Lake Winnipesaukee Association – Love the Lake

The Lake Winnipesaukee Association (LWA) is a non-profit organization dedicated to protecting the water quality and natural resources of Lake Winnipesaukee and its watershed.  Through monitoring, education, stewardship, and science-guided approaches for lake management, LWA works to ensure Winnipesaukee’s scenic beauty, wildlife habitat, water quality and recreational potential continues to provide enjoyment long into the future.

Our programs and projects arise from a deep appreciation and love for the lake and its environment, and desire to keep it beautiful and clean for countless generations to come. 

State of Lake Winnipesaukee’s Water Quality

The Lake Winnipesaukee Association held its annual meeting on July 21, 2018 at the Wolfeboro Town Hall.  The program featured a talk on the current state of Winnipesaukee’s water quality, and what the LWA is doing to ensure the water quality stays healthy for the long term.  Don Kretchmer, a certified lake manager, limnologist, and Wolfeboro resident presented an overview of the issues, and review of the trends in levels of total phosphorus, chlorophyll-a, and water clarity. 

The good news is that levels of chlorophyll-a have remained relatively stable for the past 20 years, and water clarity is good.  However, phosphorus levels have increased significantly above natural background levels.  Phosphorus is a nutrient that promotes plant growth, and is usually not naturally abundant in freshwater.  The state of NH has set a nutrient standard of 8.0 ppb total phosphorus (TP) for a high quality water, which Winnipesaukee is classified as.  Winnipesaukee’s lake-wide average level of TP has been creeping up, and is currently at 6 ppb.  Some areas of the lake, such as Moultonborough Bay Inlet have historically been well above the 8.0 ppb; however water quality appears to be improving in  Moultonborough Bay Inlet, which shows a decrease in phosphorus concentrations from 14 ppb approximately 20 years ago to 9.0 ppb average for the past 5 years.

Diane Hanley, President of LWA, thanked the many water quality monitors who were present for their service in collecting the data.  Without their efforts and dedication, we would not have the information needed to monitor the long term health of the lake.  Recognized for their volunteer service were Steve Wingate, Warren Muir, Mike and Muriel Robinette, Jim MacBride, Bill Gassman, Peter Glick, Andy Opel, and Marty Koons.

Pat Tarpey, Executive Director of LWA, presented information on how the LWA is working to maintain and improve water quality, by identifying sources of pollution that contribute nutrient loading to the lake.  With over 200 phosphorus ‘hotspots’ identified, the LWA has launched a capacity building campaign to help the organization transition into mitigating these sites.

Click here to view the presentation.


A Winnipesaukee Dozen Ways to Love the Lake

13 Ways to Love the Lake_Page_1If you would like to receive printed copies of the Winnipesaukee Dozen, please contact  our office.







Boating Season is Here –

Help Keep Winnipesaukee Clean – Put a Sock In It!
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Proper boat maintenance protects our lake.  Oil and fuel can leak from your engine and collect in the bilge compartment.  When the bilge is activated, these chemicals are discharged into the lake.

Bilge socks, which absorb the excess oil and gas, are an inexpensive way to prevent these substances from polluting our water.

Install a bilge sock into your engine’s compartment at the beginning of the boating season, and remove and dispose of it during the winterization process of your vessel.  You can request your marina to do it, or do it yourself.  You should check the bilge compartment on a regular basis to be sure the sock is properly secured. 

Blue-heart-clipart-free-images-2  Be a Clean Boater!  Blue-heart-clipart-free-images-2

  • Use proper care when fueling your boat – do not top off your tank.
  • Do not wash your boat in the lake – only at an approved wash station, or away from the lake.
  • Use nontoxic, and chlorine and phosphate free cleaners.
  • Use Pump Out Stations – it is illegal to discharge untreated sewage into the lake.
  • Clean, drain, and dry your boat when trailering to help prevent the spread of invasive species from one waterbody to another.

Water Quality Data Available on line!

You can now access water quality data for Lake Winnipesaukee online! Check it out on the Winnipesaukee Gateway website: Winnipesaukee Gateway Monitoring Sites Map

It’s Winni Cool!



The Lake Winnipesaukee Association is a 501(c)(3) nonprofit organization working to protect the water quality and natural resources of Lake Winnipesaukee
and its watershed now and for future generations.