Somerset Lake is a cold, clear oligotrophic lake in Delaware County, New York. Water quality is graded A based on 1 sampling years through 2020.
Source: EPA Water Quality Portal sampling records, New York DNR, last sampled 2020-09-07. 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 15.1 ft down. Trophic State Index: 38.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 15.1 ft | A |
| Phosphorus | No data | |
| Chlorophyll-a (Algae) | No data | |
| Trophic State Index (TSI) | 38 | Oligotrophic |
Low nutrients, clear water, excellent for swimming
Where to stay near Somerset Lake
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Fishing Somerset Lake
Location
County Ranking
Ranked #1 of 1 lakes in Delaware County
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Low nutrients, clear water, excellent for swimming
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Lake Size & Watershed
Size, shoreline, and watershed area from HydroLAKES (HydroSHEDS). Mean depth is a modeled estimate.
Regulated Pollution Sources Nearby
8 EPA-permitted facilities operate within about 5 miles of Somerset Lake under Clean Water Act (NPDES) discharge permits, including 1 classified by the EPA as major discharger. 4 facilities have a reported Clean Water Act violation in the past three years.
- Bangor Boro Auth WwtpBangor · 4.1 mi away · NPDES PA0028568MajorRecent violation
- Hancock (V) WwtpHancock · 3 mi away · NPDES NY0089702Recent violation
- Leos 848 Prod Woodmansee QuarryEquinunk · 3.7 mi away · NPDES PA0226190Recent violation
- Crea SolarLake Como · 4.4 mi away · NPDES PAD640052Recent violation
- Bard-Parker Div BectonHancock · 3.3 mi away · NPDES NY0122751
- Johnston & Rhodes Peterson QuarryEquinunk · 3.8 mi away · NPDES PA0225061
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: 2020-09-07
Monitoring stations: 1