Reservoirs
Reservoirs
Storage vs the historical normal for major western reservoirs.
Data through Aug 12, 2026 · updated Aug 13, 2026
Western reservoir levels, total storage
35.45M af · Aug 11, 2026
- Total storage
Elephant Butte Reservoir water level
Live reservoir storage and water level in Rio Grande basin, New Mexico
27,141 af · Aug 12, 2026
-73% vs 5-yr median
Blue Mesa Reservoir water level
Live reservoir storage and water level in Gunnison-Colorado basin, Colorado
215,308 af · Aug 12, 2026
-57% vs 5-yr median
Lake Powell water level
Live reservoir storage and water level in Colorado (Upper) basin, Arizona / Utah
5.28M af · Aug 12, 2026
-32% vs 5-yr median
Boysen Reservoir water level
Live reservoir storage and water level in Wind-Bighorn-Missouri basin, Wyoming
519,514 af · Aug 12, 2026
-24% vs 5-yr median
Lake Mead water level
Live reservoir storage and water level in Colorado (Lower) basin, Nevada / Arizona
6.97M af · Aug 12, 2026
-19% vs 5-yr median
Navajo Reservoir water level
Live reservoir storage and water level in San Juan-Colorado basin, New Mexico / Colorado
861,191 af · Aug 12, 2026
-18% vs 5-yr median
Flaming Gorge Reservoir water level
Live reservoir storage and water level in Green-Colorado basin, Utah / Wyoming
2.64M af · Aug 12, 2026
-15% vs 5-yr median
Lake Havasu water level
Live reservoir storage and water level in Colorado (Lower) basin, Arizona / California
523,653 af · Aug 12, 2026
-11% vs 5-yr median
Lake Oroville water level
Live reservoir storage and water level in Feather-Sacramento basin, California
2.29M af · Aug 12, 2026
-11% vs 5-yr median
New Melones Lake level
Live reservoir storage and water level in San Joaquin basin, California
1.59M af · Aug 12, 2026
-6% vs 5-yr median
Shasta Lake level
Live reservoir storage and water level in Sacramento basin, California
2.87M af · Aug 12, 2026
-6% vs 5-yr median
Millerton Lake level
Live reservoir storage and water level in San Joaquin basin, California
267,197 af · Aug 12, 2026
-4% vs 5-yr median
Canyon Ferry Lake level
Live reservoir storage and water level in Missouri basin, Montana
1.62M af · Aug 12, 2026
-3% vs 5-yr median
New Don Pedro Reservoir water level
Live reservoir storage and water level in Tuolumne-San Joaquin basin, California
1.67M af · Aug 11, 2026
-1% vs 5-yr median
Hungry Horse Reservoir water level
Live reservoir storage and water level in Flathead-Columbia basin, Montana
3.32M af · Aug 12, 2026
-1% vs 5-yr median
Whiskeytown Lake level
Live reservoir storage and water level in Sacramento basin, California
237,768 af · Aug 12, 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 12, 2026
+3% vs 5-yr median
Fontenelle Reservoir water level
Live reservoir storage and water level in Green-Colorado basin, Wyoming
290,860 af · Aug 12, 2026
+5% vs 5-yr median
Folsom Lake level
Live reservoir storage and water level in American-Sacramento basin, California
556,962 af · Aug 12, 2026
+6% vs 5-yr median
Trinity Lake level
Live reservoir storage and water level in Trinity-Klamath basin, California
1.85M af · Aug 12, 2026
+33% vs 5-yr median