aquatic weeds and filamentous algae from near-shore swim areas.

THANK YOU! ~Lake Hills Board

The past month has been fantastic out on the lake. We have been so blessed to not only have access to our own open spaces, but to belong to a well behaved and caring community that makes this possible. The board members have continued to review updates from the Town of Fairfield and the State of Connecticut regarding the use of open space properties during the COVID-19 pandemic. As the state of CT and the Town of Fairfield continue to re-open, the LHA Board is asking its members to adhere to the following guidelines while using our beaches:

• Please continue to practice social distancing on the LHA beaches.

• If you are unable to practice social distancing while at the beaches, please wear a mask.

• If you have been exposed to, tested positive for, or are experiencing symptoms of Covid-19, please do not visit the LHA beaches.

We have had requests from some members of our community to allow for some form of beach access for people who are immunocompromised or otherwise particularly susceptible to COVID-19. We are asking that our beaches be reserved for use by these members from 9-11 AM daily so that the people who need to practice extended social distancing and wear masks can feel comfortable like the rest of us.

The floating docks have been returned to service and are available for use. As always, use of the lake remains at your own risk. If you have any questions or concerns please reach out to one of your beach reps. We're happy to talk to you.