Boston Lot Lake
Grafton County, New Hampshire45 acresView mapDirections
No nutrient or algae sampling on record from NHDES for this lake.
- Impaired · Mercury
- 22 ft max depth
Boston Lot Lake in Grafton County, New Hampshire has water-quality measurements published by NHDES, shown here as reported. Maximum depth: 22 ft. Surface area: 45 acres.
Boston Lot Lake is a 45-acre lake in Grafton County, New Hampshire with a maximum depth of 22 feet (14-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. Boston Lot Lake is listed impaired under Clean Water Act §303(d) (IR 4A) for mercury. Check local advisories before you swim.
Whether Boston Lot 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 Boston Lot Lake
These are the measurements NHDES publishes for Boston Lot 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 Boston Lot Lake
Answers come straight from the public measurements and survey records on this page.
Lake Details
Max depth
22 ft
Average depth
14.4 ft
Surface area
45 acres
Shoreline
1.2 mi
Stays via Stay22
Stays near Boston Lot Lake
Compare lakeside cabins, hotels, and vacation rentals near Boston Lot Lake in Grafton 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.
Top-rated places to stay near Boston Lot Lake
Prices for Oct 16–18, 4 adults. Change dates on the map below.
Availability and prices from Stay22 partners (Booking.com, Vrbo, Expedia). We may earn a commission from bookings, at no extra cost to you.
Follow Boston Lot Lake’s readings
Email me when new measurements post for this lake. Updates stay free.
Or email
Fishing Boston Lot Lake
EPA Impairment Status
Boston Lot Lake is officially listed as impaired under Clean Water Act §303(d) in the 2024 EPA reporting cycle (IR category 4A).
Causes of impairment
Designated uses not supporting: Fish consumption.
A Total Maximum Daily Load (TMDL) plan has been approved.
Source: EPA ATTAINS assessment unit NHLAK801040402-01 · Official waterbody report
Nearby Lakes in Grafton County
Frequently asked questions about Boston Lot Lake
Where is Boston Lot Lake?
- Boston Lot Lake is a lake in Grafton County, New Hampshire. Its water-quality measurements are published by NHDES and shown on this page as reported.
What is the water quality of Boston Lot Lake?
- Boston Lot Lake in Grafton County, New Hampshire has water-quality measurements published by NHDES, shown here as reported. Maximum depth: 22 ft. Surface area: 45 acres.
Is Boston Lot Lake safe to swim in?
- Nutrient and algae readings are not a swimming clearance. Boston Lot Lake is listed impaired under Clean Water Act §303(d) (IR 4A) for mercury. Check local advisories before you swim.
How deep is Boston Lot Lake?
- Boston Lot Lake has a maximum depth of 22 feet and an average depth of 14.4 feet. The lake covers 45 acres.
Explore Boston Lot Lake across LakeQuality
More lakes in New Hampshire
Other Lakes in New Hampshire
Where this data comes from
Measurements for Boston Lot 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