Lake Pinneo
Windsor County, Vermont50 acresView mapDirections
Vermont DEC publishes the water-quality measurements for Lake Pinneo. Here is what has been measured.
- Impaired · Nuisance exotic species
- 17 ft max depth
- Limited data
Lake Pinneo in Windsor County, Vermont has water-quality measurements published by Vermont DEC, shown here as reported. Water clarity: 7.5 ft visibility. Surface area: 50 acres.
Lake Pinneo is a 50-acre lake in Windsor County, Vermont with an estimated average depth of about 17 feet.
Source: EPA Water Quality Portal sampling records, VT DEC, last sampled 2022-04-20. Methodology: how these readings are compared.
Lake Pinneo covers about 50 acres in Windsor County. If you are planning to stay, you can search lake houses and cabins around Lake Pinneo on Vrbo, or look for a hotel room near the lake on Booking.com or Expedia.
Swimming conditions
No readingRecreation use not supported
Nutrient and algae readings are not a swimming clearance. Lake Pinneo is listed impaired under Clean Water Act §303(d) (IR 4C) for nuisance exotic species. Check local advisories before you swim.
Whether Lake Pinneo 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 Lake Pinneo
These are the measurements Vermont DEC publishes for Lake Pinneo, shown as reported. The condition class beside each reading is the EPA National Lakes Assessment class for this lake’s ecoregion.
Moderate clarity, visible to about 7.5 ft. TSI 48.
| Measure | Reading | Where it sits |
|---|---|---|
| Water clarity (Secchi depth) | 7.5ft | Measured, not scored How deep a black-and-white disk stays visible from the surface. Higher is clearer. |
| Total phosphorus | No reading The nutrient that most limits algae growth in freshwater. More phosphorus, more algae potential. | |
| Chlorophyll-a (algae) | No reading The green pigment in algae — a direct measure of how much algae is in the water. | |
| Trophic state (TSI)Carlson's 0–100 index of how much algae a lake can support, from clarity, phosphorus and chlorophyll-a. | 48 | Mesotrophic OligotrophicMesotrophicEutrophicHypereutrophic |
Moderate nutrients, good water quality
Ask about Lake Pinneo
Answers come straight from the public measurements and survey records on this page.
Lake Details
Max depth
~17 ft est.
Surface area
50 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 Lake Pinneo.
Lake Size & Watershed
Watershed (drainage) area
203 sq mi
HydroLAKES / HydroSHEDS
Shoreline
1.4 mi
HydroLAKES / HydroSHEDS
Elevation
571 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 Lake Pinneo
Compare lakeside cabins, hotels, and vacation rentals near Lake Pinneo in Windsor 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 Lake Pinneo
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Fishing Lake Pinneo
Reservoir Info (USACE NID)
Lake Pinneo is a man-made reservoir impounded by the Lake Pinneo (completed 1975), built primarily for recreation on the Ottauquechee River-Tr; earth-type dam, 10 ft tall and 6,500 ft long.
- Surface area
- 50 ac
- Normal storage
- 0 ac-ft
- Max storage
- 430 ac-ft
- Drainage area
- 0.08 sq mi
- Hazard class
- Low
- Owner
- QUECHEE LAKES LANDOWNERS
Source: USACE National Inventory of Dams, NID ID VT00258 · Operator website
EPA Impairment Status
Lake Pinneo is officially listed as impaired under Clean Water Act §303(d) in the 2022 EPA reporting cycle (IR category 4C).
Causes of impairment
Designated uses not supporting: Aquatic life, Recreation, Other.
Source: EPA ATTAINS assessment unit VT10-02L03 · Official waterbody report
Nearby Lakes in Windsor County
Frequently asked questions about Lake Pinneo
Where is Lake Pinneo?
- Lake Pinneo is a lake in Windsor County, Vermont. Its water-quality measurements are published by Vermont DEC and shown on this page as reported.
What is the water quality of Lake Pinneo?
- Lake Pinneo in Windsor County, Vermont has water-quality measurements published by Vermont DEC, shown here as reported. Water clarity: 7.5 ft visibility. Surface area: 50 acres.
Is Lake Pinneo safe to swim in?
- Nutrient and algae readings are not a swimming clearance. Lake Pinneo is listed impaired under Clean Water Act §303(d) (IR 4C) for nuisance exotic species. Check local advisories before you swim.
How deep is Lake Pinneo?
- No published bathymetric survey covers Lake Pinneo, so its depth has not been measured. The HydroLAKES global model estimates an average depth of about 17 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 50 acres.
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Where this data comes from
6 measurements from 2 monitoring stations, 2020–2022. Retrieved from the EPA Water Quality Portal on 2026-08-02.
Collected and reported by
- Vermont Dept of Environmental Conservation
1VTDECWQ6 samples · 2020–2022
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 (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
Impairment status from EPA ATTAINS 303(d) database
Lake size & watershed from HydroLAKES (HydroSHEDS)