Where is Diamond Pond?

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

How deep is Diamond Pond?

Diamond Pond has a maximum depth of 100 feet and an average depth of 36.4 feet. The lake covers 181 acres.

Are there boat ramps on Diamond Pond?

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

Can I fish at Diamond Pond?

Diamond 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.

Diamond Pond

Coos County, New Hampshire181 acresView map Directions

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

Max depth

100 ft

Bathymetric survey

Area

181 acres

Surface area

Shoreline

2.7 mi

Measured length

Impaired · Mercury
100 ft max depth
Public access

See the measurements Directions Where to stay

Diamond Pond in Coos County, New Hampshire has water-quality measurements published by NHDES, shown here as reported. Maximum depth: 100 ft. Surface area: 181 acres.

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Diamond Pond is a 181-acre lake in Coos County, New Hampshire with a maximum depth of 100 feet (36-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 Diamond Pond is good for

From access and monitoring records, not editorial picks.

Boat launch1 documented ramp
Deep water100 ft surveyed max depth

Swimming conditions

No reading

Not rated

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

Whether Diamond 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 Diamond Pond

These are the measurements NHDES publishes for Diamond 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 Diamond Pond

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

Lake Details

Max depth

100 ft

Average depth

36.4 ft

Surface area

181 acres

Shoreline

2.7 mi

Public access

Yes

Listed by NHDES

Recreation & Access

Boat Landings

Yes

Public Access

NugentPublic

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 Diamond Pond

Compare lakeside cabins, hotels, and vacation rentals near Diamond Pond in Coos 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 Diamond Pond

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Fishing Diamond Pond

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

EPA Impairment Status

Diamond 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 NHLAK400010403-01 · Official waterbody report

Nearby Lakes in Coos County

Little Diamond Pond0.8 miView →Mud Pond3.5 miView →Lake Gloriette5.9 miView →Lake Francis6.7 miView →Back Lake8.9 miView →First Connecticut Lake-Deep Spot9.7 miView →

Frequently asked questions about Diamond Pond

Where is Diamond Pond?: Diamond Pond is a lake in Coos County, New Hampshire. Its water-quality measurements are published by NHDES and shown on this page as reported.
What is the water quality of Diamond Pond?: Diamond Pond in Coos County, New Hampshire has water-quality measurements published by NHDES, shown here as reported. Maximum depth: 100 ft. Surface area: 181 acres.
Is Diamond Pond safe to swim in?: Nutrient and algae readings are not a swimming clearance. Diamond Pond is listed impaired under Clean Water Act §303(d) (IR 4A) for mercury. Check local advisories before you swim.
How deep is Diamond Pond?: Diamond Pond has a maximum depth of 100 feet and an average depth of 36.4 feet. The lake covers 181 acres.
Are there boat ramps on Diamond Pond?: Diamond Pond has 1 documented boat landing in the USGS National Boat Ramps inventory. Named access points include Nugent. Public access is listed as yes.
Can I fish at Diamond Pond?: Diamond 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.