Horseshoe Pond
Merrimack County, New Hampshire39 acresView mapDirections
No nutrient or algae sampling on record from NHDES for this lake.
- Impaired · Algal growth
- 10 ft max depth
Horseshoe Pond in Merrimack County, New Hampshire has water-quality measurements published by NHDES, shown here as reported. Maximum depth: 10 ft. Surface area: 39 acres.
Horseshoe Pond is a 39-acre lake in Merrimack County, New Hampshire with a maximum depth of 10 feet (4-foot average).
Source: EPA Water Quality Portal sampling records, your state environmental agency. Methodology: how these readings are compared.
Swimming conditions
No readingRecreation use not supported
Nutrient and algae readings are not a swimming clearance. Horseshoe Pond is listed impaired under Clean Water Act §303(d) (IR 5) for algal growth, mercury, pH / acidity, salinity / chlorides. Check local advisories before you swim.
Whether Horseshoe 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 Horseshoe Pond
These are the measurements NHDES publishes for Horseshoe 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 Horseshoe Pond
Answers come straight from the public measurements and survey records on this page.
Lake Details
Max depth
10 ft
Average depth
4.3 ft
Surface area
39 acres
Shoreline
2.4 mi
The depth above comes from a bathymetric survey of this lake, not from a regional estimate.
Stays via Stay22
Stays near Horseshoe Pond
Compare lakeside cabins, hotels, and vacation rentals near Horseshoe Pond in Merrimack 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 Horseshoe Pond
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 Horseshoe Pond’s readings
Email me when new measurements post for this lake. Updates stay free.
Or email
Fishing Horseshoe Pond
EPA Impairment Status
Horseshoe 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, Recreation.
A Total Maximum Daily Load (TMDL) plan has been approved.
Source: EPA ATTAINS assessment unit NHLAK700060302-02 · Official waterbody report
Nearby Lakes in Merrimack County
Frequently asked questions about Horseshoe Pond
Where is Horseshoe Pond?
- Horseshoe Pond is a lake in Merrimack County, New Hampshire. Its water-quality measurements are published by NHDES and shown on this page as reported.
What is the water quality of Horseshoe Pond?
- Horseshoe Pond in Merrimack County, New Hampshire has water-quality measurements published by NHDES, shown here as reported. Maximum depth: 10 ft. Surface area: 39 acres.
Is Horseshoe Pond safe to swim in?
- Nutrient and algae readings are not a swimming clearance. Horseshoe Pond is listed impaired under Clean Water Act §303(d) (IR 5) for algal growth, mercury, pH / acidity, salinity / chlorides. Check local advisories before you swim.
How deep is Horseshoe Pond?
- Horseshoe Pond has a maximum depth of 10 feet and an average depth of 4.3 feet. The lake covers 39 acres.
Explore Horseshoe Pond across LakeQuality
More lakes in New Hampshire
Other Lakes in New Hampshire
Where this data comes from
Measurements for Horseshoe 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