Lake Wentworth
Carroll County, New Hampshire3,097 acresView mapDirections
No nutrient or algae sampling on record from NHDES for this lake.
- Impaired · Mercury
- 80 ft max depth
Lake Wentworth in Carroll County, New Hampshire has water-quality measurements published by NHDES, shown here as reported. Maximum depth: 80 ft. Surface area: 3097 acres.
Lake Wentworth is a 3,097-acre lake in Carroll County, New Hampshire with a maximum depth of 80 feet (21-foot average).
Source: EPA Water Quality Portal sampling records, your state environmental agency. Methodology: how these readings are compared.
What Lake Wentworth is good for
From access and monitoring records, not editorial picks.
- Deep water80 ft surveyed max depth
- Big water3,097 acres
Swimming conditions
No readingNot rated
Nutrient and algae readings are not a swimming clearance. Lake Wentworth is listed impaired under Clean Water Act §303(d) (IR 5) for mercury, nuisance exotic species, oxygen depletion (low DO), pH / acidity. Check local advisories before you swim.
Whether Lake Wentworth 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 Lake Wentworth
These are the measurements NHDES publishes for Lake Wentworth, 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 Lake Wentworth
Answers come straight from the public measurements and survey records on this page.
Lake Details
Max depth
80 ft
Average depth
21 ft
Surface area
3,097 acres
Shoreline
14.8 mi
The depth above comes from a bathymetric survey of this lake, not from a regional estimate.
Stays via Stay22
Stays near Lake Wentworth
Compare lakeside cabins, hotels, and vacation rentals near Lake Wentworth in Carroll County, New Hampshire — live availability and prices for your trip. Switch the map to Satellite to see the lake and how close each stay is to the water.
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Fishing Lake Wentworth
EPA Impairment Status
Lake Wentworth 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 NHLAK700020101-05-01 · Official waterbody report
Nearby Lakes in Carroll County
Frequently asked questions about Lake Wentworth
Where is Lake Wentworth?
- Lake Wentworth 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 Lake Wentworth?
- Lake Wentworth in Carroll County, New Hampshire has water-quality measurements published by NHDES, shown here as reported. Maximum depth: 80 ft. Surface area: 3097 acres.
Is Lake Wentworth safe to swim in?
- Nutrient and algae readings are not a swimming clearance. Lake Wentworth is listed impaired under Clean Water Act §303(d) (IR 5) for mercury, nuisance exotic species, oxygen depletion (low DO), pH / acidity. Check local advisories before you swim.
How deep is Lake Wentworth?
- Lake Wentworth has a maximum depth of 80 feet and an average depth of 21 feet. The lake covers 3097 acres.
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Where this data comes from
Measurements for Lake Wentworth 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