Where is Loch Lyndon?

Loch Lyndon is a lake in Merrimack County, New Hampshire. Its water-quality measurements are published by NHDES and shown on this page as reported.

Loch Lyndon

Merrimack County, New Hampshire121 acresView map Directions

No nutrient or algae sampling on record from NHDES for this lake.

Area

121 acres

Surface area

Shoreline

3.2 mi

Measured length

Impaired · Mercury

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Loch Lyndon in Merrimack County, New Hampshire has water-quality measurements published by NHDES, shown here as reported. Surface area: 121 acres.

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Loch Lyndon is a 121-acre lake in Merrimack County, New Hampshire.

Source: EPA Water Quality Portal sampling records, your state environmental agency. Methodology: how these readings are compared.

Swimming conditions

No reading

Not rated

Nutrient and algae readings are not a swimming clearance. Loch Lyndon is listed impaired under Clean Water Act §303(d) (IR 4A) for mercury. Check local advisories before you swim.

Whether Loch Lyndon 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.

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Water quality measurements for Loch Lyndon

These are the measurements NHDES publishes for Loch Lyndon, 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.

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Answers come straight from the public measurements and survey records on this page.

Lake Details

Surface area

121 acres

Shoreline

3.2 mi

No bathymetric survey has been published for Loch Lyndon, so its depth is not documented here.

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Stays near Loch Lyndon

Compare lakeside cabins, hotels, and vacation rentals near Loch Lyndon 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.

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Fishing Loch Lyndon

→ Loch Lyndon fishing regulations (limits, seasons, special rules)

EPA Impairment Status

Loch Lyndon is officially listed as impaired under Clean Water Act §303(d) in the 2024 EPA reporting cycle (IR category 4A).

Causes of impairment

Mercury

Designated uses not supporting: Fish consumption.

A Total Maximum Daily Load (TMDL) plan has been approved.

Source: EPA ATTAINS assessment unit NHIMP700030301-03 · Official waterbody report

Nearby Lakes in Merrimack County

Todd Lake-Deep SpotMesotrophic1.9 miView →Russell Pond-Deep SpotMesotrophic1.5 miView →Billings Pond2 miView →Blaisdell Lake-Deep SpotMesotrophic1.9 miView →Gile Pond3.5 miView →Kezar Lake-Deep SpotMesotrophic—View →

Frequently asked questions about Loch Lyndon

Where is Loch Lyndon?: Loch Lyndon 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 Loch Lyndon?: Loch Lyndon in Merrimack County, New Hampshire has water-quality measurements published by NHDES, shown here as reported. Surface area: 121 acres.
Is Loch Lyndon safe to swim in?: Nutrient and algae readings are not a swimming clearance. Loch Lyndon is listed impaired under Clean Water Act §303(d) (IR 4A) for mercury. Check local advisories before you swim.