Oregon

As of September 10, 2026, the reservoirs we track across Oregon that report live levels hold roughly 492 hm³ of water — about 16.2% of their combined capacity. Taken together, Oregon's reservoirs are critically low.

Across the region, 15 reservoirs are at critically low levels and 5 are low. Haystack Reservoir is the fullest at 95.8%, while Thief Valley Reservoir is the lowest at 0.0%.

Over the most recent week on record, 1 reservoir rose and 5 reservoirs fell across Oregon.

Storage figures for Oregon 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.