Pleasant Lake
Oswego County, New YorkView mapDirections
Not Rated: one monitoring station are on record, but they measured water clarity only. LakeQuality’s A–F method grades total phosphorus, total nitrogen, chlorophyll-a, and turbidity; clarity is shown, not scored.
- Impaired · Nutrients (phosphorus, nitrogen)
- 43 ft max depth
- Public access
- Limited data
Pleasant Lake in Oswego County, New York is not rated for water quality — its monitoring record does not meet the evidence bar. Water clarity: 4.4 ft visibility.
- Clarity
- 4.4 ft
- Max depth
- ~43 ft est.
- Public access
- Yes
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Watch Pleasant Lake’s letter
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Why Pleasant Lake has no grade
Pleasant Lake has monitoring on record from one station, but only water clarity was measured. LakeQuality’s A–F letter uses total phosphorus, total nitrogen, chlorophyll-a, and turbidity against EPA National Lakes Assessment condition classes. With none of those grading measurements on record, Pleasant Lake is Not Rated — not an F. Its 4.4-foot median from 8 readings collected 2020 is still shown as clarity, but clarity alone cannot earn a letter.
Not Rated is EPA Integrated Reporting Category 3 — insufficient information. Everything below that has been measured is still reported on this page.
Sampling is run by NYSDEC and volunteer programs, and published through the EPA Water Quality Portal. Read the full grading methodology.
Pleasant Lake is a lake in Oswego County, New York with an estimated average depth of about 43 feet. Limited fish-species data available. Public access is available.
Source: EPA Water Quality Portal sampling records, NYSDEC, last sampled 2020-09-28. Grade methodology: LakeQuality methodology.
Swimming Safety
Not ratedLimited data
The letter is not a swimming clearance. Pleasant Lake is listed impaired under Clean Water Act §303(d) (IR 5) for nutrients (phosphorus, nitrogen). Check local advisories before you swim.
Water quality measurements for Pleasant Lake
These readings exist but are not enough for an A–F grade — see why.
Murky, only visible to about 4.4 ft. TSI 56.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 4.4 ft | Not graded |
| Phosphorus | No recent samples | |
| Chlorophyll-a (Algae) | No recent samples | |
| Trophic State Index (TSI) | 56 | Eutrophic |
High nutrients, frequent algae, reduced clarity
Lake Details
| Characteristic | Value |
|---|---|
| Maximum Depth | ~43 ft est. |
| Average Depth | ~11 ft est. |
| Public Access | Yes |
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 Pleasant Lake.
Lake Size & Watershed
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.
Fishing Pleasant Lake
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
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.
Nearby Lakes in Oswego County
Frequently asked questions about Pleasant Lake
Where is Pleasant Lake?
- Pleasant Lake is a lake in Oswego County, New York. LakeQuality has not rated this lake (UNRATED) — the only measurement available is water clarity, which is not a water-quality indicator on its own — EPA's National Lakes Assessment does not grade clarity.
What is the water quality grade for Pleasant Lake?
- Pleasant Lake in Oswego County, New York is not rated for water quality — its monitoring record does not meet the evidence bar. Water clarity: 4.4 ft visibility.
Is Pleasant Lake safe to swim in?
- The letter is not a swimming clearance. Pleasant Lake is listed impaired under Clean Water Act §303(d) (IR 5) for nutrients (phosphorus, nitrogen). Check local advisories before you swim.
How deep is Pleasant Lake?
- No published bathymetric survey covers Pleasant Lake, so its depth has not been measured. The HydroLAKES global model estimates an average depth of about 43 feet, but that is a modelled estimate derived from surrounding terrain rather than a measurement on the water, so treat it as approximate.
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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)
Grade thresholds from the EPA National Lakes Assessment (EPA 841-R-24-006, Table 6-3), applied by ecoregion. See how grades are calculated and data sources.
Other records on this page
Impairment status from EPA ATTAINS 303(d) database
Regulated discharger data from EPA ECHO (ICIS-NPDES)
Lake size & watershed from HydroLAKES (HydroSHEDS)