Lamoille County Lake Quality
Vermont, 14 lakes, average grade A (Excellent)
Lamoille County has 14 monitored lakes — a thin enough sample that one or two stressed lakes can move the county average noticeably. Use the per-lake pages below for what actually matters. 6 of those lakes carry an A–F grade. The county-level summary describes that subset, not every water body listed. The county's average grade is A — among the cleanest in Vermont. 5 lakes pull an A on their own, and almost none fall into the D or F brackets.
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. South Pond (A) is the cleanest in the county.
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Quick Answers for Lamoille County
Planning a trip? Check special fishing regulations for South Pond — or check the official Vermont fishing regulations.
All Lakes in Lamoille County
14 lakes · 6 graded, 8 not rated6 graded lakes · 8 not rated, hidden
| # | Lake | Grade | Clarity | Phosphorus | Algae | Trophic | Access |
|---|---|---|---|---|---|---|---|
| 1 | ASouth PondLamoille | A | 15.4 ft | 8.2 µg/L | 2.3 µg/L | No recent samples | Not recorded |
| 2 | ALake EdenLamoille | A | 12.8 ft | 12.3 µg/L | 3.5 µg/L | No recent samples | ✓ Public |
| 3 | ALake ElmoreLamoille | A | 9.8 ft | 15.9 µg/L | 3 µg/L | No recent samples | ✓ Public |
| 4 | ALake MansfieldLamoille | A | 6.9 ft | 12.1 µg/L | 3.1 µg/L | No recent samples | Not recorded |
| 5 | AGreen River ReservoirLamoille | A | 13.1 ft | 7.4 µg/L | 1.4 µg/L | No recent samples | Not recorded |
| 6 | CHardwood PondLamoille | C | 6.9 ft | 16.8 µg/L | No recent samples | No recent samples | Not recorded |
| NRWolcott PondLamoille | NR | 7.2 ft | No recent samples | No recent samples | No recent samples | ✓ Public | |
| NRZack Woods PondLamoille | NR | 9.8 ft | No recent samples | No recent samples | No recent samples | Not recorded | |
| NRSchofield PondLamoille | NR | No recent samples | No recent samples | No recent samples | No recent samples | Not recorded | |
| NRRitterbush PondLamoille | NR | No recent samples | No recent samples | No recent samples | No recent samples | Not recorded | |
| NRBelvidere PondLamoille | NR | No recent samples | No recent samples | No recent samples | No recent samples | Not recorded | |
| NRLake LamoilleLamoille | NR | No recent samples | No recent samples | No recent samples | No recent samples | Not recorded | |
| NRLittle Elmore PondLamoille | NR | No recent samples | No recent samples | No recent samples | No recent samples | Not recorded | |
| NRLake EdenLamoille | NR | No recent samples | No recent samples | No recent samples | No recent samples | Not recorded |
NR = not rated: there is not enough recent sampling to support a letter. That is EPA Integrated Reporting Category 3 (insufficient information), not a failing grade. How grading works.
Lake Match
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Other Counties in Vermont
See how Lamoille County stacks up in the national county water-quality rankings, or browse the full directory of graded lakes across all United States (49 states), Canada (Ontario, Québec, Nova Scotia, British Columbia and Newfoundland and Labrador), and 38 other country hubs..
Source: EPA National Aquatic Resource Surveys, 2026.