Douglas County Lake Quality
Nevada, 4 lakes, average grade B (Good)
Douglas County has 4 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. With an average grade of B, Douglas County sits comfortably above the {{stateName}} median.
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. Lake Tahoe (A) is the cleanest in the county.
Quick Answers for Douglas County
Planning a trip? Check special fishing regulations for Lake Tahoe — or check the official Nevada fishing regulations.
All Lakes in Douglas County
| Rank | Lake | Grade | Clarity | Phosphorus |
|---|---|---|---|---|
| 1 | Lake Tahoe | A | - | - |
| 2 | Lake Tahoe | A | - | - |
| 3 | Nla Lake | C | 7.3 ft | 21000 µg/L |
| 4 | Spooner Lake | D | - | 40 µg/L |
Other Counties in Nevada
See how Douglas 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 Douglas County
Top-rated places to stay near Douglas County
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Source: EPA National Aquatic Resource Surveys, 2026.