Where is Pearly Lake-Deep Spot?

Pearly Lake-Deep Spot is a lake in Cheshire County, New Hampshire. LakeQuality grades it D for nutrients and algae. The letter is not a swimming clearance.

Is Pearly Lake-Deep Spot safe to swim in?

Nutrients and algae run higher than average — check local advisories before swimming, and skip the water if you see scum. Pearly Lake-Deep Spot has a water quality grade of D (Nutrient-rich). Algae concentration (chlorophyll-a) is 8.3 µg/L. Always check local health department advisories before swimming.

Pearly Lake-Deep Spot

Grade D — Nutrient-rich

Nutrient-rich · #37 of 38 lakes in the county · Eutrophic · 210 acres

Eutrophic

Pearly Lake-Deep Spot in Cheshire County, New Hampshire has a water quality grade of D (Nutrient-rich). Phosphorus: 29.7 µg/L. Chlorophyll-a (algae): 8.3 µg/L. Surface area: 210 acres.

Area: 210 acres
Type: Eutrophic

Grade D measures nutrients and algae, not whether this is a good place for a cabin trip. Cabins and rentals near Pearly Lake-Deep Spot →

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Pearly Lake-Deep Spot is a 210-acre productive, nutrient-rich eutrophic lake in Cheshire County, New Hampshire. Water quality is graded D based on 1 sampling years through 2025. Compared to the 37 other monitored lakes in Cheshire County, Pearly Lake-Deep Spot ranks #37 for water quality.

Source: EPA Water Quality Portal sampling records, your state environmental agency, last sampled 2025-09-01. Grade methodology: LakeGrade methodology.

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Swimming Safety

Grade only

Bacteria advisory

Based on clarity and algae grades from past sampling — we do not hold live water temperature and a current cyanobacteria reading for this lake. Check your state or county health department before you swim.

Nutrients and algae run higher than average — check local advisories before swimming, and skip the water if you see scum

Compare the safest swimming lakes near Albany →

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Water Quality Grade: D (Nutrient-rich)

No clarity data. Phosphorus level: 29.7 µg/L. Chlorophyll-a: 8.3 µg/L. Trophic State Index: 52.

Metric	Value	Grade
Water Clarity (Secchi Depth)	No recent samples
Phosphorus	29.7 µg/L	Poor
Chlorophyll-a (Algae)	8.3 µg/L	Not graded
Trophic State Index (TSI)	52	Eutrophic

High nutrients, frequent algae, reduced clarity

Where to stay near Pearly Lake-Deep Spot

Compare lakeside cabins, hotels, and vacation rentals near Pearly Lake-Deep Spot in Cheshire 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. The water-quality grade measures nutrients and algae, not lodging — cabins and rentals around Pearly Lake-Deep Spot are listed below.

Top-rated places to stay near Pearly Lake-Deep Spot

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Lake Details

Characteristic	Value
Surface Area	210 acres

No bathymetric survey has been published for Pearly Lake-Deep Spot, so its depth is not documented here.

Fishing Pearly Lake-Deep Spot

→ Pearly Lake-Deep Spot fishing regulations (limits, seasons, special rules)

Reservoir Info (USACE NID)

Pearly Lake-Deep Spot is a man-made reservoir impounded by the Pearly Pond Dam (completed 1935), built primarily for recreation on the Tarbell Brook; concrete-type dam, 7 ft tall and 120 ft long.

Surface area: 210 ac
Normal storage: 500 ac-ft
Max storage: 750 ac-ft
Drainage area: 2.8 sq mi
Hazard class: Low
Owner: PEARLY POND ASSOCIATION

Source: USACE National Inventory of Dams, NID ID NH00383 · Operator website · Matched by proximity (0.3 km)

EPA Impairment Status

Pearly Lake-Deep Spot is officially listed as impaired under Clean Water Act §303(d) in the 2024 EPA reporting cycle (IR category 5).

Causes of impairment

Algal growthBiotoxinsMercuryNuisance exotic speciesOxygen depletion (low DO)pH / acidity

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

Source: EPA ATTAINS assessment unit NHLAK802020103-08 · Official waterbody report · Matched by proximity (0.74 km)

County Ranking

Ranked #37 of 38 lakes in Cheshire County

Nearby Lakes in Cheshire County

BPool Pond-Deep SpotMesotrophicView →AGilmore Pond-Deep SpotMesotrophicView →NRContoocook Lake-South EndView →NRContoocook Lake DamView →AContoocook Lake-Deep SpotMesotrophicView →NRNutting Road Bridge LakeView →

Frequently asked questions about Pearly Lake-Deep Spot

Where is Pearly Lake-Deep Spot?: Pearly Lake-Deep Spot is a lake in Cheshire County, New Hampshire. LakeQuality grades it D for nutrients and algae. The letter is not a swimming clearance.
What is the water quality grade for Pearly Lake-Deep Spot?: Pearly Lake-Deep Spot in Cheshire County, New Hampshire has a water quality grade of D (Nutrient-rich). Phosphorus: 29.7 µg/L. Chlorophyll-a (algae): 8.3 µg/L. Surface area: 210 acres.
Is Pearly Lake-Deep Spot safe to swim in?: Nutrients and algae run higher than average — check local advisories before swimming, and skip the water if you see scum. Pearly Lake-Deep Spot has a water quality grade of D (Nutrient-rich). Algae concentration (chlorophyll-a) is 8.3 µg/L. Always check local health department advisories before swimming.

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