Mollys Falls Reservoir is a mesotrophic lake in Washington County, Vermont. Water quality is graded B based on 1 sampling years through 2025. Compared to the 16 other monitored lakes in Washington County, Mollys Falls Reservoir ranks #16 for water quality.
Source: EPA Water Quality Portal sampling records, Vermont DNR, last sampled 2025-08-06. Grade methodology: LakeGrade methodology.
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Swimming Safety
Good for swimming, clear water with low algae levels
Water Quality Grade: B, Good
Good clarity, visible to about 10.8 ft. Trophic State Index: 43.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 10.8 ft | B |
| Phosphorus | No data | |
| Chlorophyll-a (Algae) | No data | |
| Trophic State Index (TSI) | 43 | Mesotrophic |
Moderate nutrients, good water quality
Where to stay near Mollys Falls Reservoir
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Fishing Mollys Falls Reservoir
Location
County Ranking
Ranked #16 of 17 lakes in Washington County
Cleaner Lakes Within 30 Miles
Mollys Falls Reservoir holds Grade B. 5 nearby lakes hold higher grades.
- APeacham PondCaledonia County · 2.8 mi · Higher grade (B → A)
- AOsmore PondCaledonia County · 3.7 mi · Higher grade (B → A)
- AFosters PondCaledonia County · 4.8 mi · Higher grade (B → A)
- AKettle PondWashington County · 4.8 mi · Higher grade (B → A)
- AJoes PondCaledonia County · 5.1 mi · Higher grade (B → A)
Nearby Lakes in Washington County
Explore Mollys Falls Reservoir across LakeGrade
More Vermont Lake Rankings
Other Grade B Lakes in Vermont
Mesotrophic Lakes in Vermont
More records, surveys & data sources
Data Sources
Water quality data from the EPA Water Quality Portal
Grading methodology based on Metropolitan Council standards
Most recent sample: 2025-08-06
Monitoring stations: 1