Augusta County Lake Quality
Virginia, 1 lake, average grade A (Excellent)
Augusta County has 1 monitored lake — 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. Every one of those lake carries an A–F grade, so the county-level summary covers the full set rather than a monitored subset. On average, Augusta County lakes grade an A. That puts it near the top of the Virginia county ranking.
The county's lakes lean shallow, which makes the grades sensitive to wind, sediment-resuspension, and any nutrient inputs from the watershed. The cleanest lake on the books is Coles Run Reservoir (A); the most-stressed is Coles Run Reservoir (A).
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Quick Answers for Augusta County
Planning a trip? Check special fishing regulations for Coles Run Reservoir — or check the official Virginia fishing regulations.
All Lakes in Augusta County
1 lake1 graded lake
| # | Lake | Grade | Clarity | Phosphorus | Algae | Trophic | Access |
|---|---|---|---|---|---|---|---|
| 1 | AColes Run ReservoirAugusta | A | 25.8 ft | 5 µg/L | 0.5 µg/L | No recent samples | Not recorded |
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Other Counties in Virginia
See how Augusta 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.