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

How deep is Lily Lake?

Lily Lake has a maximum depth of 5 feet. The lake covers 38 acres.

Are there boat ramps on Lily Lake?

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

Can I fish at Lily Lake?

Lily Lake 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.

Lily Lake

Belknap County, New Hampshire38 acresView map Directions

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

Max depth

5 ft

Bathymetric survey

Area

38 acres

Surface area

Shoreline

1.1 mi

Measured length

Impaired · Mercury
5 ft max depth
Public access

See the measurements Directions Where to stay

Lily Lake in Belknap County, New Hampshire has water-quality measurements published by NHDES, shown here as reported. Maximum depth: 5 ft. Surface area: 38 acres.

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Lily Lake is a 38-acre lake in Belknap County, New Hampshire with a maximum depth of 5 feet. 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 Lily Lake 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. Lily Lake is listed impaired under Clean Water Act §303(d) (IR 4A) for mercury. Check local advisories before you swim.

Whether Lily Lake 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 Lily Lake

These are the measurements NHDES publishes for Lily Lake, 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 Lily Lake

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

Lake Details

Max depth

5 ft

Surface area

38 acres

Shoreline

1.1 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

Lily LakePublic

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 Lily Lake

Compare lakeside cabins, hotels, and vacation rentals near Lily Lake 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 Lily Lake

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Fishing Lily Lake

→ Lily Lake fishing regulations (limits, seasons, special rules)

EPA Impairment Status

Lily Lake 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 NHLAK700060501-04 · Official waterbody report

Nearby Lakes in Belknap County

Lougee Pond1.8 miView →Rollins Pond2.9 miView →Huntress Pond2.7 miView →Lower Suncook Pond-Deep SpotOligotrophic3.8 miView →Upper Suncook Pond-Deep SpotMesotrophic—View →Loon Pond-Deep SpotMesotrophic—View →

Frequently asked questions about Lily Lake

Where is Lily Lake?: Lily Lake 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 Lily Lake?: Lily Lake in Belknap County, New Hampshire has water-quality measurements published by NHDES, shown here as reported. Maximum depth: 5 ft. Surface area: 38 acres.
Is Lily Lake safe to swim in?: Nutrient and algae readings are not a swimming clearance. Lily Lake is listed impaired under Clean Water Act §303(d) (IR 4A) for mercury. Check local advisories before you swim.
How deep is Lily Lake?: Lily Lake has a maximum depth of 5 feet. The lake covers 38 acres.
Are there boat ramps on Lily Lake?: Lily Lake has 1 documented boat landing in the USGS National Boat Ramps inventory. Named access points include Lily Lake. Public access is listed as yes.
Can I fish at Lily Lake?: Lily Lake 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.