Unknown Pond is a cold, clear oligotrophic lake in Essex County, Vermont. Water quality is graded A based on 2 sampling years through 2024. Compared to the 18 other monitored lakes in Essex County, Unknown Pond ranks #7 for water quality.
Source: EPA Water Quality Portal sampling records, Vermont DNR, last sampled 2024-05-22. 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: 10.5 µg/L. Chlorophyll-a: 1.5 µg/L. Trophic State Index: 36.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | No data | |
| Phosphorus | 10.5 µg/L | A |
| Chlorophyll-a (Algae) | 1.5 µg/L | A |
| Trophic State Index (TSI) | 36 | Oligotrophic |
Low nutrients, clear water, excellent for swimming
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Fishing Unknown Pond
Location
County Ranking
Ranked #7 of 19 lakes in Essex County
Nearby Lakes in Essex County
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More Vermont Lake Rankings
Other Grade A Lakes in Vermont
Oligotrophic Lakes in Vermont
More records, surveys & data sources
Data Sources
Water quality data from the EPA Water Quality Portal
Grading methodology based on Metropolitan Council standards
Most recent sample: 2024-05-22
Monitoring stations: 1