Deruyter Reservoir
Madison County, New York560 acresView mapDirections
NY DEC publishes the water-quality measurements for Deruyter Reservoir. Here is what has been measured.
- 54 ft max depth
- Limited data
Deruyter Reservoir in Madison County, New York has water-quality measurements published by NY DEC, shown here as reported. Water clarity: 17.6 ft visibility. Surface area: 560 acres.
Deruyter Reservoir is a 560-acre lake in Madison County, New York with an estimated average depth of about 54 feet.
Source: EPA Water Quality Portal sampling records, NYSDEC, last sampled 2020-09-30. Methodology: how these readings are compared.
Deruyter Reservoir covers about 560 acres in Madison County. Vrbo is where to look for cabins and lake homes around Deruyter Reservoir, and Booking.com and Expedia search hotels near the lake for your dates.
What Deruyter Reservoir is good for
From access and monitoring records, not editorial picks.
- Clear water17.6 ft of visibility
Swimming conditions
No readingLimited data
Nutrient and algae readings are not a swimming clearance. Check local advisories before you swim.
Whether Deruyter 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 Deruyter Reservoir
These are the measurements NY DEC publishes for Deruyter 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 17.6 ft down. TSI 36.
| Measure | Reading | Where it sits |
|---|---|---|
| Water clarity (Secchi depth) | 17.6ft | 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. | 36 | Oligotrophic OligotrophicMesotrophicEutrophicHypereutrophic |
Low nutrients, clear water. No reading is a swimming clearance.
Ask about Deruyter Reservoir
Answers come straight from the public measurements and survey records on this page.
Lake Details
Max depth
~54 ft est.
Surface area
560 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 Deruyter Reservoir.
Lake Size & Watershed
Watershed (drainage) area
5 sq mi
HydroLAKES / HydroSHEDS
Shoreline
5.3 mi
HydroLAKES / HydroSHEDS
Elevation
1,276 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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Stays near Deruyter Reservoir
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Top-rated places to stay near Deruyter Reservoir
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Fishing Deruyter Reservoir
Reservoir Info (USACE NID)
Deruyter Reservoir is a man-made reservoir impounded by the Deruyter Dam (completed 1863), built primarily for navigation on the LIMESTONE CREEK; earth-type dam, 68 ft tall and 1,600 ft long.
- Surface area
- 560 ac
- Normal storage
- 11,890 ac-ft
- Max storage
- 16,200 ac-ft
- Drainage area
- 5.62 sq mi
- Hazard class
- High
- Owner
- New York State Canal Corporation
All listed purposes: Navigation;Recreation.
Source: USACE National Inventory of Dams, NID ID NY00774 · Operator website
Regulated Pollution Sources Nearby
1 EPA-permitted facility operate within about 5 miles of Deruyter Reservoir under Clean Water Act (NPDES) discharge permits.
- Deruyter Lake Boat & CottageDeruyter · 1.3 mi away · NPDES NY0244716
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 Madison County
Frequently asked questions about Deruyter Reservoir
Where is Deruyter Reservoir?
- Deruyter 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 Deruyter Reservoir?
- Deruyter Reservoir in Madison County, New York has water-quality measurements published by NY DEC, shown here as reported. Water clarity: 17.6 ft visibility. Surface area: 560 acres.
Is Deruyter Reservoir safe to swim in?
- Nutrient and algae readings are not a swimming clearance. Check local advisories before you swim.
How deep is Deruyter Reservoir?
- No published bathymetric survey covers Deruyter Reservoir, so its depth has not been measured. The HydroLAKES global model estimates an average depth of about 54 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 560 acres.
Explore Deruyter Reservoir across LakeQuality
Depth, room, public access, and the state wake-sport rules
9.5 mi away · 137 ft
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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
Regulated discharger data from EPA ECHO (ICIS-NPDES)
Lake size & watershed from HydroLAKES (HydroSHEDS)