Lake Gaston is a mesotrophic lake in Mecklenburg County, Virginia. Water quality is graded B based on 2 sampling years through 2026. Compared to the 8 other monitored lakes in Mecklenburg County, Lake Gaston ranks #5 for water quality.
Source: EPA Water Quality Portal sampling records, Virginia DNR, last sampled 2026-06-25. Grade methodology: LakeGrade methodology.
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Swimming Safety
Good for swimming, clear water with low algae levels
Water Quality Grade: B, Good
Murky, only visible to about 4.3 ft. Phosphorus level: 20 µg/L. Chlorophyll-a: 4.1 µg/L. Trophic State Index: 49.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 4.3 ft | D |
| Phosphorus | 20 µg/L | B |
| Chlorophyll-a (Algae) | 4.1 µg/L | B |
| Trophic State Index (TSI) | 49 | Mesotrophic |
Moderate nutrients, good water quality
Where to stay near Lake Gaston
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Fishing Lake Gaston
Location
County Ranking
Ranked #5 of 9 lakes in Mecklenburg County
Nearby Lakes in Mecklenburg County
Explore Lake Gaston across LakeGrade
More Virginia Lake Rankings
Other Grade B Lakes in Virginia
Nottoway County · Clarity: 5.5 ft
Prince Edward County · Clarity: 3.9 ft
Prince Edward County · Clarity: 3.3 ft
Chesterfield County · Good
Amelia County · Clarity: 3.9 ft
Louisa County · Clarity: 4.9 ft
Mesotrophic Lakes in Virginia
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: 2026-06-25
Monitoring stations: 4