Lake Information Mapper
This interactive map allows the user to access water quality information of individual waterbodies around New Hampshire. By zooming in and clicking on a waterbody of interest, the user has access to historic and current Lake Trophic Survey reports, the most recent Volunteer Lake Assessment Program (VLAP) reports, Total Maximum Daily Load (TMDL) reports, ice cover history, cyanobacteria bloom history, Watershed Based Plans, Diagnostic Feasibility Studies, and information on known invasive aquatic species.
For additional information or if you have problems accessing particular content, please contact Kristen Nelson or dial (603) 271-1152 for accommodation. Note: if the Mapper is not loading, please try clearing your browser history and reloading the Mapper.
Waterbody: MASCOMA LAKE
Waterbody ID: NHLAK801060105-04-01
Current Trophic Class: Oligotrophic
Major River Basin: Connecticut
NH Acres: 1,154.78
Lake Trophic Survey Report (LTS)
Report Links: 1976 1985 2000 2008
Stations Used in LTS Reports:
MASENF1D MASENF-GEN
Volunteer Lake Assessment Program (VLAP)
Lake Report(s): 2019
Regional Report: 2014
Total Maximum Daily Load (TMDL) Reports
Report(s): Mercury
Ice-Out Dates
Ice out data
Click here to learn more about ice out data submittal.
Cyanobacteria Bloom(s)
Cyanobacteria Bloom History
Diagnostic Feasibility Study (DFS)
None available.
Watershed Based Plan(s)
No plan completed.
Mercury in Fish Tissue Report
Mercury in Fish Tissue Report Sheet
Exotic Invasive Species
Control Actions: Diver hand removal and suction harvesting keeping infestation low.
Management Plan: Contact NHDES
Species and Year Discovered:
2000 Eurasian milfoil
Soak Up The Rain
No SOAK projects completed.
Other Resources
NH Fish & Game Bathymetry Map
Mascoma Lake Association
Use Restrictions?
RSA 270:74-a – Skicraft shall not be operated on Saturdays or Sundays, effective 7/29/89.
Click here to check Marine Patrol’s list of Restricted Waterbodies