Orleans County Lake Quality
Vermont, 30 lakes, average grade A (Excellent)
There are 30 graded lakes in Orleans County. The mix is varied enough that the county-level average tells you the broad strokes, not the choose-this-cabin specifics. On average, Orleans County lakes grade an A. That puts it near the top of the {{stateName}} county ranking.
Most of the county's monitored lakes are shallow — under 50 feet — which means wind keeps the water column mixed all summer and sediment-bound phosphorus releases back into the surface layer whenever the bottom is disturbed. Caspian Lake (A) is the cleanest in the county.
Quick Answers for Orleans County
Planning a trip? Check special fishing regulations for Caspian Lake — or check the official Vermont fishing regulations.
All Lakes in Orleans County
| Rank | Lake | Grade | Clarity | Phosphorus |
|---|---|---|---|---|
| 1 | Caspian Lake | A | 29.5 ft | 7.8 µg/L |
| 2 | Seymour Lake | A | 24.6 ft | 7.8 µg/L |
| 3 | Long Pond | A | - | 15.6 µg/L |
| 4 | Echo Lake | A | 23 ft | 8 µg/L |
| 5 | Lake Willoughby | A | 28.2 ft | 7.8 µg/L |
| 6 | Crystal Lake | A | 19.4 ft | 5.4 µg/L |
| 7 | Shadow Lake | A | 28.9 ft | 8.4 µg/L |
| 8 | Lake Elligo | A | 26.2 ft | 6.8 µg/L |
| 9 | Little Hosmer Pond | A | - | 9.2 µg/L |
| 10 | Beaver Pond Outlet | A | - | 7.1 µg/L |
| 11 | Jobs Pond | A | - | 7.8 µg/L |
| 12 | Horse Pond | A | - | 10.7 µg/L |
| 13 | Daniels Pond | A | - | 13.6 µg/L |
| 14 | Great Hosmer Pond | A | 20.3 ft | 20.3 µg/L |
| 15 | Lake Salem | A | 13.1 ft | 14.8 µg/L |
| 16 | Round Pond | A | 16.7 ft | 8.6 µg/L |
| 17 | Lake Parker | A | 13.1 ft | 15.5 µg/L |
| 18 | Tildys Pond | A | - | 21.1 µg/L |
| 19 | Baker Pond | A | - | 23.3 µg/L |
| 20 | Lake Derby | A | - | 9.6 µg/L |
| 21 | Lake Memphremagog | B | 10.5 ft | 14.1 µg/L |
| 22 | Long Pond | B | 14.2 ft | 19.3 µg/L |
| 23 | Holland Pond | B | 7.9 ft | 10.6 µg/L |
| 24 | Bald Hill Pond | B | 13.1 ft | 10.6 µg/L |
| 25 | Pensioner Pond | B | 9.7 ft | 14.3 µg/L |
| 26 | Clyde Pond | B | 9.4 ft | 14.7 µg/L |
| 27 | Beaver Pond | B | 7.9 ft | 9.3 µg/L |
| 28 | South Bay Lake | C | 4.4 ft | 22.7 µg/L |
| 29 | Brownington Pond | C | 8.5 ft | - |
| 30 | Walker Pond | C | - | 51.4 µg/L |
Other Counties in Vermont
See how Orleans County stacks up in the national county water-quality rankings, or browse the full directory of graded lakes across all 17 states.
Where to stay near Orleans County
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Source: EPA National Aquatic Resource Surveys, 2026.