Clark County Lake Quality
Kentucky, 1 lakes, average grade F (Very Poor)
Clark County has 1 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 average is F — the most-stressed bracket in our rubric. Most monitored lakes here show persistent nutrient loading and algal pressure.
Most of the county's monitored lakes are shallow — under 50 feet — which means wind keeps the water column mixed all summer and sediment-bound phosphorus releases back into the surface layer whenever the bottom is disturbed. Winchester Reservoir (F) is the cleanest in the county.
Quick Answers for Clark County
Planning a trip? Check special fishing regulations for Winchester Reservoir — or check the official Kentucky fishing regulations.
All Lakes in Clark County
| Rank | Lake | Grade | Clarity | Phosphorus |
|---|---|---|---|---|
| 1 | Winchester Reservoir | F | - | 129 µg/L |
Other Counties in Kentucky
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.