Clyde Pond
Orleans County, Vermont200 acresView mapDirections
Clarity, phosphorus, and algae all sit in the cleanest band for this region.
↑ up from B at the last regrade
- Mesotrophic
- #10 of 17 in the county
- 40 ft max depth
- Limited data
Clyde Pond in Orleans County, Vermont has a water quality grade of A (Excellent). Water clarity: 9.4 ft visibility. Phosphorus: 14.7 µg/L. Chlorophyll-a (algae): 2.7 µg/L. Surface area: 200 acres.
- Clarity
- 9.4 ft
- Max depth
- ~40 ft est.
- Area
- 200 acres
- Type
- Mesotrophic
- Phosphorus
- 14.7 µg/L
- Chlorophyll-a
- 2.7 µg/L
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Watch Clyde Pond’s letter
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Clyde Pond is a 200-acre mesotrophic lake in Orleans County, Vermont with an estimated average depth of about 40 feet. Water quality is graded A based on 2 sampling years through 2023. Compared to the 16 other monitored lakes in Orleans County, Clyde Pond ranks #10 for water quality.
Source: EPA Water Quality Portal sampling records, VT DEC, last sampled 2023-09-03. 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 A is nutrients and algae, not a swimming clearance. Check local advisories before you swim.
Water Quality Grade: A (Excellent)
Moderate clarity, visible to about 9.4 ft. Phosphorus 14.7 µg/L. Chlorophyll-a 2.7 µg/L. TSI 43. The letter is not a swimming clearance.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 9.4 ft | Not graded |
| Phosphorus | 14.7 µg/L | Good |
| Chlorophyll-a (Algae) | 2.7 µg/L | Good |
| Trophic State Index (TSI) | 43 | Mesotrophic |
Moderate nutrients, good water quality
Lake Details
| Characteristic | Value |
|---|---|
| Maximum Depth | ~40 ft est. |
| Average Depth | ~18 ft est. |
| Surface Area | 200 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 Clyde 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 Clyde Pond
Reservoir Info (USACE NID)
Clyde Pond is a man-made reservoir impounded by the Newport (completed 1936), built primarily for hydroelectric on the Clyde River; masonry-type dam, 22 ft tall and 713 ft long.
- Surface area
- 200 ac
- Normal storage
- 3,000 ac-ft
- Max storage
- 3,000 ac-ft
- Drainage area
- 142 sq mi
- Hazard class
- High
- Owner
- Great Bay Hydro Corporation
Source: USACE National Inventory of Dams, NID ID VT00020 · Operator website
County Ranking
Ranked #10 of 17 lakes in Orleans County
Nearby Lakes in Orleans County
Frequently asked questions about Clyde Pond
Where is Clyde Pond?
- Clyde Pond is a lake in Orleans County, Vermont. LakeQuality grades it A for nutrients and algae. The letter is not a swimming clearance.
What is the water quality grade for Clyde Pond?
- Clyde Pond in Orleans County, Vermont has a water quality grade of A (Excellent). Water clarity: 9.4 ft visibility. Phosphorus: 14.7 µg/L. Chlorophyll-a (algae): 2.7 µg/L. Surface area: 200 acres.
Is Clyde Pond safe to swim in?
- The A is nutrients and algae, not a swimming clearance. Check local advisories before you swim.
How deep is Clyde Pond?
- No published bathymetric survey covers Clyde 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 200 acres.
Explore Clyde Pond across LakeQuality
More Vermont Lake Rankings
Other Grade A Lakes in Vermont
Mesotrophic Lakes in Vermont
Where this data comes from
19 measurements from 1 monitoring station, 2022–2023. Retrieved from the EPA Water Quality Portal on 2026-08-02.
Collected and reported by
- Vermont Dept of Environmental Conservation
1VTDECWQ19 samples · 2022–2023
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)