Rondout Reservoir
Ulster County, New York2,120 acresView mapDirections
No nutrient or algae sampling on record from NY DEC for this lake.
- Impaired · Mercury
- 120 ft max depth
Rondout Reservoir in Ulster County, New York has water-quality measurements published by NY DEC, shown here as reported. Maximum depth: 120.1 ft. Surface area: 2120 acres.
Rondout Reservoir is a 2,120-acre lake in Ulster County, New York with a maximum depth of 120 feet.
Source: EPA Water Quality Portal sampling records, NYSDEC. Methodology: how these readings are compared.
What Rondout Reservoir is good for
From access and monitoring records, not editorial picks.
- Deep water120.1 ft surveyed max depth
- Big water2,120 acres
Swimming conditions
No readingNot rated
Nutrient and algae readings are not a swimming clearance. Rondout Reservoir is listed impaired under Clean Water Act §303(d) (IR 4A) for mercury. Check local advisories before you swim.
Whether Rondout Reservoir 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 Rondout Reservoir
These are the measurements NY DEC publishes for Rondout Reservoir, 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 Rondout Reservoir
Answers come straight from the public measurements and survey records on this page.
Lake Details
Max depth
120.1 ft
Surface area
2,120 acres
Shoreline
20.6 mi
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Fishing Rondout Reservoir
EPA Impairment Status
Rondout Reservoir is officially listed as impaired under Clean Water Act §303(d) in the 2022 EPA reporting cycle (IR category 4A).
Causes of impairment
Designated uses not supporting: Aquatic life.
A Total Maximum Daily Load (TMDL) plan has been approved.
Source: EPA ATTAINS assessment unit NY1306-0003 · Official waterbody report
Nearby Lakes in Ulster County
Frequently asked questions about Rondout Reservoir
Where is Rondout Reservoir?
- Rondout Reservoir is a lake in Ulster 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 Rondout Reservoir?
- Rondout Reservoir in Ulster County, New York has water-quality measurements published by NY DEC, shown here as reported. Maximum depth: 120.1 ft. Surface area: 2120 acres.
Is Rondout Reservoir safe to swim in?
- Nutrient and algae readings are not a swimming clearance. Rondout Reservoir is listed impaired under Clean Water Act §303(d) (IR 4A) for mercury. Check local advisories before you swim.
How deep is Rondout Reservoir?
- Rondout Reservoir has a maximum depth of 120.1 feet. The lake covers 2120 acres.
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Where this data comes from
Measurements for Rondout Reservoir 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