Where is Mount William Pond?

Mount William 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 Mount William Pond?

Mount William Pond has a maximum depth of 20 feet and an average depth of 14.4 feet. The lake covers 32 acres.

Are there boat ramps on Mount William Pond?

Mount William Pond has 1 documented boat landing in the USGS National Boat Ramps inventory. Named access points include Mount William Pond. Public access is listed as yes.

Can I fish at Mount William Pond?

Mount William Pond has 1 documented boat landing in the USGS National Boat Ramps inventory. Seasons, size and bag limits, and whether you need a license are set by New Hampshire's fish and wildlife agency, so check its current regulations before you go.

Mount William Pond

Hillsborough County, New Hampshire32 acresView map Directions

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

Max depth

20 ft

Bathymetric survey

Area

32 acres

Surface area

Shoreline

1.3 mi

Measured length

Impaired · Mercury
20 ft max depth
Public access

See the measurements Directions Where to stay

Mount William Pond in Hillsborough County, New Hampshire has water-quality measurements published by NHDES, shown here as reported. Maximum depth: 20 ft. Surface area: 32 acres.

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Mount William Pond is a 32-acre lake in Hillsborough County, New Hampshire with a maximum depth of 20 feet (14-foot average). Limited fish-species data available. Public access is available with 1 public boat landing.

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

What Mount William Pond is good for

From access and monitoring records, not editorial picks.

Boat launch1 documented ramp

Swimming conditions

No reading

Not rated

Nutrient and algae readings are not a swimming clearance. Mount William Pond is listed impaired under Clean Water Act §303(d) (IR 4A) for mercury, pH / acidity. Check local advisories before you swim.

Whether Mount William 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 Mount William Pond

These are the measurements NHDES publishes for Mount William 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 Mount William Pond

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

Lake Details

Max depth

20 ft

Average depth

14.4 ft

Surface area

32 acres

Shoreline

1.3 mi

Public access

Yes

Listed by NHDES

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

Recreation & Access

Boat Landings

Yes

Public Access

Mount William PondPublic

Named access points in the USGS National Boat Ramps inventory, within about 3 miles. More lakes with boat ramps

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Stays near Mount William Pond

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Fishing Mount William Pond

→ Mount William Pond fishing regulations (limits, seasons, special rules)

EPA Impairment Status

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

Causes of impairment

MercurypH / acidity

Designated uses not supporting: Aquatic life, Fish consumption.

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

Source: EPA ATTAINS assessment unit NHLAK700060602-02 · Official waterbody report

Nearby Lakes in Hillsborough County

Daniels Lake3.1 miView →Everett Lake3.4 miView →Weare Reservoir-DamOligotrophic3.9 miView →Weare Reservoir-Deep SpotMesotrophic4.1 miView →Weare Reservoir-Collins LandingOligotrophic4.1 miView →Dodge Pond—View →

Frequently asked questions about Mount William Pond

Where is Mount William Pond?: Mount William 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 Mount William Pond?: Mount William Pond in Hillsborough County, New Hampshire has water-quality measurements published by NHDES, shown here as reported. Maximum depth: 20 ft. Surface area: 32 acres.
Is Mount William Pond safe to swim in?: Nutrient and algae readings are not a swimming clearance. Mount William Pond is listed impaired under Clean Water Act §303(d) (IR 4A) for mercury, pH / acidity. Check local advisories before you swim.
How deep is Mount William Pond?: Mount William Pond has a maximum depth of 20 feet and an average depth of 14.4 feet. The lake covers 32 acres.
Are there boat ramps on Mount William Pond?: Mount William Pond has 1 documented boat landing in the USGS National Boat Ramps inventory. Named access points include Mount William Pond. Public access is listed as yes.
Can I fish at Mount William Pond?: Mount William Pond has 1 documented boat landing in the USGS National Boat Ramps inventory. Seasons, size and bag limits, and whether you need a license are set by New Hampshire's fish and wildlife agency, so check its current regulations before you go.