Reservoir Number One
Westchester County, New York57 acresView mapDirections
No nutrient or algae sampling on record from NY DEC for this lake.
- Impaired · Nutrients (phosphorus, nitrogen)
- 30 ft max depth
Reservoir Number One in Westchester County, New York has water-quality measurements published by NY DEC, shown here as reported. Maximum depth: 30 ft. Surface area: 57 acres.
Reservoir Number One is a 57-acre lake in Westchester County, New York with a maximum depth of 30 feet.
Source: EPA Water Quality Portal sampling records, NYSDEC. Methodology: how these readings are compared.
What Reservoir Number One is good for
From access and monitoring records, not editorial picks.
- Deep water30 ft surveyed max depth
Swimming conditions
No readingRecreation use not supported
Nutrient and algae readings are not a swimming clearance. Reservoir Number One is listed impaired under Clean Water Act §303(d) (IR 5) for nutrients (phosphorus, nitrogen). Check local advisories before you swim.
Whether Reservoir Number One 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 Reservoir Number One
These are the measurements NY DEC publishes for Reservoir Number One, shown as reported. The condition class beside each reading is the EPA National Lakes Assessment class for this lake’s ecoregion.
No clarity data. TSI undefined.
Ask about Reservoir Number One
Answers come straight from the public measurements and survey records on this page.
Lake Details
Max depth
30 ft
Surface area
57 acres
Shoreline
2.4 mi
Stays via Stay22
Stays near Reservoir Number One
Compare lakeside cabins, hotels, and vacation rentals near Reservoir Number One in Westchester 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 Reservoir Number One
Prices for Oct 16–18, 4 adults. Change dates on the map below.
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 whole trip? See where to stay at New York’s top lakes →
Follow Reservoir Number One’s readings
Email me when new measurements post for this lake. Updates stay free.
Or email
Fishing Reservoir Number One
EPA Impairment Status
Reservoir Number One 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 NY1702-0075 · Official waterbody report
Nearby Lakes in Westchester County
Frequently asked questions about Reservoir Number One
Where is Reservoir Number One?
- Reservoir Number One is a lake in Westchester 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 Reservoir Number One?
- Reservoir Number One in Westchester County, New York has water-quality measurements published by NY DEC, shown here as reported. Maximum depth: 30 ft. Surface area: 57 acres.
Is Reservoir Number One safe to swim in?
- Nutrient and algae readings are not a swimming clearance. Reservoir Number One is listed impaired under Clean Water Act §303(d) (IR 5) for nutrients (phosphorus, nitrogen). Check local advisories before you swim.
How deep is Reservoir Number One?
- Reservoir Number One has a maximum depth of 30 feet. The lake covers 57 acres.
Explore Reservoir Number One across LakeQuality
More lakes in New York
Other Lakes in New York
Where this data comes from
Measurements for Reservoir Number One come from the EPA Water Quality Portal. Per-sample source details are not recorded for this lake.
Other records on this page
Impairment status from EPA ATTAINS 303(d) database