Scores

Watershed: Moderately Disturbed
WQ Standards: Meets Standards
Color Scoring System
Good Conditions
Fair Conditions
Poor Conditions

Insufficient Data


Learn How Lakes Are Scored

Water Quality Data

Plots

  • Trophic condition thresholds are indicated by shading:
Hypereutrophic
Eutrophic
Mesotrophic
Oligotrophic
  • Click on “Daily Mean” or “Annual Mean” to toggle on or off the data layer.
Spring Phosphorus
Trend: Stable (p-value = 0.513)
Summer Phosphorus
Trend: Highly Significantly Increasing (p-value = 4e-04)

Summer Secchi
Trend: Stable (p-value = 0.0773)
Summer Chlorophyll-a
Trend: Highly Significantly Increasing (p-value = 0.0016)

Lake Information

Info

Town Derby
Planning Basin Lake Memphremagog
Surface Area 776.4 acres
Basin To Lake Area Ratio 108
Maximum Depth 70 feet
Elevation 963 feet

Known Invasive Species Infestations

Common Name Scientific Name
Eurasian watermilfoil Myriophyllum spicatum

Long Term Means

Season Long Term Mean # Years Data
Total Phosphorus (ug/L)
Spring 11.7 15
Summer 14.9 23
Secchi Transparency (m)
Summer 4.6 33
Chlorophyll-a (ug/L)
Summer 3.1 29