Greenough Pond
Coos County, New Hampshire234 acresView mapDirections
No nutrient or algae sampling on record from NHDES for this lake.
- Impaired · Mercury
- 103 ft max depth
Greenough Pond in Coos County, New Hampshire has water-quality measurements published by NHDES, shown here as reported. Maximum depth: 103 ft. Surface area: 234 acres.
Greenough Pond is a 234-acre lake in Coos County, New Hampshire with a maximum depth of 103 feet (38-foot average).
Source: EPA Water Quality Portal sampling records, your state environmental agency. Methodology: how these readings are compared.
What Greenough Pond is good for
From access and monitoring records, not editorial picks.
- Deep water103 ft surveyed max depth
Swimming conditions
No readingNot rated
Nutrient and algae readings are not a swimming clearance. Greenough Pond is listed impaired under Clean Water Act §303(d) (IR 5) for mercury, pH / acidity. Check local advisories before you swim.
Whether Greenough 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 Greenough Pond
These are the measurements NHDES publishes for Greenough 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 Greenough Pond
Answers come straight from the public measurements and survey records on this page.
Lake Details
Max depth
103 ft
Average depth
37.7 ft
Surface area
234 acres
Shoreline
2.9 mi
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Fishing Greenough Pond
EPA Impairment Status
Greenough 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 NHLAK400010502-03 · Official waterbody report
Nearby Lakes in Coos County
Frequently asked questions about Greenough Pond
Where is Greenough Pond?
- Greenough Pond is a lake in Coos County, New Hampshire. Its water-quality measurements are published by NHDES and shown on this page as reported.
What is the water quality of Greenough Pond?
- Greenough Pond in Coos County, New Hampshire has water-quality measurements published by NHDES, shown here as reported. Maximum depth: 103 ft. Surface area: 234 acres.
Is Greenough Pond safe to swim in?
- Nutrient and algae readings are not a swimming clearance. Greenough 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 Greenough Pond?
- Greenough Pond has a maximum depth of 103 feet and an average depth of 37.7 feet. The lake covers 234 acres.
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Where this data comes from
Measurements for Greenough 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