Reservoirs
Reservoirs
Storage vs the historical normal for major western reservoirs.
Data through Sep 30, 2026 · updated Oct 1, 2026
Western reservoir levels, total storage
34.34M af · Sep 23, 2026
- Total storage
Elephant Butte Reservoir water level
Live reservoir storage and water level in Rio Grande basin, New Mexico
31,826 af · Sep 23, 2026
-71% vs 5-yr median
Blue Mesa Reservoir water level
Live reservoir storage and water level in Gunnison-Colorado basin, Colorado
144,461 af · Sep 23, 2026
-66% vs 5-yr median
Lake Powell water level
Live reservoir storage and water level in Colorado (Upper) basin, Arizona / Utah
5.13M af · Sep 23, 2026
-30% vs 5-yr median
Boysen Reservoir water level
Live reservoir storage and water level in Wind-Bighorn-Missouri basin, Wyoming
492,554 af · Sep 23, 2026
-23% vs 5-yr median
Lake Mead water level
Live reservoir storage and water level in Colorado (Lower) basin, Nevada / Arizona
6.84M af · Sep 23, 2026
-21% vs 5-yr median
Navajo Reservoir water level
Live reservoir storage and water level in San Juan-Colorado basin, New Mexico / Colorado
787,623 af · Sep 23, 2026
-18% vs 5-yr median
Flaming Gorge Reservoir water level
Live reservoir storage and water level in Green-Colorado basin, Utah / Wyoming
2.52M af · Sep 23, 2026
-16% vs 5-yr median
Lake Oroville water level
Live reservoir storage and water level in Feather-Sacramento basin, California
1.63M af · Sep 30, 2026
-14% vs 5-yr median
Lake Havasu water level
Live reservoir storage and water level in Colorado (Lower) basin, Arizona / California
513,317 af · Sep 23, 2026
-11% vs 5-yr median
Millerton Lake level
Live reservoir storage and water level in San Joaquin basin, California
230,194 af · Sep 23, 2026
-11% vs 5-yr median
Shasta Lake level
Live reservoir storage and water level in Sacramento basin, California
2.48M af · Sep 23, 2026
-8% vs 5-yr median
New Melones Lake level
Live reservoir storage and water level in San Joaquin basin, California
1.54M af · Sep 23, 2026
-5% vs 5-yr median
Folsom Lake level
Live reservoir storage and water level in American-Sacramento basin, California
433,496 af · Sep 23, 2026
-4% vs 5-yr median
Hungry Horse Reservoir water level
Live reservoir storage and water level in Flathead-Columbia basin, Montana
3.15M af · Sep 23, 2026
-2% vs 5-yr median
Whiskeytown Lake level
Live reservoir storage and water level in Sacramento basin, California
236,846 af · Sep 23, 2026
-0% vs 5-yr median
Canyon Ferry Lake level
Live reservoir storage and water level in Missouri basin, Montana
1.51M af · Sep 23, 2026
+0% vs 5-yr median
New Don Pedro Reservoir water level
Live reservoir storage and water level in Tuolumne-San Joaquin basin, California
1.53M af · Sep 29, 2026
+0% vs 5-yr median
Lake Mohave water level
Live reservoir storage and water level in Colorado (Lower) basin, Nevada / Arizona
1.64M af · Sep 23, 2026
+1% vs 5-yr median
Fontenelle Reservoir water level
Live reservoir storage and water level in Green-Colorado basin, Wyoming
276,396 af · Sep 23, 2026
+14% vs 5-yr median
Trinity Lake level
Live reservoir storage and water level in Trinity-Klamath basin, California
1.70M af · Sep 23, 2026
+32% vs 5-yr median
San Luis Reservoir water level
Live reservoir storage and water level in San Joaquin-Delta basin, California
1.47M af · Sep 30, 2026
+45% vs 5-yr median