Lake Anna is a productive, nutrient-rich eutrophic lake in Spotsylvania County, Virginia. Water quality is graded C based on 2 sampling years through 2026. Compared to the 17 other monitored lakes in Spotsylvania County, Lake Anna ranks #13 for water quality.
Source: EPA Water Quality Portal sampling records, Virginia DNR, last sampled 2026-07-07. Grade methodology: LakeGrade methodology.
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Swimming Safety
Swim with caution, moderate algae may be present
Water Quality Grade: C, Fair
Very murky, less than 3.3 ft of visibility. Phosphorus level: 20 µg/L. Chlorophyll-a: 20.6 µg/L. Trophic State Index: 56.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 3.3 ft | D |
| Phosphorus | 20 µg/L | B |
| Chlorophyll-a (Algae) | 20.6 µg/L | D |
| Trophic State Index (TSI) | 56 | Eutrophic |
High nutrients, frequent algae, reduced clarity
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Fishing Lake Anna
Location
County Ranking
Ranked #13 of 18 lakes in Spotsylvania County
Nearby Lakes in Spotsylvania County
Explore Lake Anna across LakeGrade
More Virginia Lake Rankings
Other Grade C Lakes in Virginia
Eutrophic 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: 2026-07-07
Monitoring stations: 29