South Pond
Lamoille County, Vermont109 acresView mapDirections
Vermont DEC publishes the water-quality measurements for South Pond. Here is what has been measured.
- Mesotrophic
- 40 ft max depth
South Pond in Lamoille County, Vermont has water-quality measurements published by Vermont DEC, shown here as reported. Water clarity: 15.4 ft visibility. Phosphorus: 8.2 µg/L. Chlorophyll-a (algae): 2.3 µg/L. Surface area: 109 acres.
South Pond is a 109-acre mesotrophic lake in Lamoille County, Vermont with an estimated average depth of about 40 feet. Overall water quality is improving over recent sampling years. Compared to the 5 other monitored lakes in Lamoille County, South Pond ranks #1 for water quality.
Source: EPA Water Quality Portal sampling records, VT DEC, last sampled 2025-09-01. Methodology: how these readings are compared.
South Pond covers about 110 acres in Lamoille County. Vrbo is where to look for cabins and lake homes around South Pond, and Booking.com and Expedia search hotels near the lake for your dates.
What South Pond is good for
From access and monitoring records, not editorial picks.
- Clear water15.4 ft of visibility
Swimming conditions
Readings onlyLow algae
Based on clarity and algae readings from past sampling — there is no live water temperature and a current cyanobacteria reading for this lake. Check your state or county health department before you swim.
Nutrient and algae readings are not a swimming clearance. Check local advisories before you swim.
Whether South Pond is safe to swim in today is a call for the Vermont Department of Environmental Conservation and the county health department, who post current advisories. LakeQuality does not issue swimming clearances.
Water quality measurements for South Pond
These are the measurements Vermont DEC publishes for South Pond, shown as reported. The condition class beside each reading is the EPA National Lakes Assessment class for this lake’s ecoregion.
Crystal clear, you can see 15.4 ft down. Phosphorus 8.2 µg/L. Chlorophyll-a 2.3 µg/L. TSI 37.
| Measure | Reading | Where it sits |
|---|---|---|
| Water clarity (Secchi depth) | 15.4ft | Measured, not scored How deep a black-and-white disk stays visible from the surface. Higher is clearer. |
| Total phosphorus | 8.2µg/L | Good GoodFairPoor |
| Chlorophyll-a (algae) | 2.3µg/L | Good GoodFairPoor |
| Trophic state (TSI)Carlson's 0–100 index of how much algae a lake can support, from clarity, phosphorus and chlorophyll-a. | 37 | Mesotrophic OligotrophicMesotrophicEutrophicHypereutrophic |
Moderate nutrients, good water quality
Ask about South Pond
Answers come straight from the public measurements and survey records on this page.
Lake Details
Max depth
~40 ft est.
Surface area
109 acres
Depth marked “est.” is a modeled maximum from GLOBathy (Khazaei et al. 2022, CC0), not a measured survey. Vermont has not published bathymetry for South Pond.
Lake Size & Watershed
Watershed (drainage) area
2 sq mi
HydroLAKES / HydroSHEDS
Shoreline
2.4 mi
HydroLAKES / HydroSHEDS
Elevation
1,211 ft
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.
Stays via Stay22
Stays near South Pond
Compare lakeside cabins, hotels, and vacation rentals near South Pond in Lamoille County, Vermont — live availability and prices for your trip. Switch the map to Satellite to see the lake and how close each stay is to the water.
Top-rated places to stay near South Pond
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Fishing South Pond
Water Quality Trend: Improving
Based on 5 years of monitoring (2021–2025).
Water clarity
Worsening5 years
Phosphorus
Improving-0.78 µg/L/yr5 years
Chlorophyll-a
Improving-0.44 µg/L/yr5 years
Reservoir Info (USACE NID)
South Pond is a man-made reservoir impounded by the South Pond (completed 1922), built primarily for recreation on the Gihon River-Tr; earth-type dam, 38 ft tall and 115 ft long.
- Surface area
- 109 ac
- Normal storage
- 0 ac-ft
- Max storage
- 3,300 ac-ft
- Drainage area
- 2.16 sq mi
- Hazard class
- Significant
- Owner
- SOUTH POND LAND OWNERS ASSOC.
Source: USACE National Inventory of Dams, NID ID VT00197 · Operator website
Nearby Lakes in Lamoille County
Frequently asked questions about South Pond
Where is South Pond?
- South Pond is a lake in Lamoille County, Vermont. Its water-quality measurements are published by Vermont DEC and shown on this page as reported.
What is the water quality of South Pond?
- South Pond in Lamoille County, Vermont has water-quality measurements published by Vermont DEC, shown here as reported. Water clarity: 15.4 ft visibility. Phosphorus: 8.2 µg/L. Chlorophyll-a (algae): 2.3 µg/L. Surface area: 109 acres.
Is South Pond safe to swim in?
- Nutrient and algae readings are not a swimming clearance. Check local advisories before you swim.
How deep is South Pond?
- No published bathymetric survey covers South Pond, so its depth has not been measured. The HydroLAKES global model estimates an average depth of about 40 feet, but that is a modelled estimate derived from surrounding terrain rather than a measurement on the water, so treat it as approximate. The lake covers 109 acres.
Explore South Pond across LakeQuality
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Mesotrophic Lakes in Vermont
Where this data comes from
117 measurements from 2 monitoring stations, 2021–2025. Retrieved from the EPA Water Quality Portal on 2026-08-02.
Collected and reported by
- Vermont Dept of Environmental Conservation
1VTDECWQ117 samples · 2021–2025
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 (2)
EPA condition classes from the National Lakes Assessment (EPA 841-R-24-006, Table 6-3), applied by ecoregion. See where the data comes from and data sources.
Other records on this page
Lake size & watershed from HydroLAKES (HydroSHEDS)