Schroon Lake is a cold, clear oligotrophic lake in Essex County, New York. Water quality is graded B based on 1 sampling years through 2020. The lake supports 3 documented fish species including Brook Trout, Lake Trout, and Landlocked Salmon. Public access is available. Compared to the 8 other monitored lakes in Essex County, Schroon Lake ranks #7 for water quality.
Source: EPA Water Quality Portal sampling records, New York DNR, last sampled 2020-09-24. Grade methodology: LakeGrade methodology.
Watch Schroon Lake water quality
Subscribe for LakeQuality updates by email. No spam, unsubscribe anytime.
Swimming Safety
Good for swimming, clear water with low algae levels
Water Quality Grade: B, Good
Good clarity, visible to about 14.1 ft. Trophic State Index: 39.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 14.1 ft | B |
| Phosphorus | No data | |
| Chlorophyll-a (Algae) | No data | |
| Trophic State Index (TSI) | 39 | Oligotrophic |
Low nutrients, clear water, excellent for swimming
Where to stay near Schroon Lake
Compare lakeside cabins, hotels, and vacation rentals near Schroon Lake in Essex 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 Schroon 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 Schroon Lake?
Get lake water-quality report cards plus the best cabin & lodging deals near Schroon Lake — straight to your inbox. No spam, unsubscribe anytime.
Planning a whole trip? See where to stay at New York’s top lakes →
Fish Species
Click a species to see every graded lake where it is documented.
Fishing Schroon Lake
Location
County Ranking
Ranked #7 of 9 lakes in Essex County
Nearby Lakes in Essex County
Explore Schroon Lake across LakeGrade
Fish species and top-graded lakes across New York
Fish species and best lakes in Essex County
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 Grade B Lakes in New York
Oligotrophic Lakes in New York
More records, surveys & data sources
EPA Impairment Status
Schroon 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 NY1104-0002 · Official waterbody report
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 Schroon Lake under Clean Water Act (NPDES) discharge permits. 2 facilities have a reported Clean Water Act violation in the past three years.
- Word Of Life CampSchroon Lake · 3.5 mi away · NPDES NY0130273Recent violation
- Schroon Lake WwtpSchroon Lake · 4.2 mi away · NPDES NY0020231Recent violation
- Word Of Life Island WwtpSchroon Lake · 3.3 mi away · NPDES NY0129623
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: 2020-09-24
Monitoring stations: 1