Lake Sunapee Protective Association


Water Quality

LSPA has been concerned with water quality since its founding in 1898, when the issues were sawdust and trash in the lake and the level of the lake water. In the 1950’s LSPA collected water samples and tested for E.coli in order to have Lake Sunapee meet the standards to be named a class A (drinking water quality) lake in New Hampshire.

Starting in the 1980’s, LSPA volunteer water quality monitors have been regularly sampling Lake Sunapee’s water in cove and deep sites in Lake Sunapee, and more recently in its tributary streams. The samples are analyzed in LSPA’s Water Quality Laboratory at Colby-Sawyer College; NH Department of Environmental Services provides an annual water quality report based on its analysis of the data as part of the VLAP (Volunteer Lake Assessment) Program.

The LSPA lab at Colby-Sawyer College, run by Bonnie Lewis under strict quality standards as a sister lab to the state lab at NH Department of Environmental Services, also processes water samples for about twenty five area lakes.

"Deep Siting" in lake measurements are also taken in Lake Sunapee, along with water samples from many Water Quality Monitors around the lake and its tributaries.


Current Topics

Road Salt - Things to Know
Road Salt - Things to Know

Invasive Watch Workshop
Saturday, June 27,2015, 9 am to 10:30 am

Summer 2015 Internship
Summer 2015 Internship
Real World Application of Environmental Sciences

Science at Sunapee
LSPA's Scientific Advisory Committee have recently published their research on freshwater lake topics

8 Things You Can Do to Protect Your Watershed
8 Things You Can Do to Protect Your Watershed

We Are All Connected
We Are All Connected
Smoke from West Coast US fires caused pollution in Eastern US.

Cyano Count Program
LSPA has a new "Cyano Count" program for Lake Sunapee.

VT worries about "New" Aquatic Invasives
VT worries about "New" Aquatic Invasives

The New Aquatic Invasives
New Aquatic Invasives are spread in the Northeast. Zebra mussels, Asian clams and quagga mussels are among the latest "invaders" of our water bodies in NH as well as NY, VT, ME, MA and CT.

Lead Free Lakes – Good for Loons and People
Lead Free Lakes – good for loons and people
There is a movement underway to make NH lakes lead-free.

Irene and Lake Sunapee
Tropical Storm Irene did have its influence on Lake Sunapee. View the graphed data collected by LSPA's buoy.

2011 Lake Sunapee Ice Out
Lake Sunapee ice out was Thursday, April 21st-late in the day!

All About Winter Lake De-Icers
All About Winter Lake De-Icers

NHLA Grant -2010
NHLA Grant-2010 Helps Prevent Invasive Milfoil

Keeping our water clean
Keeping our water clean - LSPA and Fells volunteers and staff clean up a section of Lake Sunapee.

Otter Pond Withdrawals
Otter Pond Withdrawals - extraordinary water withdrawals at Otter Pond.

Springtime Signals Key Lake Cycle
Springtime Signals Key Lake Cycle
Much goes on underneath the surface of lakes as the ice melts!

Winter Use of De-Icers
A Reminder About Winter Use of De-Icers

Dominant Phytoplankton (Algae) in Lake Sunapee
dominant algae present

Cyanobacterial Blooms
There has been recent local media attention to cyanobacterial (blue green algae) blooms in New Hampshire lakes.

Carey’s Graduate Work
Cayelan Carey will be continuing
the data collection work she began last
summer for her dissertation at Cornell.

Lake Sunapee Bathymetry
Some Surprises from Lake Sunapee Bathymetry

John Downing - lake scientist visits Sunapee
During the week of July 21st, Prof. John Downing studied Lake Sunapee, defining the lake bottom contour.

How Lakes Freeze
Recently, I have had several people ask about how lakes freeze. I knew some answers, but as I researched deeper, the freezing of lakes can be complicated!

Variable milfoil
Myriophyllum heterophyllum (Michx)
Environmental Factsheet Courtesy of NH DES

Didymo: The New Invasive
The invasive species Didymosphenia geminata, or didymo was discovered in Vermont June 25th, 2007

Eurasian Milfoil
Species Description for Eurasian Milfoil

Milfoil prevention efforts at LSPA
Milfoil prevention efforts at LSPA began in 1998 when we established two aggressive programs (Weed Watch and Boat Launch Monitor) to provide early detection of invasive aquatic plants.

Gloeotrichia echinulata
Gloeotrichia echinulata, a blue-green alga, has recently been blooming in Lake Sunapee.

Water Quality Parameters and Definitions
Water quality parameters which are regularly tested by LSPA include the following:

Invasive Aquatic Plants
LSPA’s volunteer weed watch program discovered invasive milfoil in Georges Mills in the summer of 2001.

Invasive Animals
There are other aquatic invasive species in New England that LSPA is concerned with.

Algae Update
There are five general types of algae in Lake Sunapee and surrounding ponds.

Water Quality Monitors
LSPA has a long history of setting and maintaining standards of excellence in our water quality testing program

Milfoil "Save"
On June 16th, LSPA Lake Host made another milfoil “Save” this summer.

State of the Lake, April 2006
Aquatic Macrophytes (Plants) and Invasive Species

LSPA Lab Manager, Bonnie Lewis, testing samples.

2012 LSPA Lab Interns taking water samples.

Lab interns busy processing water samples.

LSPA's Water Quality Lab at Colby Sawyer College