Kolelemook Lake
Sullivan County, New HampshireView mapDirections
NHDES publishes the water-quality measurements for Kolelemook Lake. Here is what has been measured.
- Impaired · Mercury
- Public access
- Limited data
Kolelemook Lake in Sullivan County, New Hampshire has water-quality measurements published by NHDES, shown here as reported. Water clarity: 19.8 ft visibility.
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. Methodology: how these readings are compared.
What Kolelemook Lake is good for
From access and monitoring records, not editorial picks.
- Clear water19.8 ft of visibility
- Boat launch1 documented ramp
Swimming conditions
No readingLimited data
Nutrient and algae readings are not a swimming clearance. Kolelemook Lake is listed impaired under Clean Water Act §303(d) (IR 4A) for mercury, pH / acidity. Check local advisories before you swim.
Whether Kolelemook Lake is safe to swim in today is a call for the New Hampshire Department of Environmental Services and the county health department, who post current advisories. LakeQuality does not issue swimming clearances.
Water quality measurements for Kolelemook Lake
These are the measurements NHDES publishes for Kolelemook Lake, shown as reported. The condition class beside each reading is the EPA National Lakes Assessment class for this lake’s ecoregion.
Crystal clear, you can see 19.8 ft down. TSI 34.
| Measure | Reading | Where it sits |
|---|---|---|
| Water clarity (Secchi depth) | 19.8ft | Measured, not scored How deep a black-and-white disk stays visible from the surface. Higher is clearer. |
| Total phosphorus | No reading The nutrient that most limits algae growth in freshwater. More phosphorus, more algae potential. | |
| Chlorophyll-a (algae) | No reading The green pigment in algae — a direct measure of how much algae is in the water. | |
| Trophic state (TSI)Carlson's 0–100 index of how much algae a lake can support, from clarity, phosphorus and chlorophyll-a. | 34 | Oligotrophic OligotrophicMesotrophicEutrophicHypereutrophic |
Low nutrients, clear water. No reading is a swimming clearance.
Ask about Kolelemook Lake
Answers come straight from the public measurements and survey records on this page.
Recreation & Access
- Kolelemook LakePublic
Named access points in the USGS National Boat Ramps inventory, within about 3 miles. More lakes with boat ramps
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Stays near Kolelemook Lake
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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
Designated uses not supporting: Aquatic life, Fish consumption.
A Total Maximum Daily Load (TMDL) plan has been approved.
Source: EPA ATTAINS assessment unit NHLAK801060401-08-01 · Official waterbody report
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. Its water-quality measurements are published by NHDES and shown on this page as reported.
What is the water quality of Kolelemook Lake?
- Kolelemook Lake in Sullivan County, New Hampshire has water-quality measurements published by NHDES, shown here as reported. Water clarity: 19.8 ft visibility.
Is Kolelemook Lake safe to swim in?
- Nutrient and algae readings are not a swimming clearance. Kolelemook Lake is listed impaired under Clean Water Act §303(d) (IR 4A) for mercury, pH / acidity. Check local advisories before you swim.
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.
Can I fish at Kolelemook Lake?
- Kolelemook Lake has 1 documented boat landing in the USGS National Boat Ramps inventory. Seasons, size and bag limits, and whether you need a license are set by New Hampshire's fish and wildlife agency, so check its current regulations before you go.
Explore Kolelemook Lake across LakeQuality
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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)
EPA condition classes from the National Lakes Assessment (EPA 841-R-24-006, Table 6-3), applied by ecoregion. See where the data comes from 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