Where is Powder Mill Pond?

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

How deep is Powder Mill Pond?

Powder Mill Pond has a maximum depth of 15 feet and an average depth of 3.3 feet. The lake covers 419 acres.

Powder Mill Pond

Hillsborough County, New Hampshire419 acresView map Directions

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

Max depth

15 ft

Bathymetric survey

Area

419 acres

Surface area

Shoreline

9.9 mi

Measured length

Impaired · Algal growth
15 ft max depth

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Powder Mill Pond in Hillsborough County, New Hampshire has water-quality measurements published by NHDES, shown here as reported. Maximum depth: 15 ft. Surface area: 419 acres.

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Powder Mill Pond is a 419-acre lake in Hillsborough County, New Hampshire with a maximum depth of 15 feet (3-foot average).

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

Swimming conditions

No reading

Recreation use not supported

Nutrient and algae readings are not a swimming clearance. Powder Mill Pond is listed impaired under Clean Water Act §303(d) (IR 5) for algal growth, mercury, metals (other than mercury), nuisance exotic species, oxygen depletion (low DO), pH / acidity. Check local advisories before you swim.

Whether Powder Mill 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 Powder Mill Pond

These are the measurements NHDES publishes for Powder Mill 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.

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

Lake Details

Max depth

15 ft

Average depth

3.3 ft

Surface area

419 acres

Shoreline

9.9 mi

The depth above comes from a bathymetric survey of this lake, not from a regional estimate.

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Stays near Powder Mill Pond

Compare lakeside cabins, hotels, and vacation rentals near Powder Mill Pond in Hillsborough 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 Powder Mill Pond

→ Powder Mill Pond fishing regulations (limits, seasons, special rules)

EPA Impairment Status

Powder Mill Pond is officially listed as impaired under Clean Water Act §303(d) in the 2024 EPA reporting cycle (IR category 5).

Causes of impairment

Algal growthMercuryMetals (other than mercury)Nuisance exotic speciesOxygen depletion (low DO)pH / acidity

Designated uses not supporting: Aquatic life, Fish consumption, Recreation.

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

Source: EPA ATTAINS assessment unit NHLAK700030107-03 · Official waterbody report

Nearby Lakes in Hillsborough County

Whittemore Lake1.6 miView →Otter Lake2 miView →Norway Pond-Deep SpotMesotrophic2.7 miView →Sunset Lake2.8 miView →Halfmoon Pond4.2 miView →Gregg Lake-Deep SpotMesotrophic4.7 miView →

Frequently asked questions about Powder Mill Pond

Where is Powder Mill Pond?: Powder Mill Pond is a lake in Hillsborough County, New Hampshire. Its water-quality measurements are published by NHDES and shown on this page as reported.
What is the water quality of Powder Mill Pond?: Powder Mill Pond in Hillsborough County, New Hampshire has water-quality measurements published by NHDES, shown here as reported. Maximum depth: 15 ft. Surface area: 419 acres.
Is Powder Mill Pond safe to swim in?: Nutrient and algae readings are not a swimming clearance. Powder Mill Pond is listed impaired under Clean Water Act §303(d) (IR 5) for algal growth, mercury, metals (other than mercury), nuisance exotic species, oxygen depletion (low DO), pH / acidity. Check local advisories before you swim.
How deep is Powder Mill Pond?: Powder Mill Pond has a maximum depth of 15 feet and an average depth of 3.3 feet. The lake covers 419 acres.