Eastman Pond-Deep Spot
Eastman Pond-Deep Spot in Sullivan County, New Hampshire has a water quality grade of A (Excellent). Phosphorus: 7.6 µg/L. Chlorophyll-a (algae): 3 µg/L. Surface area: 335 acres.
- Area
- 335 acres
- Type
- Mesotrophic
- Public access
- Yes
Eastman Pond-Deep Spot is a 335-acre mesotrophic lake in Sullivan County, New Hampshire. Water quality is graded A based on 2 sampling years through 2022. Limited fish-species data available. Public access is available with 1 public boat landing. Compared to the 23 other monitored lakes in Sullivan County, Eastman Pond-Deep Spot ranks #8 for water quality.
Source: EPA Water Quality Portal sampling records, your state environmental agency, last sampled 2022-09-18. Grade methodology: LakeGrade methodology.
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Swimming Safety
Grade onlyLow algae
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.
Excellent for swimming, crystal clear water with minimal algae
Water Quality Grade: A (Excellent)
No clarity data. Phosphorus level: 7.6 µg/L. Chlorophyll-a: 3 µg/L. Trophic State Index: 37.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | No recent samples | |
| Phosphorus | 7.6 µg/L | Good |
| Chlorophyll-a (Algae) | 3 µg/L | Good |
| Trophic State Index (TSI) | 37 | Mesotrophic |
Moderate nutrients, good water quality
Where to stay near Eastman Pond-Deep Spot
Compare lakeside cabins, hotels, and vacation rentals near Eastman Pond-Deep Spot in Sullivan 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.
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Lake Details
| Characteristic | Value |
|---|---|
| Surface Area | 335 acres |
| Public Access | Yes |
No bathymetric survey has been published for Eastman Pond-Deep Spot, so its depth is not documented here.
Recreation & Access
- McDaniels Marsh Waterfowl Management AreaPublic
Named access points from the USGS National Boat Ramps inventory, snapped within 5 km. More lakes with boat ramps
Fishing Eastman Pond-Deep Spot
Reservoir Info (USACE NID)
Eastman Pond-Deep Spot is a man-made reservoir impounded by the Eastman Lake Dam (completed 1972), built primarily for recreation on the Eastman Brook; earth-type dam, 35 ft tall and 415 ft long.
- Surface area
- 335 ac
- Normal storage
- 2,100 ac-ft
- Max storage
- 9,930 ac-ft
- Drainage area
- 7.5 sq mi
- Hazard class
- High
- Owner
- EASTMAN COMMUNITY ASSOCIATION
Source: USACE National Inventory of Dams, NID ID NH00039 · Operator website · Matched by proximity (0.81 km)
EPA Impairment Status
Eastman 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
A Total Maximum Daily Load (TMDL) plan has been approved.
Source: EPA ATTAINS assessment unit NHLAK801060401-06 · Official waterbody report · Matched by proximity (0.75 km)
County Ranking
Ranked #8 of 24 lakes in Sullivan County
Nearby Lakes in Sullivan County
Frequently asked questions about Eastman Pond-Deep Spot
Where is Eastman Pond-Deep Spot?
- Eastman Pond-Deep Spot is a lake in Sullivan County, New Hampshire. LakeQuality grades it A for nutrients and algae. The letter is not a swimming clearance.
What is the water quality grade for Eastman Pond-Deep Spot?
- Eastman Pond-Deep Spot in Sullivan County, New Hampshire has a water quality grade of A (Excellent). Phosphorus: 7.6 µg/L. Chlorophyll-a (algae): 3 µg/L. Surface area: 335 acres.
Is Eastman Pond-Deep Spot safe to swim in?
- Excellent for swimming, crystal clear water with minimal algae. Eastman Pond-Deep Spot has a water quality grade of A (Excellent). Algae concentration (chlorophyll-a) is 3 µg/L. Always check local health department advisories before swimming.
Are there boat ramps on Eastman Pond-Deep Spot?
- Eastman Pond-Deep Spot has 1 documented boat landing in the USGS National Boat Ramps inventory. Named access points include McDaniels Marsh Waterfowl Management Area. Public access is listed as yes.
Explore Eastman Pond-Deep Spot across LakeGrade
More New Hampshire Lake Rankings
Top 25 by overall water quality score
Top 25 by Secchi water clarity
Grade A/B + low algae filter
Panfish-rich, public access
Full state directory
Other Grade A Lakes in New Hampshire
Mesotrophic Lakes in New Hampshire
Where this data comes from
18 measurements from 1 monitoring station, 2020–2022. Retrieved from the EPA Water Quality Portal on 2026-08-21.
Collected and reported by
- New Hampshire Department Of Environmental Services (BEACH)
1111330018 samples · 2020–2022
Analytical methods
- 10-115-01-1 F ~ LACHAT; Total Phosphorus- Manual persulfate digest
- CHLOROPHYLL A-B-C DETERMINATION (MODIFIED)
Monitoring station identifiers (1)
Grade thresholds from the EPA National Lakes Assessment (EPA 841-R-24-006, Table 6-3), applied by ecoregion. See how grades are calculated and data sources.
Other records on this page
Impairment status from EPA ATTAINS 303(d) database
Named boat-access points from the USGS National Boat Ramps inventory