Lake Lincolndale is a 22-acre productive, nutrient-rich eutrophic lake in Westchester County, New York. Water quality is graded F based on 1 sampling years through 2020. Compared to the 5 other monitored lakes in Westchester County, Lake Lincolndale ranks #5 for water quality.
Source: EPA Water Quality Portal sampling records, New York DNR, last sampled 2020-09-20. Grade methodology: LakeGrade methodology.
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Swimming Safety
Avoid swimming, very poor water quality, potential algae toxins
Water Quality Grade: F, Very Poor
Very murky, less than 2.8 ft of visibility. Trophic State Index: 62.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 2.8 ft | F |
| Phosphorus | No data | |
| Chlorophyll-a (Algae) | No data | |
| Trophic State Index (TSI) | 62 | Eutrophic |
High nutrients, frequent algae, reduced clarity
Lake Details
| Characteristic | Value |
|---|---|
| Surface Area | 22 acres |
Where to stay near Lake Lincolndale
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Fishing Lake Lincolndale
Location
County Ranking
Ranked #5 of 6 lakes in Westchester County
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High nutrients, frequent algae, reduced clarity
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Reservoir Info (USACE NID)
Lake Lincolndale is a man-made reservoir impounded by the Lake Lincolndale Dam (completed 1935), built primarily for recreation on the TR-PLUM BROOK; earth-type dam, 22 ft tall and 580 ft long.
- Surface area
- 22 ac
- Normal storage
- 170 ac-ft
- Max storage
- 275 ac-ft
- Drainage area
- 0.54 sq mi
- Hazard class
- High
- Owner
- LAKE LINCOLNDALE PROPERTY OWNERS ASSOCIATION
Source: USACE National Inventory of Dams, NID ID NY00102 · Operator website
EPA Impairment Status
Lake Lincolndale 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 NY1302-0089 · Official waterbody report
Regulated Pollution Sources Nearby
20 EPA-permitted facilities operate within about 5 miles of Lake Lincolndale under Clean Water Act (NPDES) discharge permits. 6 facilities have a reported Clean Water Act violation in the past three years.
- Country Manor StpMahopac · 1.1 mi away · NPDES NY0029017Recent violation
- Lincoln Hall StpLincolndale · 1.2 mi away · NPDES NY0036994Recent violation
- Heritage Hills StpSomers · 2 mi away · NPDES NY0026891Recent violation
- Somers High School & Primrose Elem CampusLincolndale · 2.2 mi away · NPDES NY0035483Recent violation
- The Paramount At Somers Rehabilitation & NursingSomers · 3.2 mi away · NPDES NY0101877Recent violation
- Seven Springs Sewer CorpPurdys · 3.7 mi away · NPDES NY0029653Recent violation
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)
Grading methodology based on Metropolitan Council standards
Most recent sample: 2020-09-20
Monitoring stations: 1