Glen Lake
Hillsborough County, New Hampshire137 acresView mapDirections
No nutrient or algae sampling on record from NHDES for this lake.
- Impaired · Mercury
- 50 ft max depth
Glen Lake in Hillsborough County, New Hampshire has water-quality measurements published by NHDES, shown here as reported. Maximum depth: 50 ft. Surface area: 137 acres.
Glen Lake is a 137-acre lake in Hillsborough County, New Hampshire with a maximum depth of 50 feet (19-foot average).
Source: EPA Water Quality Portal sampling records, your state environmental agency. Methodology: how these readings are compared.
What Glen Lake is good for
From access and monitoring records, not editorial picks.
- Deep water50 ft surveyed max depth
Swimming conditions
No readingNot rated
Nutrient and algae readings are not a swimming clearance. Glen Lake is listed impaired under Clean Water Act §303(d) (IR 5) for mercury, nuisance exotic species, pH / acidity. Check local advisories before you swim.
Whether Glen Lake is safe to swim in today is a call for the New Hampshire Department of Environmental Services and the county health department, who post current advisories. LakeQuality does not issue swimming clearances.
Water quality measurements for Glen Lake
These are the measurements NHDES publishes for Glen Lake, shown as reported. The condition class beside each reading is the EPA National Lakes Assessment class for this lake’s ecoregion.
No clarity data. TSI undefined.
Ask about Glen Lake
Answers come straight from the public measurements and survey records on this page.
Lake Details
Max depth
50 ft
Average depth
19.4 ft
Surface area
137 acres
Shoreline
3.8 mi
The depth above comes from a bathymetric survey of this lake, not from a regional estimate.
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Fishing Glen Lake
EPA Impairment Status
Glen Lake is officially listed as impaired under Clean Water Act §303(d) in the 2024 EPA reporting cycle (IR category 5).
Causes of impairment
Designated uses not supporting: Aquatic life, Fish consumption.
A Total Maximum Daily Load (TMDL) plan has been approved.
Source: EPA ATTAINS assessment unit NHLAK700060607-01-01 · Official waterbody report
Nearby Lakes in Hillsborough County
Frequently asked questions about Glen Lake
Where is Glen Lake?
- Glen Lake is a lake in Hillsborough County, New Hampshire. Its water-quality measurements are published by NHDES and shown on this page as reported.
What is the water quality of Glen Lake?
- Glen Lake in Hillsborough County, New Hampshire has water-quality measurements published by NHDES, shown here as reported. Maximum depth: 50 ft. Surface area: 137 acres.
Is Glen Lake safe to swim in?
- Nutrient and algae readings are not a swimming clearance. Glen Lake is listed impaired under Clean Water Act §303(d) (IR 5) for mercury, nuisance exotic species, pH / acidity. Check local advisories before you swim.
How deep is Glen Lake?
- Glen Lake has a maximum depth of 50 feet and an average depth of 19.4 feet. The lake covers 137 acres.
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Where this data comes from
Measurements for Glen Lake come from the EPA Water Quality Portal. Per-sample source details are not recorded for this lake.
Other records on this page
Impairment status from EPA ATTAINS 303(d) database