Lake Peekskill
Putnam County, New York52 acresView mapDirections
NY DEC publishes the water-quality measurements for Lake Peekskill. Here is what has been measured.
- Impaired · Nutrients (phosphorus, nitrogen)
- 41 ft max depth
- Limited data
Lake Peekskill in Putnam County, New York has water-quality measurements published by NY DEC, shown here as reported. Water clarity: 3.9 ft visibility. Surface area: 52 acres.
Lake Peekskill is a 52-acre lake in Putnam County, New York with an estimated average depth of about 41 feet.
Source: EPA Water Quality Portal sampling records, NYSDEC, last sampled 2020-09-27. Methodology: how these readings are compared.
Lake Peekskill covers about 52 acres in Putnam County. If you are planning to stay, you can search lake houses and cabins around Lake Peekskill on Vrbo, or look for a hotel room near the lake on Booking.com or Expedia.
Swimming conditions
No readingRecreation use not supported
Nutrient and algae readings are not a swimming clearance. Lake Peekskill is listed impaired under Clean Water Act §303(d) (IR 5) for nutrients (phosphorus, nitrogen). Check local advisories before you swim.
Whether Lake Peekskill is safe to swim in today is a call for the New York Department of Environmental Conservation and the county health department, who post current advisories. LakeQuality does not issue swimming clearances.
Water quality measurements for Lake Peekskill
These are the measurements NY DEC publishes for Lake Peekskill, shown as reported. The condition class beside each reading is the EPA National Lakes Assessment class for this lake’s ecoregion.
Murky, only visible to about 3.9 ft. TSI 57.
| Measure | Reading | Where it sits |
|---|---|---|
| Water clarity (Secchi depth) | 3.9ft | Measured, not scored How deep a black-and-white disk stays visible from the surface. Higher is clearer. |
| Total phosphorus | No reading The nutrient that most limits algae growth in freshwater. More phosphorus, more algae potential. | |
| Chlorophyll-a (algae) | No reading The green pigment in algae — a direct measure of how much algae is in the water. | |
| Trophic state (TSI)Carlson's 0–100 index of how much algae a lake can support, from clarity, phosphorus and chlorophyll-a. | 57 | Eutrophic OligotrophicMesotrophicEutrophicHypereutrophic |
High nutrients, frequent algae, reduced clarity
Ask about Lake Peekskill
Answers come straight from the public measurements and survey records on this page.
Lake Details
Max depth
~41 ft est.
Surface area
52 acres
Depth marked “est.” is a modeled maximum from GLOBathy (Khazaei et al. 2022, CC0), not a measured survey. New York has not published bathymetry for Lake Peekskill.
Lake Size & Watershed
Watershed (drainage) area
0 sq mi
HydroLAKES / HydroSHEDS
Shoreline
1.4 mi
HydroLAKES / HydroSHEDS
Elevation
302 ft
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.
Stays via Stay22
Stays near Lake Peekskill
Compare lakeside cabins, hotels, and vacation rentals near Lake Peekskill in Putnam 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 Lake Peekskill
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Fishing Lake Peekskill
Reservoir Info (USACE NID)
Lake Peekskill is a man-made reservoir impounded by the Lake Peekskill Dam (completed 1928), built primarily for recreation on the HOLLOWBROOK; concrete-type dam, 16 ft tall and 120 ft long.
- Surface area
- 52 ac
- Normal storage
- 1,074 ac-ft
- Max storage
- 1,357 ac-ft
- Drainage area
- 0.6 sq mi
- Hazard class
- High
- Owner
- LAKE PEEKSKILL IMPROVEMENT DISTRICT
Source: USACE National Inventory of Dams, NID ID NY00087 · Operator website
EPA Impairment Status
Lake Peekskill is officially listed as impaired under Clean Water Act §303(d) in the 2022 EPA reporting cycle (IR category 5).
Causes of impairment
Designated uses not supporting: Recreation.
Source: EPA ATTAINS assessment unit NY1301-0147 · Official waterbody report
Regulated Pollution Sources Nearby
1 EPA-permitted facility operate within about 5 miles of Lake Peekskill under Clean Water Act (NPDES) discharge permits. 1 facility has a reported Clean Water Act violation in the past three years.
- Peekskill (C) WtpPeekskill · 2.8 mi away · NPDES NY0274585Recent 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.
Nearby Lakes in Putnam County
Frequently asked questions about Lake Peekskill
Where is Lake Peekskill?
- Lake Peekskill is a lake in Putnam County, New York. Its water-quality measurements are published by NY DEC and shown on this page as reported.
What is the water quality of Lake Peekskill?
- Lake Peekskill in Putnam County, New York has water-quality measurements published by NY DEC, shown here as reported. Water clarity: 3.9 ft visibility. Surface area: 52 acres.
Is Lake Peekskill safe to swim in?
- Nutrient and algae readings are not a swimming clearance. Lake Peekskill is listed impaired under Clean Water Act §303(d) (IR 5) for nutrients (phosphorus, nitrogen). Check local advisories before you swim.
How deep is Lake Peekskill?
- No published bathymetric survey covers Lake Peekskill, so its depth has not been measured. The HydroLAKES global model estimates an average depth of about 41 feet, but that is a modelled estimate derived from surrounding terrain rather than a measurement on the water, so treat it as approximate. The lake covers 52 acres.
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Where this data comes from
8 measurements from 1 monitoring station, 2020. Retrieved from the EPA Water Quality Portal on 2026-08-02.
Collected and reported by
- North American Lake Management Society
NALMS8 samples · 2020
Monitoring station identifiers (1)
EPA condition classes from the National Lakes Assessment (EPA 841-R-24-006, Table 6-3), applied by ecoregion. See where the data comes from and data sources.
Other records on this page
Impairment status from EPA ATTAINS 303(d) database
Regulated discharger data from EPA ECHO (ICIS-NPDES)
Lake size & watershed from HydroLAKES (HydroSHEDS)