Lewis Pond
Essex County, VermontView mapDirections
Clarity, phosphorus, and algae sit in the clean band for this region.
↓ down from A at the last regrade
- Oligotrophic
- #7 of 9 in the county
- 29 ft max depth
- Limited data
Lewis Pond in Essex County, Vermont has a water quality grade of B (Good). Phosphorus: 12.5 µg/L. Chlorophyll-a (algae): 1.7 µg/L.
- Max depth
- ~29 ft est.
- Type
- Oligotrophic
- Phosphorus
- 12.5 µg/L
- Chlorophyll-a
- 1.7 µg/L
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Watch Lewis Pond’s letter
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Lewis Pond is a cold, clear oligotrophic lake in Essex County, Vermont with an estimated average depth of about 29 feet. Water quality is graded B based on 1 sampling years through 2022. Compared to the 8 other monitored lakes in Essex County, Lewis Pond ranks #7 for water quality.
Source: EPA Water Quality Portal sampling records, VT DEC, last sampled 2022-08-09. Grade methodology: LakeQuality methodology.
Swimming Safety
Grade onlyLimited data
Based on clarity and algae grades from past sampling — we do not hold live water temperature and a current cyanobacteria reading for this lake. Check your state or county health department before you swim.
The B is nutrients and algae, not a swimming clearance. Check local advisories before you swim.
Water Quality Grade: B (Good)
No clarity data. Phosphorus 12.5 µg/L. Chlorophyll-a 1.7 µg/L. TSI 38. The letter is not a swimming clearance.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | No recent samples | |
| Phosphorus | 12.5 µg/L | Good |
| Chlorophyll-a (Algae) | 1.7 µg/L | Not graded |
| Trophic State Index (TSI) | 38 | Oligotrophic |
Low nutrients, clear water. The letter is not a swimming clearance.
Lake Details
| Characteristic | Value |
|---|---|
| Maximum Depth | ~29 ft est. |
| Average Depth | ~12 ft est. |
Depth marked “est.” is a modeled maximum from GLOBathy (Khazaei et al. 2022, CC0), not a measured survey. Vermont has not published bathymetry for Lewis Pond.
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 Lewis Pond
County Ranking
Ranked #7 of 9 lakes in Essex County
Nearby Lakes With Higher Grades
Lewis Pond holds Grade B. 3 nearby lakes hold higher nutrient-and-algae grades — useful for a swim day, not a reason to skip lodging here.
Nearby Lakes in Essex County
Frequently asked questions about Lewis Pond
Where is Lewis Pond?
- Lewis Pond is a lake in Essex County, Vermont. LakeQuality grades it B for nutrients and algae. The letter is not a swimming clearance.
What is the water quality grade for Lewis Pond?
- Lewis Pond in Essex County, Vermont has a water quality grade of B (Good). Phosphorus: 12.5 µg/L. Chlorophyll-a (algae): 1.7 µg/L.
Is Lewis Pond safe to swim in?
- The B is nutrients and algae, not a swimming clearance. Check local advisories before you swim.
How deep is Lewis Pond?
- No published bathymetric survey covers Lewis Pond, so its depth has not been measured. The HydroLAKES global model estimates an average depth of about 29 feet, but that is a modelled estimate derived from surrounding terrain rather than a measurement on the water, so treat it as approximate.
Explore Lewis Pond across LakeQuality
Species activity outlook by water temperature and season
Where to stay at Vermont's top lakes, each with its grade
Low nutrients, clear water. The letter is not a swimming clearance.
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Other Grade B Lakes in Vermont
Oligotrophic Lakes in Vermont
Where this data comes from
8 measurements from 3 monitoring stations, 2022. Retrieved from the EPA Water Quality Portal on 2026-08-02.
Collected and reported by
- Vermont Dept of Environmental Conservation
1VTDECWQ8 samples · 2022
Analytical methods
- EPA approved Alternate Test Procedure for 4500 P H. Has a 28 day hold without acid preservation.
- 445.0 ~ EPA; Chlorophyll and Pheophytin in Algae by Fluorescence
- 2130 B ~ Nephelometric Method
Monitoring station identifiers (3)
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
Lake size & watershed from HydroLAKES (HydroSHEDS)