Pleasant Lake is a productive, nutrient-rich eutrophic lake in Oswego County, New York. Water quality is graded D based on 1 sampling years through 2020. Limited fish-species data available. Public access is available with 2 public boat landings. Compared to the 3 other monitored lakes in Oswego County, Pleasant Lake ranks #4 for water quality.
Source: EPA Water Quality Portal sampling records, New York DNR, last sampled 2020-09-28. Grade methodology: LakeGrade methodology.
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Swimming Safety
Swimming not recommended, poor water quality with high algae risk
Water Quality Grade: D, Poor
Murky, only visible to about 4.4 ft. Trophic State Index: 56.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 4.4 ft | D |
| Phosphorus | No data | |
| Chlorophyll-a (Algae) | No data | |
| Trophic State Index (TSI) | 56 | Eutrophic |
High nutrients, frequent algae, reduced clarity
Where to stay near Pleasant Lake
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Fishing Pleasant Lake
Recreation & Access
Location
County Ranking
Ranked #4 of 4 lakes in Oswego County
Nearby Lakes in Oswego County
Explore Pleasant Lake across LakeGrade
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Species activity outlook by water temperature and season
Where to stay at New York's top lakes, each with its grade
High nutrients, frequent algae, reduced clarity
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Other Grade D Lakes in New York
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More records, surveys & data sources
EPA Impairment Status
Pleasant 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 NY0703-0047 · Official waterbody report
Lake Size & Watershed
Size, shoreline, and watershed area from HydroLAKES (HydroSHEDS). Mean depth is a modeled estimate.
Regulated Pollution Sources Nearby
10 EPA-permitted facilities operate within about 5 miles of Pleasant Lake under Clean Water Act (NPDES) discharge permits, including 3 classified by the EPA as major dischargers. 5 facilities have a reported Clean Water Act violation in the past three years.
- Oak Orchard WwtpClay · 2.7 mi away · NPDES NY0030317MajorRecent violation
- Brewerton WpcpBrewerton · 3.5 mi away · NPDES NY0027596MajorRecent violation
- Phoenix (V) StpPhoenix · 4.3 mi away · NPDES NY0020664MajorRecent violation
- Three Rivers PlazaPhoenix · 3.3 mi away · NPDES NY0070599Recent violation
- Fort Brewerton WwtpCentral Square · 4 mi away · NPDES NY0245062Recent violation
- Caughdenoy SdCentral Square · 2.5 mi away · NPDES NY0157376
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
Impairment status from EPA ATTAINS 303(d) database
Regulated discharger data from EPA ECHO (ICIS-NPDES)
Lake size & watershed from HydroLAKES (HydroSHEDS)
Grading methodology based on Metropolitan Council standards
Public boat-access points from the USGS National Boat Ramps inventory
Most recent sample: 2020-09-28
Monitoring stations: 1