Grass Pond is a mesotrophic lake in Franklin County, New York. Water quality is graded A based on 1 sampling years through 2023. Overall water quality is improving over recent sampling years. The lake supports 1 documented fish species including Brook Trout. Public access is available with 1 public boat landing. Compared to the 8 other monitored lakes in Franklin County, Grass Pond ranks #5 for water quality.
Source: EPA Water Quality Portal sampling records, New York DNR, last sampled 2023-07-10. Grade methodology: LakeGrade methodology.
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Swimming Safety
Excellent for swimming, crystal clear water with minimal algae
Water Quality Grade: A, Excellent
No clarity data. Phosphorus level: 18 µg/L. Trophic State Index: 46.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | No data | |
| Phosphorus | 18 µg/L | A |
| Chlorophyll-a (Algae) | No data | |
| Trophic State Index (TSI) | 46 | Mesotrophic |
Moderate nutrients, good water quality
Where to stay near Grass Pond
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Fish Species
Click a species to see every graded lake where it is documented.
Fishing Grass Pond
Water Quality Trend: ↑ Improving
Based on 4 years of monitoring data (2020-2025).
| Metric | Trend | Change/Year | Years |
|---|---|---|---|
| Phosphorus | ↑ Improving | -1.1 µg/L/yr | 4 |
Recreation & Access
Location
County Ranking
Ranked #5 of 9 lakes in Franklin County
Nearby Lakes in Franklin County
Explore Grass Pond across LakeGrade
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Fish species and best lakes in Franklin County
Species activity outlook by water temperature and season
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Where to stay at New York's top lakes, each with its grade
Moderate nutrients, good water quality
New York's cleanest and most-polluted lakes, ranked
More New York Lake Rankings
Other Grade A Lakes in New York
Mesotrophic Lakes in New York
More records, surveys & data sources
EPA Impairment Status
Grass Pond is officially listed as impaired under Clean Water Act §303(d) in the 2022 EPA reporting cycle (IR category 4A).
Causes of impairment
A Total Maximum Daily Load (TMDL) plan has been approved.
Source: EPA ATTAINS assessment unit NY0902-0005 · Official waterbody report · Matched by proximity (0.76 km)
Lake Size & Watershed
Size, shoreline, and watershed area from HydroLAKES (HydroSHEDS). Mean depth is a modeled estimate.
Data Sources
Water quality data from the EPA Water Quality Portal
Impairment status from EPA ATTAINS 303(d) database
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: 2023-07-10
Monitoring stations: 1