Beaver Pond-Deep Spot
Grafton County, New HampshireView mapDirections
NHDES publishes the water-quality measurements for Beaver Pond-Deep Spot. Here is what has been measured.
- Impaired · Mercury
- Limited data
Beaver Pond-Deep Spot in Grafton County, New Hampshire has water-quality measurements published by NHDES, shown here as reported. Phosphorus: 14.2 µg/L.
Beaver Pond-Deep Spot is a lake in Grafton County, New Hampshire.
Source: EPA Water Quality Portal sampling records, your state environmental agency, last sampled 2025-07-22. Methodology: how these readings are compared.
What Beaver Pond-Deep Spot is good for
From access and monitoring records, not editorial picks.
- Camping2 public campgrounds nearby
Swimming conditions
No readingLimited data
Nutrient and algae readings are not a swimming clearance. Beaver Pond-Deep Spot is listed impaired under Clean Water Act §303(d) (IR 4A) for mercury. Check local advisories before you swim.
Whether Beaver 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 Beaver Pond-Deep Spot
These are the measurements NHDES publishes for Beaver 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 14.2 µg/L. TSI 42.
| 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 | 14.2µg/L | Measured, not scored The nutrient that most limits algae growth in freshwater. More phosphorus, more algae potential. |
| Chlorophyll-a (algae) | No reading 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. | 42 | Mesotrophic OligotrophicMesotrophicEutrophicHypereutrophic |
Moderate nutrients, good water quality
Ask about Beaver Pond-Deep Spot
Answers come straight from the public measurements and survey records on this page.
Recreation & Access
Public campgrounds near Beaver Pond-Deep Spot
- Beaver Brook Shelter1.8 km
- Wildwood3.6 km
Nearest public campgrounds in the USGS National Map inventory, within about 3 miles. An empty list means USGS records no campground that close, which is not the same as camping being unavailable. Where the source gives an official reservation link, it is used; the cabin and hotel search does not cover campsites. More camping lakes
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Stays near Beaver Pond-Deep Spot
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Top-rated places to stay near Beaver Pond-Deep Spot
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Fishing Beaver Pond-Deep Spot
Reservoir Info (USACE NID)
Beaver Pond-Deep Spot is a man-made reservoir impounded by the Beaver Pond (completed 1927), built primarily for fish and wildlife pond on the Wild Ammonoosuc; earth-type dam, 14 ft tall and 220 ft long.
- Normal storage
- 50 ac-ft
- Max storage
- 92 ac-ft
- Hazard class
- Low
- Owner
- USDA FS
All listed purposes: Fish and Wildlife Pond;Recreation.
Source: USACE National Inventory of Dams, NID ID NH00311 · Operator website · Matched by proximity (0.15 km)
EPA Impairment Status
Beaver Pond-Deep Spot is officially listed as impaired under Clean Water Act §303(d) in the 2024 EPA reporting cycle (IR category 4A).
Causes of impairment
Designated uses not supporting: Fish consumption.
A Total Maximum Daily Load (TMDL) plan has been approved.
Source: EPA ATTAINS assessment unit NHLAK801030504-01 · Official waterbody report
Nearby Lakes in Grafton County
Frequently asked questions about Beaver Pond-Deep Spot
Where is Beaver Pond-Deep Spot?
- Beaver Pond-Deep Spot is a lake in Grafton County, New Hampshire. Its water-quality measurements are published by NHDES and shown on this page as reported.
What is the water quality of Beaver Pond-Deep Spot?
- Beaver Pond-Deep Spot in Grafton County, New Hampshire has water-quality measurements published by NHDES, shown here as reported. Phosphorus: 14.2 µg/L.
Is Beaver Pond-Deep Spot safe to swim in?
- Nutrient and algae readings are not a swimming clearance. Beaver Pond-Deep Spot is listed impaired under Clean Water Act §303(d) (IR 4A) for mercury. Check local advisories before you swim.
Are there campgrounds on Beaver Pond-Deep Spot?
- Beaver Pond-Deep Spot has 2 public campgrounds from USGS The National Map within 5 km, including Beaver Brook Shelter, Wildwood. This is a location join, not a booking. Cabins and hotels are listed separately; campsite reservations use the official link when the source provides one.
Explore Beaver Pond-Deep Spot across LakeQuality
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Where this data comes from
5 measurements from 1 monitoring station, 2024–2025. Retrieved from the EPA Water Quality Portal on 2026-08-21.
Collected and reported by
- New Hampshire Department Of Environmental Services (BEACH)
111133005 samples · 2024–2025
Analytical methods
- 10-115-01-1 F ~ LACHAT; Total Phosphorus- Manual persulfate digest
- CHLOROPHYLL A-B-C DETERMINATION (MODIFIED)
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
Public campgrounds from USGS The National Map Structures, within about 3 miles