Conway Lake
Carroll County, New Hampshire1,316 acresView mapDirections
No nutrient or algae sampling on record from NHDES for this lake.
- Impaired · Mercury
- 45 ft max depth
Conway Lake in Carroll County, New Hampshire has water-quality measurements published by NHDES, shown here as reported. Maximum depth: 45 ft. Surface area: 1316 acres.
Conway Lake is a 1,316-acre lake in Carroll County, New Hampshire with a maximum depth of 45 feet (20-foot average).
Source: EPA Water Quality Portal sampling records, your state environmental agency. Methodology: how these readings are compared.
What Conway Lake is good for
From access and monitoring records, not editorial picks.
- Deep water45 ft surveyed max depth
- Big water1,316 acres
Swimming conditions
No readingNot rated
Nutrient and algae readings are not a swimming clearance. Conway Lake is listed impaired under Clean Water Act §303(d) (IR 5) for mercury, pH / acidity. Check local advisories before you swim.
Whether Conway 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 Conway Lake
These are the measurements NHDES publishes for Conway 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 Conway Lake
Answers come straight from the public measurements and survey records on this page.
Lake Details
Max depth
45 ft
Average depth
20.3 ft
Surface area
1,316 acres
Shoreline
16.7 mi
The depth above comes from a bathymetric survey of this lake, not from a regional estimate.
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Fishing Conway Lake
EPA Impairment Status
Conway 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 NHLAK600020304-01-01 · Official waterbody report
Nearby Lakes in Carroll County
Frequently asked questions about Conway Lake
Where is Conway Lake?
- Conway Lake 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 Conway Lake?
- Conway Lake in Carroll County, New Hampshire has water-quality measurements published by NHDES, shown here as reported. Maximum depth: 45 ft. Surface area: 1316 acres.
Is Conway Lake safe to swim in?
- Nutrient and algae readings are not a swimming clearance. Conway Lake is listed impaired under Clean Water Act §303(d) (IR 5) for mercury, pH / acidity. Check local advisories before you swim.
How deep is Conway Lake?
- Conway Lake has a maximum depth of 45 feet and an average depth of 20.3 feet. The lake covers 1316 acres.
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Where this data comes from
Measurements for Conway 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