Conner Pond
Conner Pond in Carroll County, New Hampshire is not rated for water quality — its monitoring record does not meet the evidence bar. Water clarity: 41 ft visibility.
- Clarity
- 41 ft
Why Conner Pond 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 Conner Pond, no nutrient or algae measurement meets the evidence bar (at least 3 samples within 10 years). Sampling here has recorded water clarity, but not phosphorus 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.
Conner Pond is a lake in Carroll County, New Hampshire.
Source: EPA Water Quality Portal sampling records, your state environmental agency, last sampled 2020-07-31. Grade methodology: LakeGrade methodology.
Watch Conner Pond water quality
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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 Conner Pond
These readings exist but do not meet the evidence bar for an A–F grade — see why.
Crystal clear, you can see 41 ft down. Trophic State Index: 24.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 41 ft | Not graded |
| Phosphorus | No recent samples | |
| Chlorophyll-a (Algae) | No recent samples | |
| Trophic State Index (TSI) | 24 | Oligotrophic |
Low nutrients, clear water, excellent for swimming
Where to stay near Conner Pond
Compare lakeside cabins, hotels, and vacation rentals near Conner Pond in Carroll 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 Conner Pond
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Fishing Conner Pond
EPA Impairment Status
Conner Pond is officially listed as impaired under Clean Water Act §303(d) in the 2024 EPA reporting cycle (IR category 4A).
Causes of impairment
A Total Maximum Daily Load (TMDL) plan has been approved.
Source: EPA ATTAINS assessment unit NHLAK600020802-02 · Official waterbody report
Graded lakes near Conner Pond
Conner Pond has no grade, but these lakes within a short drive do.
Nearby Lakes in Carroll County
Frequently asked questions about Conner Pond
Where is Conner Pond?
- Conner Pond is a lake in Carroll 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 Conner Pond?
- Conner Pond in Carroll County, New Hampshire is not rated for water quality — its monitoring record does not meet the evidence bar. Water clarity: 41 ft visibility.
Is Conner Pond safe to swim in?
- Not rated for swimming — there is not enough monitoring data to judge this lake. Conner Pond is not rated for water quality — its monitoring record does not meet the evidence bar. Always check local health department advisories before swimming.
Explore Conner 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 Lakes in New Hampshire
Oligotrophic Lakes in New Hampshire
Where this data comes from
1 measurement from 1 monitoring station, 2020. Retrieved from the EPA Water Quality Portal on 2026-08-21.
Collected and reported by
- North American Lake Management Society
NALMS1 sample · 2020
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