Oscaleta Lake is a mesotrophic lake in Westchester County, New York. Water quality is graded C based on 1 sampling years through 2020. Compared to the 5 other monitored lakes in Westchester County, Oscaleta Lake ranks #1 for water quality.
Source: EPA Water Quality Portal sampling records, New York DNR, last sampled 2020-09-14. Grade methodology: LakeGrade methodology.
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Swimming Safety
Generally safe for swimming, moderate water quality
Water Quality Grade: C, Fair
Moderate clarity, visible to about 8.4 ft. Trophic State Index: 47.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 8.4 ft | C |
| Phosphorus | No data | |
| Chlorophyll-a (Algae) | No data | |
| Trophic State Index (TSI) | 47 | Mesotrophic |
Moderate nutrients, good water quality
Where to stay near Oscaleta Lake
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Fishing Oscaleta Lake
Location
County Ranking
Ranked #1 of 6 lakes in Westchester County
Nearby Lakes in Westchester County
Explore Oscaleta Lake across LakeGrade
Fish species and top-graded lakes across New York
Species activity outlook by water temperature and season
Where to stay at New York's top lakes, each with its grade
Moderate nutrients, good water quality
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Other Grade C Lakes in New York
Mesotrophic Lakes in New York
More records, surveys & data sources
EPA Impairment Status
Oscaleta Lake is officially listed as impaired under Clean Water Act §303(d) in the 2022 EPA reporting cycle (IR category 5).
Causes of impairment
Source: EPA ATTAINS assessment unit NY1302-0141 · Official waterbody report · Matched by proximity (0.13 km)
Lake Size & Watershed
Size, shoreline, and watershed area from HydroLAKES (HydroSHEDS). Mean depth is a modeled estimate.
Regulated Pollution Sources Nearby
1 EPA-permitted facility operate within about 5 miles of Oscaleta Lake under Clean Water Act (NPDES) discharge permits.
- Shaft 13 Delaware AqueductBedford · 2.1 mi away · NPDES NY0265004
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: 2020-09-14
Monitoring stations: 1