Where is Emerson Pond-Deep Spot?

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

Emerson Pond-Deep Spot

Cheshire County, New HampshireView map Directions

NHDES publishes the water-quality measurements for Emerson Pond-Deep Spot. Here is what has been measured.

Phosphorus

14.8 µg/L

Typical for New Hampshire

Measured by NHDES

Chlorophyll-a

12.9 µg/L

More algae than most

Measured by NHDES

Type

Mesotrophic

Trophic class

Mesotrophic
Impaired · Algal growth

See the measurements Directions Where to stay

Emerson Pond-Deep Spot in Cheshire County, New Hampshire has water-quality measurements published by NHDES, shown here as reported. Phosphorus: 14.8 µg/L. Chlorophyll-a (algae): 12.9 µg/L.

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Emerson Pond-Deep Spot is a mesotrophic lake in Cheshire County, New Hampshire. Compared to the 37 other monitored lakes in Cheshire County, Emerson Pond-Deep Spot ranks #19 for water quality.

Source: EPA Water Quality Portal sampling records, your state environmental agency, last sampled 2025-07-15. Methodology: how these readings are compared.

Swimming conditions

Readings only

Low algae

Based on clarity and algae readings from past sampling — there is no live water temperature and a current cyanobacteria reading for this lake. Check your state or county health department before you swim.

Nutrient and algae readings are not a swimming clearance. Emerson Pond-Deep Spot is listed impaired under Clean Water Act §303(d) (IR 5) for algal growth, mercury, nutrients (phosphorus, nitrogen), pH / acidity. Check local advisories before you swim.

Whether Emerson Pond-Deep Spot 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 Emerson Pond-Deep Spot

These are the measurements NHDES publishes for Emerson Pond-Deep Spot, shown as reported. The condition class beside each reading is the EPA National Lakes Assessment class for this lake’s ecoregion.

No clarity data. Phosphorus 14.8 µg/L. Chlorophyll-a 12.9 µg/L. TSI 49.

Water quality readings
Measure	Reading	Where it sits
Water clarity (Secchi depth)		No reading How deep a black-and-white disk stays visible from the surface. Higher is clearer.
Total phosphorus	14.8µg/L	Good GoodFairPoor
Chlorophyll-a (algae)	12.9µg/L	Measured, not scored The green pigment in algae — a direct measure of how much algae is in the water.
Trophic state (TSI)Carlson's 0–100 index of how much algae a lake can support, from clarity, phosphorus and chlorophyll-a.	49	Mesotrophic OligotrophicMesotrophicEutrophicHypereutrophic

Moderate nutrients, good water quality

Ask about Emerson Pond-Deep Spot

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

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Fishing Emerson Pond-Deep Spot

→ Emerson Pond-Deep Spot fishing regulations (limits, seasons, special rules)

EPA Impairment Status

Emerson Pond-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 growthMercuryNutrients (phosphorus, nitrogen)pH / acidity

Designated uses not supporting: Aquatic life, Fish consumption.

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

Source: EPA ATTAINS assessment unit NHLAK802020103-04 · Official waterbody report

Nearby Lakes in Cheshire County

Emerson Pond-Cathedral Beach0.2 miView →Emerson Pond-Wozniak Beach0.4 miView →Grassy Pond—View →Crowcroft Pond—View →Bullet Pond—View →Hubbard Pond—View →

Frequently asked questions about Emerson Pond-Deep Spot

Where is Emerson Pond-Deep Spot?: Emerson Pond-Deep Spot is a lake in Cheshire County, New Hampshire. Its water-quality measurements are published by NHDES and shown on this page as reported.
What is the water quality of Emerson Pond-Deep Spot?: Emerson Pond-Deep Spot in Cheshire County, New Hampshire has water-quality measurements published by NHDES, shown here as reported. Phosphorus: 14.8 µg/L. Chlorophyll-a (algae): 12.9 µg/L.
Is Emerson Pond-Deep Spot safe to swim in?: Nutrient and algae readings are not a swimming clearance. Emerson Pond-Deep Spot is listed impaired under Clean Water Act §303(d) (IR 5) for algal growth, mercury, nutrients (phosphorus, nitrogen), pH / acidity. Check local advisories before you swim.

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