Fairfax County, Virginia · Water Quality Report Card
Lake Audubon
Lake Audubon in Fairfax County, Virginia is not rated for water quality — its monitoring record does not meet the evidence bar. Water clarity: 4.1 ft visibility.
- Clarity
- 4.1 ft
- Type
- Eutrophic
- Trend
- ↑ Improving
Lake Audubon is a productive, nutrient-rich eutrophic lake in Fairfax County, Virginia. Overall water quality is improving over recent sampling years.
Source: EPA Water Quality Portal sampling records, Virginia DEQ, last sampled 2022-07-11. Grade methodology: LakeGrade methodology.
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Swimming Safety
Not rated for swimming — there is not enough monitoring data to judge this lake
Water Quality Grade: Not rated
Murky, only visible to about 4.1 ft. Trophic State Index: 57.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 4.1 ft | |
| Phosphorus | No data | |
| Chlorophyll-a (Algae) | No data | |
| Trophic State Index (TSI) | 57 | Eutrophic |
High nutrients, frequent algae, reduced clarity
Where to stay near Lake Audubon
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Fishing Lake Audubon
Water Quality Trend: ↑ Improving
Based on 10 years of monitoring data (2020-2025).
| Metric | Trend | Change/Year | Years |
|---|---|---|---|
| Water Clarity | ↑ Improving | +2.578 m/yr | 10 |
Location
Nearby Lakes in Fairfax County
Explore Lake Audubon across LakeGrade
6.3 mi away · 76 ft
Species activity outlook by water temperature and season
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High nutrients, frequent algae, reduced clarity
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Where this data comes from
11 measurements from 1 monitoring station, 2013–2022. Retrieved from the EPA Water Quality Portal on 2026-08-02.
Collected and reported by
- North American Lake Management Society
NALMS11 samples · 2013–2022
Monitoring station identifiers (1)
Grade thresholds come from the U.S. EPA National Lakes Assessment 2022 Technical Support Document (EPA 841-R-24-006, Table 6-3), applied by ecoregion. See how grades are calculated.
Data Sources
Water quality data from the EPA Water Quality Portal
Grade thresholds from the EPA National Lakes Assessment (EPA 841-R-24-006, Table 6-3), applied by ecoregion
Most recent sample: 2022-07-11
Monitoring stations: 1