Hawkins Pond-Deep Spot
Belknap County, New Hampshire93 acresView mapDirections
NHDES publishes the water-quality measurements for Hawkins Pond-Deep Spot. Here is what has been measured.
- Mesotrophic
- Impaired · Mercury
Hawkins Pond-Deep Spot in Belknap County, New Hampshire has water-quality measurements published by NHDES, shown here as reported. Phosphorus: 17.5 µg/L. Chlorophyll-a (algae): 4.7 µg/L. Surface area: 93 acres.
Hawkins Pond-Deep Spot is a 93-acre mesotrophic lake in Belknap County, New Hampshire. Compared to the 26 other monitored lakes in Belknap County, Hawkins Pond-Deep Spot ranks #23 for water quality.
Source: EPA Water Quality Portal sampling records, your state environmental agency, last sampled 2025-08-19. Methodology: how these readings are compared.
Swimming conditions
Readings onlyModerate 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. Hawkins Pond-Deep Spot is listed impaired under Clean Water Act §303(d) (IR 5) for mercury, oxygen depletion (low DO), pH / acidity. Check local advisories before you swim.
Whether Hawkins 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.
Water quality measurements for Hawkins Pond-Deep Spot
These are the measurements NHDES publishes for Hawkins 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 17.5 µg/L. Chlorophyll-a 4.7 µg/L. TSI 46.
| 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 | 17.5µg/L | Fair GoodFairPoor |
| Chlorophyll-a (algae) | 4.7µg/L | Fair GoodFairPoor |
| Trophic state (TSI)Carlson's 0–100 index of how much algae a lake can support, from clarity, phosphorus and chlorophyll-a. | 46 | Mesotrophic OligotrophicMesotrophicEutrophicHypereutrophic |
Moderate nutrients, good water quality
Ask about Hawkins Pond-Deep Spot
Answers come straight from the public measurements and survey records on this page.
Lake Details
Surface area
93 acres
No bathymetric survey has been published for Hawkins Pond-Deep Spot, so its depth is not documented here.
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Fishing Hawkins Pond-Deep Spot
Reservoir Info (USACE NID)
Hawkins Pond-Deep Spot is a man-made reservoir impounded by the Hawkins Pond Dam (completed 1873), built primarily for recreation on the Hawkins Pond Brook; earth-type dam, 12 ft tall and 100 ft long.
- Surface area
- 93 ac
- Normal storage
- 350 ac-ft
- Max storage
- 370 ac-ft
- Drainage area
- 1.7 sq mi
- Hazard class
- Significant
- Owner
- NH DES WATER DIVISION
Source: USACE National Inventory of Dams, NID ID NH00334 · Operator website · Matched by proximity (0.63 km)
EPA Impairment Status
Hawkins 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
Designated uses not supporting: Aquatic life, Fish consumption.
A Total Maximum Daily Load (TMDL) plan has been approved.
Source: EPA ATTAINS assessment unit NHLAK700020108-04 · Official waterbody report
Nearby Lakes in Belknap County
Frequently asked questions about Hawkins Pond-Deep Spot
Where is Hawkins Pond-Deep Spot?
- Hawkins Pond-Deep Spot 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 Hawkins Pond-Deep Spot?
- Hawkins Pond-Deep Spot in Belknap County, New Hampshire has water-quality measurements published by NHDES, shown here as reported. Phosphorus: 17.5 µg/L. Chlorophyll-a (algae): 4.7 µg/L. Surface area: 93 acres.
Is Hawkins Pond-Deep Spot safe to swim in?
- Nutrient and algae readings are not a swimming clearance. Hawkins Pond-Deep Spot is listed impaired under Clean Water Act §303(d) (IR 5) for mercury, oxygen depletion (low DO), pH / acidity. Check local advisories before you swim.
Explore Hawkins Pond-Deep Spot across LakeQuality
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Where this data comes from
63 measurements from 1 monitoring station, 2020–2025. Retrieved from the EPA Water Quality Portal on 2026-08-21.
Collected and reported by
- New Hampshire Department Of Environmental Services (BEACH)
1111330063 samples · 2020–2025
Analytical methods
- 10-115-01-1 F ~ LACHAT; Total Phosphorus- Manual persulfate digest
- CHLOROPHYLL A-B-C DETERMINATION (MODIFIED)
- 2130 B ~ Nephelometric Method
Monitoring station identifiers (1)
EPA condition classes from the National Lakes Assessment (EPA 841-R-24-006, Table 6-3), applied by ecoregion. See where the data comes from and data sources.
Other records on this page
Impairment status from EPA ATTAINS 303(d) database