French Pond-Deep Spot
French Pond-Deep Spot in Grafton County, New Hampshire is not rated for water quality — its monitoring record does not meet the evidence bar. Phosphorus: 23.7 µg/L.
- Public access
- Yes
Why French Pond-Deep Spot has no grade
We grade a lake only when its monitoring record clears the evidence bar: at least three phosphorus or chlorophyll-a samples in the last ten years, scored against EPA National Lakes Assessment thresholds for this lake’s ecoregion. For French Pond-Deep Spot, no nutrient or algae measurement meets the evidence bar (at least 3 samples within 10 years). Sampling here has recorded phosphorus, but not water clarity and algae (chlorophyll-a).
Not Rated is not an F. It is EPA Integrated Reporting Category 3 — insufficient information. The water here may be excellent or poor; nobody has measured enough of it to say. Everything below that has been measured is still reported on this page.
Sampling is run by your state environmental agency and volunteer programs, and published through the EPA Water Quality Portal. Read the full grading methodology.
French Pond-Deep Spot is a lake in Grafton County, New Hampshire. Limited fish-species data available. Public access is available with 1 public boat landing.
Source: EPA Water Quality Portal sampling records, your state environmental agency, last sampled 2025-08-20. Grade methodology: LakeGrade methodology.
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Swimming Safety
Not ratedLimited data
Not rated for swimming — there is not enough monitoring data to judge this lake
Water quality measurements for French Pond-Deep Spot
These readings exist but do not meet the evidence bar for an A–F grade — see why.
No clarity data. Phosphorus level: 23.7 µg/L. Trophic State Index: 50.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | No recent samples | |
| Phosphorus | 23.7 µg/L | Not graded |
| Chlorophyll-a (Algae) | No recent samples | |
| Trophic State Index (TSI) | 50 | Mesotrophic |
Moderate nutrients, good water quality
Where to stay near French Pond-Deep Spot
Compare lakeside cabins, hotels, and vacation rentals near French Pond-Deep Spot 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 French Pond-Deep Spot
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Recreation & Access
- French PondPublic
Named access points from the USGS National Boat Ramps inventory, snapped within 5 km. More lakes with boat ramps
Fishing French Pond-Deep Spot
EPA Impairment Status
French 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 NHLAK801030703-01 · Official waterbody report · Matched by proximity (0.14 km)
Graded lakes near French Pond-Deep Spot
French Pond-Deep Spot has no grade, but these lakes within a short drive do.
Nearby Lakes in Grafton County
Frequently asked questions about French Pond-Deep Spot
Where is French Pond-Deep Spot?
- French Pond-Deep Spot is a lake in Grafton County, New Hampshire. LakeQuality has not rated this lake (UNRATED) — there is not enough recent sampling to assign a letter.
What is the water quality grade for French Pond-Deep Spot?
- French Pond-Deep Spot in Grafton County, New Hampshire is not rated for water quality — its monitoring record does not meet the evidence bar. Phosphorus: 23.7 µg/L.
Is French Pond-Deep Spot safe to swim in?
- Not rated for swimming — there is not enough monitoring data to judge this lake. French Pond-Deep Spot is not rated for water quality — its monitoring record does not meet the evidence bar. Always check local health department advisories before swimming.
Are there boat ramps on French Pond-Deep Spot?
- French Pond-Deep Spot has 1 documented boat landing in the USGS National Boat Ramps inventory. Named access points include French Pond. Public access is listed as yes.
Explore French 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 Lakes in New Hampshire
Mesotrophic Lakes in New Hampshire
Where this data comes from
4 measurements from 1 monitoring station, 2025. Retrieved from the EPA Water Quality Portal on 2026-08-21.
Collected and reported by
- New Hampshire Department Of Environmental Services (BEACH)
111133004 samples · 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
Named boat-access points from the USGS National Boat Ramps inventory