Blue Mtn Lake is a cold, clear oligotrophic lake in Hamilton County, New York. Water quality is graded A based on 1 sampling years through 2021. The lake supports 4 documented fish species including Brook Trout, Lake Trout, and Landlocked Salmon. Compared to the 6 other monitored lakes in Hamilton County, Blue Mtn Lake ranks #1 for water quality.
Source: EPA Water Quality Portal sampling records, New York DNR, last sampled 2021-08-17. Grade methodology: LakeGrade methodology.
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Swimming Safety
Excellent for swimming, crystal clear water with minimal algae
Water Quality Grade: A, Excellent
Crystal clear, you can see 21 ft down. Trophic State Index: 33.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 21 ft | A |
| Phosphorus | No data | |
| Chlorophyll-a (Algae) | No data | |
| Trophic State Index (TSI) | 33 | Oligotrophic |
Low nutrients, clear water, excellent for swimming
Where to stay near Blue Mtn Lake
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Fish Species
Click a species to see every graded lake where it is documented.
Fishing Blue Mtn Lake
Location
County Ranking
Ranked #1 of 7 lakes in Hamilton County
Nearby Lakes in Hamilton County
Explore Blue Mtn Lake across LakeGrade
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Species activity outlook by water temperature and season
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Low nutrients, clear water, excellent for swimming
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More records, surveys & data sources
EPA Impairment Status
Blue Mtn Lake is officially listed as impaired under Clean Water Act §303(d) in the 2022 EPA reporting cycle (IR category 4A).
Causes of impairment
A Total Maximum Daily Load (TMDL) plan has been approved.
Source: EPA ATTAINS assessment unit NY0903-0204 · Official waterbody report · Matched by proximity (0.5 km)
Lake Size & Watershed
Size, shoreline, and watershed area from HydroLAKES (HydroSHEDS). Mean depth is a modeled estimate.
Regulated Pollution Sources Nearby
3 EPA-permitted facilities operate within about 5 miles of Blue Mtn Lake under Clean Water Act (NPDES) discharge permits.
- The Hedges On Blue Mountain LakeBlue Mountain Lake · 0.8 mi away · NPDES NY0255947
- Blue Mountain Lake Water Filtration PltBlue Mountain Lake · 1.1 mi away · NPDES NY0256161
- Adirondack MuseumBlue Mountain Lake · 1.5 mi away · NPDES NY0240273
Facilities permitted to discharge under the Clean Water Act within ~5 miles; proximity does not by itself mean a facility affects this lake. Source: EPA ECHO (ICIS-NPDES), as of 2026-07.
Data Sources
Water quality data from the EPA Water Quality Portal
Impairment status from EPA ATTAINS 303(d) database
Regulated discharger data from EPA ECHO (ICIS-NPDES)
Lake size & watershed from HydroLAKES (HydroSHEDS)
Grading methodology based on Metropolitan Council standards
Most recent sample: 2021-08-17
Monitoring stations: 1