Kolelemook Lake
Kolelemook Lake in Sullivan County, New Hampshire is not rated for water quality — its monitoring record does not meet the evidence bar. Water clarity: 19.8 ft visibility.
- Clarity
- 19.8 ft
- Public access
- Yes
Why Kolelemook Lake 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 Kolelemook Lake, the only measurement available is water clarity, which is not a water-quality indicator on its own — EPA's National Lakes Assessment does not grade clarity. 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.
Kolelemook Lake is a lake in Sullivan 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 2022-07-11. 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 Kolelemook Lake
These readings exist but do not meet the evidence bar for an A–F grade — see why.
Crystal clear, you can see 19.8 ft down. Trophic State Index: 34.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 19.8 ft | Not graded |
| Phosphorus | No recent samples | |
| Chlorophyll-a (Algae) | No recent samples | |
| Trophic State Index (TSI) | 34 | Oligotrophic |
Low nutrients, clear water, excellent for swimming
Where to stay near Kolelemook Lake
Compare lakeside cabins, hotels, and vacation rentals near Kolelemook Lake 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.
Top-rated places to stay near Kolelemook Lake
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Recreation & Access
- Kolelemook LakePublic
Named access points from the USGS National Boat Ramps inventory, snapped within 5 km. More lakes with boat ramps
Fishing Kolelemook Lake
EPA Impairment Status
Kolelemook Lake 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 NHLAK801060401-08-01 · Official waterbody report
Graded lakes near Kolelemook Lake
Kolelemook Lake has no grade, but these lakes within a short drive do.
Nearby Lakes in Sullivan County
Frequently asked questions about Kolelemook Lake
Where is Kolelemook Lake?
- Kolelemook Lake is a lake in Sullivan 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 Kolelemook Lake?
- Kolelemook Lake in Sullivan County, New Hampshire is not rated for water quality — its monitoring record does not meet the evidence bar. Water clarity: 19.8 ft visibility.
Is Kolelemook Lake safe to swim in?
- Not rated for swimming — there is not enough monitoring data to judge this lake. Kolelemook Lake 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 Kolelemook Lake?
- Kolelemook Lake has 1 documented boat landing in the USGS National Boat Ramps inventory. Named access points include Kolelemook Lake. Public access is listed as yes.
Explore Kolelemook Lake 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
3 measurements from 1 monitoring station, 2020–2022. Retrieved from the EPA Water Quality Portal on 2026-08-21.
Collected and reported by
- North American Lake Management Society
NALMS3 samples · 2020–2022
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