Hamilton County, New York · Water Quality Report Card
Blue Mountain Lake
Blue Mountain Lake in Hamilton County, New York is not rated for water quality — its monitoring record does not meet the evidence bar. Water clarity: 21 ft visibility.
- Clarity
- 21 ft
- Mean depth
- ~38 ft est.
- Type
- Oligotrophic
Blue Mountain Lake is a cold, clear oligotrophic lake in Hamilton County, New York with an estimated average depth of about 38 feet.
Source: EPA Water Quality Portal sampling records, NYSDEC, last sampled 2021-08-17. Grade methodology: LakeGrade methodology.
Watch Blue Mountain Lake water quality
Subscribe for LakeQuality updates by email. No spam, unsubscribe anytime.
Swimming Safety
Not rated for swimming — there is not enough monitoring data to judge this lake
Water Quality Grade: Not rated
Crystal clear, you can see 21 ft down. Trophic State Index: 33.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 21 ft | |
| Phosphorus | No data | |
| Chlorophyll-a (Algae) | No data | |
| Trophic State Index (TSI) | 33 | Oligotrophic |
Low nutrients, clear water, excellent for swimming
Lake Details
| Characteristic | Value |
|---|---|
| Average Depth | ~38 ft est. |
Depth marked “est.” is a modeled estimate from HydroLAKES, not a measured survey. New York has not published bathymetry for Blue Mountain Lake.
Where to stay near Blue Mountain Lake
Compare lakeside cabins, hotels, and vacation rentals near Blue Mountain Lake in Hamilton County, New York — 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 Blue Mountain Lake
Availability and prices from Stay22 partners (Booking.com, Vrbo, Expedia). We may earn a commission from bookings, at no extra cost to you.
Planning a trip to Blue Mountain Lake?
Get lake water-quality report cards plus the best cabin & lodging deals near Blue Mountain Lake — straight to your inbox. No spam, unsubscribe anytime.
Planning a whole trip? See where to stay at New York’s top lakes →
Fishing Blue Mountain Lake
Location
Nearby Lakes in Hamilton County
Explore Blue Mountain Lake across LakeGrade
Species activity outlook by water temperature and season
Top lakes and where to stay in the Adirondacks area
Where to stay at New York's top lakes, each with its grade
Low nutrients, clear water, excellent for swimming
New York's cleanest and most-polluted lakes, ranked
More New York Lake Rankings
Other Lakes in New York
Oligotrophic Lakes in New York
More records, surveys & data sources
EPA Impairment Status
Blue Mountain 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
Lake Size & Watershed
Size, shoreline, and watershed area from HydroLAKES (HydroSHEDS). Mean depth here is modelled, not surveyed — HydroLAKES v1.0 estimates lake depth from surrounding terrain rather than from soundings. Treat it as an approximation, and prefer a state bathymetric survey where one exists.
Where this data comes from
4 measurements from 1 monitoring station, 2021. Retrieved from the EPA Water Quality Portal on 2026-08-02.
Collected and reported by
- USGS New York Water Science Center
USGS-NY4 samples · 2021
Monitoring station identifiers (1)
Grade thresholds come from the U.S. EPA National Lakes Assessment 2022 Technical Support Document (EPA 841-R-24-006, Table 6-3), applied by ecoregion. See how grades are calculated.
Data Sources
Water quality data from the EPA Water Quality Portal
Impairment status from EPA ATTAINS 303(d) database
Lake size & watershed from HydroLAKES (HydroSHEDS)
Grade thresholds from the EPA National Lakes Assessment (EPA 841-R-24-006, Table 6-3), applied by ecoregion
Most recent sample: 2021-08-17
Monitoring stations: 1