Amherst Lake
Windsor County, Vermont76 acresView mapDirections
Clarity, phosphorus, and algae all sit in the cleanest band for this region.
- Oligotrophic
- #4 of 8 in the county
- 33 ft max depth
- Public access
Amherst Lake in Windsor County, Vermont has a water quality grade of A (Excellent). Water clarity: 15.4 ft visibility. Phosphorus: 8.8 µg/L. Chlorophyll-a (algae): 1.2 µg/L. Surface area: 76 acres.
- Clarity
- 15.4 ft
- Max depth
- ~33 ft est.
- Area
- 76 acres
- Type
- Oligotrophic
- Phosphorus
- 8.8 µg/L
- Chlorophyll-a
- 1.2 µg/L
- Trend
- ↑ Improving
- Public access
- Yes
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Watch Amherst Lake’s letter
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Amherst Lake is a 76-acre cold, clear oligotrophic lake in Windsor County, Vermont with an estimated average depth of about 33 feet. Water quality is graded A based on 2 sampling years through 2025. Overall water quality is improving over recent sampling years. Limited fish-species data available. Public access is available with 1 public boat landing. Compared to the 7 other monitored lakes in Windsor County, Amherst Lake ranks #4 for water quality.
Source: EPA Water Quality Portal sampling records, VT DEC, last sampled 2025-08-22. Grade methodology: LakeQuality methodology.
What Amherst Lake is good for
From access and monitoring records, not editorial picks.
- Clear water15.4 ft of visibility
- Boat launch1 documented ramp
Swimming Safety
Grade onlyLow algae
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 A is nutrients and algae, not a swimming clearance. Check local advisories before you swim.
Water Quality Grade: A (Excellent)
Crystal clear, you can see 15.4 ft down. Phosphorus 8.8 µg/L. Chlorophyll-a 1.2 µg/L. TSI 35. The letter is not a swimming clearance.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 15.4 ft | Not graded |
| Phosphorus | 8.8 µg/L | Good |
| Chlorophyll-a (Algae) | 1.2 µg/L | Good |
| Trophic State Index (TSI) | 35 | Oligotrophic |
Low nutrients, clear water. The letter is not a swimming clearance.
Lake Details
| Characteristic | Value |
|---|---|
| Maximum Depth | ~33 ft est. |
| Average Depth | ~26 ft est. |
| Surface Area | 76 acres |
| Public Access | Yes |
Depth marked “est.” is a modeled maximum from GLOBathy (Khazaei et al. 2022, CC0), not a measured survey. Vermont has not published bathymetry for Amherst Lake.
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.
Recreation & Access
- Amherst LakePublic
Named access points in the USGS National Boat Ramps inventory, within about 3 miles. More lakes with boat ramps
Fishing Amherst Lake
Water Quality Trend: ↑ Improving
Based on 5 years of monitoring data (2020-2025).
| Metric | Trend | Change/Year | Years |
|---|---|---|---|
| Water Clarity | ↓ Declining | -0.168 m/yr | 5 |
| Phosphorus | ↑ Improving | -0.98 µg/L/yr | 5 |
| Chlorophyll-a | ↑ Improving | -0.36 µg/L/yr | 5 |
Reservoir Info (USACE NID)
Amherst Lake is a man-made reservoir impounded by the Amherst Lake, built primarily for recreation on the Echo Lake-Tr; concrete-type dam, 17 ft tall and 96 ft long.
- Surface area
- 76 ac
- Normal storage
- 0 ac-ft
- Max storage
- 1,050 ac-ft
- Drainage area
- 19.06 sq mi
- Hazard class
- Significant
- Owner
- LAKESIDE ASSOCIATES, INC.
Source: USACE National Inventory of Dams, NID ID VT00131 · Operator website
County Ranking
Ranked #4 of 8 lakes in Windsor County
Nearby Lakes in Windsor County
Frequently asked questions about Amherst Lake
Where is Amherst Lake?
- Amherst Lake is a lake in Windsor County, Vermont. LakeQuality grades it A for nutrients and algae. The letter is not a swimming clearance.
What is the water quality grade for Amherst Lake?
- Amherst Lake in Windsor County, Vermont has a water quality grade of A (Excellent). Water clarity: 15.4 ft visibility. Phosphorus: 8.8 µg/L. Chlorophyll-a (algae): 1.2 µg/L. Surface area: 76 acres.
Is Amherst Lake safe to swim in?
- The A is nutrients and algae, not a swimming clearance. Check local advisories before you swim.
How deep is Amherst Lake?
- No published bathymetric survey covers Amherst Lake, so its depth has not been measured. The HydroLAKES global model estimates an average depth of about 33 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 76 acres.
Are there boat ramps on Amherst Lake?
- Amherst Lake has 1 documented boat landing in the USGS National Boat Ramps inventory. Named access points include Amherst Lake. Public access is listed as yes.
Explore Amherst Lake 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 A Lakes in Vermont
Oligotrophic Lakes in Vermont
Where this data comes from
106 measurements from 1 monitoring station, 2021–2025. Retrieved from the EPA Water Quality Portal on 2026-08-02.
Collected and reported by
- Vermont Dept of Environmental Conservation
1VTDECWQ106 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 (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.
Other records on this page
Lake size & watershed from HydroLAKES (HydroSHEDS)
Named boat-access points from the USGS National Boat Ramps inventory