Report a problem:

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If you observe an issue that could threaten the health of Halfmoon Lake or the safety of our residents please act! If your concern cannot be handled locally by a board member, contact the appropriate agency listed below.

Alton Police:

Office: 603-875-0757

Dispatch (24hr): 603-875-3752

Barnstead Police:

603-269-8100

Dispatch via Belknap Sheriff: 603-269-8100

Marine Patrol:

Gilford (for emergencies 911) else 603-293-2037. 

If calling about a safety issue press "0" for dispatch.

NH Fish & Game:

603-271-3211

Loons in distress: 

Loon Preservation Committee 

Call 603-476-5666, Email: info@loon.org

Report Cyanobacteria Bloom:

To report a bloom, click here

Report violations of environmental laws and Shoreline concerns:

NH Department of Environmental Services

Submit a complaint online, click here

For more information, click here

Water quality concerns: 

NH Department of Environmental Services 

Surface water complaint, click here

Illness After Swimming (people and pets)

For information on submitting a beach illness report, click here

Submit a beach illness report online, click here

Call (603) 848-8094.

Oil or Other Hazardous Substance Spill

 First, call the local police or fire department.

 Alton Police, Office 603-875-0757, Dispatch (24hr) 603-875-3752.

 Barnstead Police, 603-269-8100, Dispatch (via Belknap Sheriff): 269-8100.

 Contact the Spill Response Team 603 271-3899 or State Police 603 223-4381.

 For more information, click here

Unusual Plant or Exotic Growth

 Call: (603) 271-2248, Email: amy.smagula@des.nh.gov

  For information on DES Exotic Species Program, click here