Roaring Brook Lake is a 112-acre mesotrophic lake in Putnam County, New York. Water quality is graded C based on 1 sampling years through 2020. The lake supports 1 documented fish species including Brook Trout. Compared to the 12 other monitored lakes in Putnam County, Roaring Brook Lake ranks #4 for water quality.
Source: EPA Water Quality Portal sampling records, New York DNR, last sampled 2020-09-26. 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 8.3 ft. Trophic State Index: 47.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 8.3 ft | C |
| Phosphorus | No data | |
| Chlorophyll-a (Algae) | No data | |
| Trophic State Index (TSI) | 47 | Mesotrophic |
Moderate nutrients, good water quality
Lake Details
| Characteristic | Value |
|---|---|
| Surface Area | 112 acres |
Where to stay near Roaring Brook Lake
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Fish Species
Click a species to see every graded lake where it is documented.
Fishing Roaring Brook Lake
Location
County Ranking
Ranked #4 of 13 lakes in Putnam County
Nearby Lakes in Putnam County
Explore Roaring Brook 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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More records, surveys & data sources
Reservoir Info (USACE NID)
Roaring Brook Lake is a man-made reservoir impounded by the Roaring Brook Dam (completed 1959), built primarily for recreation on the ROARING BROOK; earth-type dam, 25 ft tall and 480 ft long.
- Surface area
- 112 ac
- Normal storage
- 616 ac-ft
- Max storage
- 895 ac-ft
- Drainage area
- 1.62 sq mi
- Hazard class
- High
- Owner
- Town of Putnam Valley
Source: USACE National Inventory of Dams, NID ID NY00239 · Operator website
EPA Impairment Status
Roaring Brook 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 NY1301-0153 · Official waterbody report · Matched by proximity (2.08 km)
Lake Size & Watershed
Size, shoreline, and watershed area from HydroLAKES (HydroSHEDS). Mean depth is a modeled estimate.
Data Sources
Water quality data from the EPA Water Quality Portal
Impairment status from EPA ATTAINS 303(d) database
Lake size & watershed from HydroLAKES (HydroSHEDS)
Grading methodology based on Metropolitan Council standards
Most recent sample: 2020-09-26
Monitoring stations: 1