Bradley Brook Reservoir
Madison County, New York141 acresView mapDirections
NY DEC publishes the water-quality measurements for Bradley Brook Reservoir. Here is what has been measured.
- 45 ft max depth
- Limited data
Bradley Brook Reservoir in Madison County, New York has water-quality measurements published by NY DEC, shown here as reported. Water clarity: 20.7 ft visibility. Surface area: 141 acres.
Bradley Brook Reservoir is a 141-acre lake in Madison County, New York with an estimated average depth of about 45 feet.
Source: EPA Water Quality Portal sampling records, NYSDEC, last sampled 2020-08-29. Methodology: how these readings are compared.
What Bradley Brook Reservoir is good for
From access and monitoring records, not editorial picks.
- Clear water20.7 ft of visibility
Swimming conditions
No readingLimited data
Nutrient and algae readings are not a swimming clearance. Check local advisories before you swim.
Whether Bradley Brook 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 Bradley Brook Reservoir
These are the measurements NY DEC publishes for Bradley Brook Reservoir, shown as reported. The condition class beside each reading is the EPA National Lakes Assessment class for this lake’s ecoregion.
Crystal clear, you can see 20.7 ft down. TSI 33.
| Measure | Reading | Where it sits |
|---|---|---|
| Water clarity (Secchi depth) | 20.7ft | 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. | 33 | Oligotrophic OligotrophicMesotrophicEutrophicHypereutrophic |
Low nutrients, clear water. No reading is a swimming clearance.
Ask about Bradley Brook Reservoir
Answers come straight from the public measurements and survey records on this page.
Lake Details
Max depth
~45 ft est.
Surface area
141 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 Bradley Brook Reservoir.
Lake Size & Watershed
Watershed (drainage) area
3 sq mi
HydroLAKES / HydroSHEDS
Shoreline
2.2 mi
HydroLAKES / HydroSHEDS
Elevation
1,424 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.
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Fishing Bradley Brook Reservoir
Reservoir Info (USACE NID)
Bradley Brook Reservoir is a man-made reservoir impounded by the Bradley Brook Reservoir Dam (completed 1878), built primarily for other on the BRADLEY BROOK; earth-type dam, 35 ft tall and 1,060 ft long.
- Surface area
- 141 ac
- Normal storage
- 2,340 ac-ft
- Max storage
- 2,800 ac-ft
- Drainage area
- 2.6 sq mi
- Hazard class
- Significant
- Owner
- New York State Canal Corporation
All listed purposes: Other;Recreation.
Source: USACE National Inventory of Dams, NID ID NY00360 · Operator website
Nearby Lakes in Madison County
Frequently asked questions about Bradley Brook Reservoir
Where is Bradley Brook Reservoir?
- Bradley Brook Reservoir is a lake in Madison 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 Bradley Brook Reservoir?
- Bradley Brook Reservoir in Madison County, New York has water-quality measurements published by NY DEC, shown here as reported. Water clarity: 20.7 ft visibility. Surface area: 141 acres.
Is Bradley Brook Reservoir safe to swim in?
- Nutrient and algae readings are not a swimming clearance. Check local advisories before you swim.
How deep is Bradley Brook Reservoir?
- No published bathymetric survey covers Bradley Brook Reservoir, so its depth has not been measured. The HydroLAKES global model estimates an average depth of about 45 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 141 acres.
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Where this data comes from
7 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
NALMS7 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
Lake size & watershed from HydroLAKES (HydroSHEDS)