Clark County Lake Quality
Washington, 3 lakes, average grade D (Poor)
Clark County has 3 graded lakes — 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. The county-wide average grade is D — water quality issues are persistent across most of the monitored basins. 1 lakes fall into the F bracket outright.
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 Lacamas Lake (D); the most-stressed is Nla Lake (F).
Quick Answers for Clark County
Planning a trip? Check special fishing regulations for Lacamas Lake — or check the official Washington fishing regulations.
All Lakes in Clark County
| Rank | Lake | Grade | Clarity | Phosphorus |
|---|---|---|---|---|
| 1 | Lacamas Lake | D | 4.4 ft | - |
| 2 | Vancouver Lake | D | 1.2 ft | 60 µg/L |
| 3 | Nla Lake | F | 3.3 ft | 74000 µg/L |
Other Counties in Washington
See how Clark 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 Clark County
Top-rated places to stay near Clark County
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Source: EPA National Aquatic Resource Surveys, 2026.