Dinsmore Pond
Carroll County, New Hampshire50 acresView mapDirections
No nutrient or algae sampling on record from NHDES for this lake.
- Impaired · Mercury
- 25 ft max depth
Dinsmore Pond in Carroll County, New Hampshire has water-quality measurements published by NHDES, shown here as reported. Maximum depth: 25 ft. Surface area: 50 acres.
Dinsmore Pond is a 50-acre lake in Carroll County, New Hampshire with a maximum depth of 25 feet (8-foot average).
Source: EPA Water Quality Portal sampling records, your state environmental agency. Methodology: how these readings are compared.
Swimming conditions
No readingNot rated
Nutrient and algae readings are not a swimming clearance. Dinsmore Pond is listed impaired under Clean Water Act §303(d) (IR 5) for mercury, pH / acidity. Check local advisories before you swim.
Whether Dinsmore Pond 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 Dinsmore Pond
These are the measurements NHDES publishes for Dinsmore Pond, 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 Dinsmore Pond
Answers come straight from the public measurements and survey records on this page.
Lake Details
Max depth
25 ft
Average depth
7.5 ft
Surface area
50 acres
Shoreline
2.2 mi
The depth above comes from a bathymetric survey of this lake, not from a regional estimate.
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Fishing Dinsmore Pond
EPA Impairment Status
Dinsmore Pond 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 NHLAK700020103-02 · Official waterbody report
Nearby Lakes in Carroll County
Frequently asked questions about Dinsmore Pond
Where is Dinsmore Pond?
- Dinsmore Pond is a lake in Carroll County, New Hampshire. Its water-quality measurements are published by NHDES and shown on this page as reported.
What is the water quality of Dinsmore Pond?
- Dinsmore Pond in Carroll County, New Hampshire has water-quality measurements published by NHDES, shown here as reported. Maximum depth: 25 ft. Surface area: 50 acres.
Is Dinsmore Pond safe to swim in?
- Nutrient and algae readings are not a swimming clearance. Dinsmore Pond is listed impaired under Clean Water Act §303(d) (IR 5) for mercury, pH / acidity. Check local advisories before you swim.
How deep is Dinsmore Pond?
- Dinsmore Pond has a maximum depth of 25 feet and an average depth of 7.5 feet. The lake covers 50 acres.
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Where this data comes from
Measurements for Dinsmore Pond 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