White Oak Pond
White Oak Pond in Grafton County, New Hampshire has a water quality grade of B (Good). Phosphorus: 14.5 µg/L. Surface area: 295 acres.
- Area
- 295 acres
- Type
- Mesotrophic
White Oak Pond is a 295-acre mesotrophic lake in Grafton County, New Hampshire. Water quality is graded B based on 1 sampling years through 2025. Compared to the 26 other monitored lakes in Grafton County, White Oak Pond ranks #11 for water quality.
Source: EPA Water Quality Portal sampling records, your state environmental agency, last sampled 2025-08-17. 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.
Good for swimming, clear water with low algae levels
Water Quality Grade: B (Good)
No clarity data. Phosphorus level: 14.5 µg/L. Trophic State Index: 43.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | No recent samples | |
| Phosphorus | 14.5 µg/L | Good |
| Chlorophyll-a (Algae) | No recent samples | |
| Trophic State Index (TSI) | 43 | Mesotrophic |
Moderate nutrients, good water quality
Where to stay near White Oak Pond
Compare lakeside cabins, hotels, and vacation rentals near White Oak Pond in Grafton 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.
Top-rated places to stay near White Oak Pond
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Lake Details
| Characteristic | Value |
|---|---|
| Surface Area | 295 acres |
No bathymetric survey has been published for White Oak Pond, so its depth is not documented here.
Fishing White Oak Pond
Reservoir Info (USACE NID)
White Oak Pond is a man-made reservoir impounded by the White Oak Pond Dam (completed 1920), built primarily for recreation on the White Owl Brook; earth-type dam, 8 ft tall and 50 ft long.
- Surface area
- 295 ac
- Normal storage
- 684 ac-ft
- Max storage
- 976 ac-ft
- Drainage area
- 4.58 sq mi
- Hazard class
- Low
- Owner
- TOWN OF HOLDERNESS
Source: USACE National Inventory of Dams, NID ID NH00463 · Operator website
EPA Impairment Status
White Oak Pond 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 NHLAK700010501-05 · Official waterbody report
County Ranking
Ranked #11 of 27 lakes in Grafton County
Nearby Lakes in Grafton County
Frequently asked questions about White Oak Pond
Where is White Oak Pond?
- White Oak Pond is a lake in Grafton County, New Hampshire. LakeQuality grades it B for nutrients and algae. The letter is not a swimming clearance.
What is the water quality grade for White Oak Pond?
- White Oak Pond in Grafton County, New Hampshire has a water quality grade of B (Good). Phosphorus: 14.5 µg/L. Surface area: 295 acres.
Is White Oak Pond safe to swim in?
- Good for swimming, clear water with low algae levels. White Oak Pond has a water quality grade of B (Good). Always check local health department advisories before swimming.
Explore White Oak Pond 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 B Lakes in New Hampshire
Mesotrophic Lakes in New Hampshire
Where this data comes from
17 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)
1111330017 samples · 2020–2025
Analytical methods
- 10-115-01-1 F ~ LACHAT; Total Phosphorus- Manual persulfate digest
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