Deruyter Reservoir is a 560-acre cold, clear oligotrophic lake in Madison County, New York. Water quality is graded A based on 1 sampling years through 2020. The lake supports 1 documented fish species including Walleye. Compared to the 7 other monitored lakes in Madison County, Deruyter Reservoir ranks #2 for water quality.
Source: EPA Water Quality Portal sampling records, New York DNR, last sampled 2020-09-30. Grade methodology: LakeGrade methodology.
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Swimming Safety
Excellent for swimming, crystal clear water with minimal algae
Water Quality Grade: A, Excellent
Crystal clear, you can see 17.6 ft down. Trophic State Index: 36.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 17.6 ft | A |
| Phosphorus | No data | |
| Chlorophyll-a (Algae) | No data | |
| Trophic State Index (TSI) | 36 | Oligotrophic |
Low nutrients, clear water, excellent for swimming
Lake Details
| Characteristic | Value |
|---|---|
| Surface Area | 560 acres |
Where to stay near Deruyter Reservoir
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Fish Species
Click a species to see every graded lake where it is documented.
Fishing Deruyter Reservoir
Location
County Ranking
Ranked #2 of 8 lakes in Madison County
Nearby Lakes in Madison County
Explore Deruyter Reservoir across LakeGrade
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Species activity outlook by water temperature and season
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Low nutrients, clear water, excellent for swimming
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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
Lake Size & Watershed
Size, shoreline, and watershed area from HydroLAKES (HydroSHEDS). Mean depth is a modeled estimate.
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.
Data Sources
Water quality data from the EPA Water Quality Portal
Regulated discharger data from EPA ECHO (ICIS-NPDES)
Lake size & watershed from HydroLAKES (HydroSHEDS)
Grading methodology based on Metropolitan Council standards
Most recent sample: 2020-09-30
Monitoring stations: 1