Spofford Lake Association

Water Quality Report


Attached below is the 2018 'Spofford Lake Water Quality Report'.  Results are based on water samples taken during the summer by SLA volunteers and are published annually by NH's Department of Environmental Services (DES)

As you can see, the lake's Phosphorus and Chlorophyll-a levels are good but Dissolved Oxygen (D.O.) levels are 'Bad'. This is unusual as these three measurements generally move together. DO levels and temperature patterns "influence lake productivity, physical properties, phosphorus cycling and fish and aquatic animal populations. Main causes of low DO is increasing amounts of decaying organic matter from stormwater runoff and eroding shoreline. 

To better define the reasons for Spofford Lake's chemical profile and as recommended in the 'Spofford Lake Watershed Plan', the SLA funded a 'Core Sediment Analysis'. For more information on this, see the tab at the right.

The Lake's higher' Conductivity' "may indicate pollution from such sources as road salting (and) septic systems...".  

Take time to understand the Lake's vulnerabilities and think about what steps you might take (or not take) to help maintain and improve Spofford Lake's water quality.