Where is Gillan Pond?

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

Gillan Pond

Belknap County, New Hampshire43 acresView map Directions

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

Area

43 acres

Surface area

Shoreline

1.9 mi

Measured length

Impaired · Mercury

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Gillan Pond in Belknap County, New Hampshire has water-quality measurements published by NHDES, shown here as reported. Surface area: 43 acres.

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Gillan Pond is a 43-acre lake in Belknap 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. Gillan Pond is listed impaired under Clean Water Act §303(d) (IR 4A) for mercury. Check local advisories before you swim.

Whether Gillan 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.

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Water quality measurements for Gillan Pond

These are the measurements NHDES publishes for Gillan 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 Gillan Pond

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

Lake Details

Surface area

43 acres

Shoreline

1.9 mi

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

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Stays near Gillan Pond

Compare lakeside cabins, hotels, and vacation rentals near Gillan Pond in Belknap 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 Gillan Pond

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Fishing Gillan Pond

→ Gillan Pond fishing regulations (limits, seasons, special rules)

EPA Impairment Status

Gillan Pond 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 NHLAK700060401-13 · Official waterbody report

Nearby Lakes in Belknap County

Manning Lake1 miView →Lake Eileen1.1 miView →Crystal Lake-Deep SpotMesotrophic2 miView →Sunset Lake1.8 miView →Hills Pond-Deep SpotMesotrophic2.1 miView →Round Pond3.2 miView →

Frequently asked questions about Gillan Pond

Where is Gillan Pond?: Gillan Pond is a lake in Belknap County, New Hampshire. Its water-quality measurements are published by NHDES and shown on this page as reported.
What is the water quality of Gillan Pond?: Gillan Pond in Belknap County, New Hampshire has water-quality measurements published by NHDES, shown here as reported. Surface area: 43 acres.
Is Gillan Pond safe to swim in?: Nutrient and algae readings are not a swimming clearance. Gillan Pond is listed impaired under Clean Water Act §303(d) (IR 4A) for mercury. Check local advisories before you swim.