Prince William County Lake Quality
Virginia, 1 lakes, average grade D (Poor)
Only 1 lakes in Prince William County carry an active grade. The county-level summary is therefore representative of those specific lakes, not necessarily of every water body in the county. On average, Prince William County lakes grade D, with phosphorus loading and reduced clarity showing up across most of the dataset.
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 Nla Lake (D); the most-stressed is Nla Lake (D).
Quick Answers for Prince William County
Planning a trip? Check special fishing regulations for Nla Lake — or check the official Virginia fishing regulations.
All Lakes in Prince William County
| Rank | Lake | Grade | Clarity | Phosphorus |
|---|---|---|---|---|
| 1 | Nla Lake | D | 4.4 ft | 9508 µg/L |
Other Counties in Virginia
See how Prince William County stacks up in the national county water-quality rankings, or browse the full directory of graded lakes across all 34 states.
Where to stay near Prince William County
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Source: EPA National Aquatic Resource Surveys, 2026.