The State of Nevada's Lakes 2026

Cleanest lakes in Nevada

Cleanest combined nutrient and algae readings, 2026.

1. 1.Illipah Reservoir — White Pine County30 µg/L P · 2 µg/L chl-a
2. 2.Rye Patch Reservoir — Pershing County120 µg/L P · 3 µg/L chl-a
3. 3.Onion Valley Reservoir @ Dam — Humboldt County50 µg/L P · 5 µg/L chl-a
4. 4.Sheep Creek Lake — Elko County6.2 ft clarity · 83 µg/L P · 20 µg/L chl-a
5. 5.Billy Shaw Lake — Elko County34 µg/L P · 15 µg/L chl-a
6. 6.Mountain View Lake — Elko County40 µg/L P · 17 µg/L chl-a
7. 7.Wildhorse Reservoir — Elko County5.9 ft clarity · 107 µg/L P · 67 µg/L chl-a
8. 8.Knott Creek Reservoir — Humboldt County145 µg/L P · 59 µg/L chl-a

Highest measured algae

Highest measured chlorophyll-a (algae) concentration.

1. 1.Wildhorse Reservoir — Elko County67 µg/L chlorophyll-a
2. 2.Sheep Creek Middle Reservoir — Elko County64 µg/L chlorophyll-a
3. 3.Knott Creek Reservoir — Humboldt County59 µg/L chlorophyll-a
4. 4.Spooner Lake — Douglas County41 µg/L chlorophyll-a
5. 5.Willow Creek Reservoir East — Elko County27 µg/L chlorophyll-a

Trending lakes

Improving

1. 1.Illipah Reservoir — White Pine County
2. 2.Rye Patch Reservoir — Pershing County
3. 3.Squaw Creek Reservoir — Washoe County
4. 4.Mountain View Lake — Elko County
5. 5.Wall Canyon Reservoir — Washoe County
6. 6.Wildhorse Reservoir — Elko County
7. 7.Willow Creek Reservoir East — Elko County
8. 8.Willow Creek Reservoir West — Elko County

Declining

1. 1.Walker Lake — Mineral County
2. 2.Sheep Creek Lake — Elko County
3. 3.Billy Shaw Lake — Elko County
4. 4.Boulder Reservoir — Washoe County
5. 5.Onion Valley Reservoir @ Dam — Humboldt County
6. 6.Spooner Lake — Douglas County
7. 7.Comins Reservoir — White Pine County
8. 8.Lake Tahoe — Douglas County