Each basin's figure is storage-weighted: total conservation storage divided by total conservation capacity, so large reservoirs count for more than small ones. Sorted driest first.
3 reservoirs · 1.09M af of 3.52M af
2 reservoirs · 367,225 af of 918,882 af
19 reservoirs · 2.55M af of 4.02M af
8 reservoirs · 2.44M af of 3.48M af
3 reservoirs · 321,664 af of 399,063 af
28 reservoirs · 2.94M af of 3.58M af
13 reservoirs · 2.09M af of 2.47M af
24 reservoirs · 5.85M af of 6.78M af
6 reservoirs · 3.37M af of 3.87M af
5 reservoirs · 517,437 af of 584,975 af
4 reservoirs · 526,219 af of 549,895 af