California

As of September 10, 2026, the reservoirs we track across California that report live levels hold roughly 19,385 hm³ of water — about 60.8% of their combined capacity. Taken together, California's reservoirs are within their normal operating range.

Across the region, 3 reservoirs are at critically low levels and 3 are low. Lake McSwain is the fullest at 105.0%, while Bear Reservoir is the lowest at 0.0%.

Over the most recent week on record, 1 reservoir rose and 7 reservoirs fell across California.

Storage figures for California come from USGS · USACE · BOR · CDEC; the most recent reading is from September 10, 2026. Each reservoir below links to its own page with full history and seasonal context.