Reservoirs
Reservoirs
Storage vs the historical normal for major western reservoirs.
Data through Aug 26, 2026 · updated Aug 27, 2026
Western reservoir levels, total storage
34.37M af · Aug 25, 2026
- Total storage
Elephant Butte Reservoir water level
Live reservoir storage and water level in Rio Grande basin, New Mexico
27,438 af · Aug 25, 2026
-73% vs 5-yr median
Blue Mesa Reservoir water level
Live reservoir storage and water level in Gunnison-Colorado basin, Colorado
189,745 af · Aug 25, 2026
-60% vs 5-yr median
Lake Powell water level
Live reservoir storage and water level in Colorado (Upper) basin, Arizona / Utah
5.18M af · Aug 25, 2026
-32% vs 5-yr median
Boysen Reservoir water level
Live reservoir storage and water level in Wind-Bighorn-Missouri basin, Wyoming
505,259 af · Aug 26, 2026
-24% vs 5-yr median
Lake Mead water level
Live reservoir storage and water level in Colorado (Lower) basin, Nevada / Arizona
6.92M af · Aug 25, 2026
-20% vs 5-yr median
Navajo Reservoir water level
Live reservoir storage and water level in San Juan-Colorado basin, New Mexico / Colorado
822,606 af · Aug 25, 2026
-20% vs 5-yr median
Flaming Gorge Reservoir water level
Live reservoir storage and water level in Green-Colorado basin, Utah / Wyoming
2.60M af · Aug 25, 2026
-15% vs 5-yr median
Lake Oroville water level
Live reservoir storage and water level in Feather-Sacramento basin, California
2.05M af · Aug 26, 2026
-14% vs 5-yr median
Lake Havasu water level
Live reservoir storage and water level in Colorado (Lower) basin, Arizona / California
530,168 af · Aug 25, 2026
-9% vs 5-yr median
Shasta Lake level
Live reservoir storage and water level in Sacramento basin, California
2.68M af · Aug 26, 2026
-8% vs 5-yr median
New Melones Lake level
Live reservoir storage and water level in San Joaquin basin, California
1.57M af · Aug 26, 2026
-6% vs 5-yr median
Millerton Lake level
Live reservoir storage and water level in San Joaquin basin, California
239,518 af · Aug 26, 2026
-5% vs 5-yr median
Canyon Ferry Lake level
Live reservoir storage and water level in Missouri basin, Montana
1.58M af · Aug 26, 2026
-2% vs 5-yr median
Folsom Lake level
Live reservoir storage and water level in American-Sacramento basin, California
474,332 af · Aug 26, 2026
-2% vs 5-yr median
Hungry Horse Reservoir water level
Live reservoir storage and water level in Flathead-Columbia basin, Montana
3.26M af · Aug 26, 2026
-2% vs 5-yr median
New Don Pedro Reservoir water level
Live reservoir storage and water level in Tuolumne-San Joaquin basin, California
1.63M af · Aug 25, 2026
-1% vs 5-yr median
Whiskeytown Lake level
Live reservoir storage and water level in Sacramento basin, California
237,482 af · Aug 26, 2026
-0% vs 5-yr median
Lake Mohave water level
Live reservoir storage and water level in Colorado (Lower) basin, Nevada / Arizona
1.76M af · Aug 25, 2026
+4% vs 5-yr median
Fontenelle Reservoir water level
Live reservoir storage and water level in Green-Colorado basin, Wyoming
287,243 af · Aug 25, 2026
+7% vs 5-yr median
Trinity Lake level
Live reservoir storage and water level in Trinity-Klamath basin, California
1.79M af · Aug 26, 2026
+33% vs 5-yr median