Sweet Pond
Windham County, Vermont18 acresView mapDirections
Not enough samples to grade — no nutrient or algae measurement meets the evidence bar (at least 3 samples within 10 years). No letter yet. Here is what we do have.
- Limited data
Sweet Pond in Windham County, Vermont is not rated for water quality — its monitoring record does not meet the evidence bar. Surface area: 18 acres.
- Area
- 18 acres
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Watch Sweet Pond’s letter
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Why Sweet Pond has no grade
We grade a lake only when the monitoring record supports a letter: at least three phosphorus or chlorophyll-a samples in the last ten years, scored against EPA National Lakes Assessment thresholds for this lake’s ecoregion. For Sweet Pond, no nutrient or algae measurement meets the evidence bar (at least 3 samples within 10 years).
Not Rated is not an F. It is EPA Integrated Reporting Category 3 — insufficient information. The water here may be excellent or poor; nobody has measured enough of it to say. Everything below that has been measured is still reported on this page.
Sampling is run by VT DEC and volunteer programs, and published through the EPA Water Quality Portal. Read the full grading methodology.
Sweet Pond is a 18-acre lake in Windham County, Vermont.
Source: EPA Water Quality Portal sampling records, VT DEC, last sampled 2021-04-20. Grade methodology: LakeQuality methodology.
Swimming Safety
Not ratedLimited data
The letter is not a swimming clearance. Check local advisories before you swim.
Water quality measurements for Sweet Pond
These readings exist but are not enough for an A–F grade — see why.
No clarity data.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | No recent samples | |
| Phosphorus | No recent samples | |
| Chlorophyll-a (Algae) | No recent samples |
Lake Details
| Characteristic | Value |
|---|---|
| Surface Area | 18 acres |
No bathymetric survey has been published for Sweet Pond, so its depth is not documented here.
Fishing Sweet Pond
Reservoir Info (USACE NID)
Sweet Pond is a man-made reservoir impounded by the Sweet Pond (completed 1928), built primarily for recreation on the Keets Brook; concrete-type dam, 20 ft tall and 77 ft long.
- Surface area
- 18 ac
- Normal storage
- 0 ac-ft
- Max storage
- 216 ac-ft
- Drainage area
- 1.1 sq mi
- Hazard class
- High
- Owner
- STATE OF VERMONT - FPR
Source: USACE National Inventory of Dams, NID ID VT00225 · Operator website
Graded lakes near Sweet Pond
Sweet Pond has no grade, but these lakes within a short drive do.
Nearby Lakes in Windham County
Frequently asked questions about Sweet Pond
Where is Sweet Pond?
- Sweet Pond is a lake in Windham County, Vermont. LakeQuality has not rated this lake (UNRATED) — no nutrient or algae measurement meets the evidence bar (at least 3 samples within 10 years).
What is the water quality grade for Sweet Pond?
- Sweet Pond in Windham County, Vermont is not rated for water quality — its monitoring record does not meet the evidence bar. Surface area: 18 acres.
Is Sweet Pond safe to swim in?
- The letter is not a swimming clearance. Check local advisories before you swim.
Explore Sweet Pond across LakeQuality
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Where this data comes from
3 measurements from 1 monitoring station, 2021. Retrieved from the EPA Water Quality Portal on 2026-08-02.
Collected and reported by
- Vermont Dept of Environmental Conservation
1VTDECWQ3 samples · 2021
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 (1)
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.