Watershed Wellness and our Service Area

Watershed Wellness

panorama shot of big and little Squam

The SLA is dedicated to conserving for public benefit the natural beauty, peaceful character and resources of the watershed. We have been doing this since 1904. We strive to maintain the exceptional beauty, natural health, and quality of life for those living near and visiting this iconic lake using Watershed Wellness.

Watershed Wellness is the holistic wellbeing of the entire Squam Lakes watershed based on the ecological integrity of the land and water resources and the health of the watershed communities. Our scope of work covers the mountains and forests, wetlands and water, work within the watershed communities, and advocacy at the local, regional, and state level. We undertake these efforts with programs in conservation, education, and recreation. We partner with many local and regional groups and work closely with volunteers in order to better accomplish our mission.

The habitats of this watershed are a wonderful home for a variety of northern plant and animal communities. The lakes hold healthy populations of fish. The natural beauty and recreational opportunities encompassed within the Squam Watershed are a very powerful draw for people from across the country, indeed the world. This same draw is a crucial economic driver for the local communities. The Squam Lakes Association is dedicated to preserving this same level of environmental and recreational quality now and for all future generations.

Service Area

Our primary effort occurs within the physical watershed of the Squam Lakes. We keep a careful eye on activities and legislation at local, regional, and national levels to protect this watershed and to support efforts that raise the conservation bar.

Major Water bodies in the Squam Lakes watershed:
Big Squam, Little Squam, Barville Pond, Intervale Pond, Jackson Pond, Kesumpe Pond, Owl Brook, Sky Pond, Squam River, White Oak Pond

Towns in the watershed:
Ashland, Center Harbor, Holderness, Moultonborough, Sandwich, Campton, Meredith, New Hampton

Counties in the watershed:
Belknap, Carroll, Grafton

More lake and watershed facts:
Size of Little Squam Lake:    408 acres
Length of shoreline:  4.3 miles
Average depth:         23 feet
Maximum depth:        84 feet
Water volume:      ~3,060,000,000 gal

Size of Squam Lake:     6,765 acres
Length of shoreline:   60.5 miles
Average depth:          36 feet
Maximum depth:   98 feet
Water volume:        ~79,400,000,000 gal

Drainage area to dam in Ashland:   57.80 square miles
Full pond elevation:     562.50 feet above MSL
Right of flowage:     563.00 feet above MSL
Normal minimum flow at dam:   60 ft³/s
1” precipitation = 3.5” rise in lake level

Evaporation = 1/5 inch (0.2") of lake level decline per day
Evaporation = 1.4" of lake level decline per week

Dam flow at 60 ft³/s = 1/33 inch (0.03") of lake level decline per day
Dam flow at 60 ft³/s = 0.2" of lake level decline per week