Storage from official US gauges (USGS, USACE, Bureau of Reclamation, CDEC). Fill % uses design capacity from the National Inventory of Dams where available; a few sites without a match fall back to the 5-year maximum.

About reservoirs in Missouri

As of September 11, 2026, the reservoirs we track across Missouri that report live levels hold roughly 3,545 hm³ of water — about 31.4% of their combined capacity. Taken together, Missouri's reservoirs are low.

Across the region, 1 reservoir is at critically low levels and 2 are low. Longview Dam & Reservoir is the fullest at 98.9%, while Wappapello Pool is the lowest at 10.8%.

Over the most recent week on record, 1 reservoir rose and 2 reservoirs fell across Missouri.

Storage figures for Missouri come from USGS · USACE · BOR · CDEC; the most recent reading is from September 11, 2026. Each reservoir below links to its own page with full history and seasonal context.

Missouri at a glance

Reservoirs tracked: 10
Average fill: 31.4%
Water stored: 3,545 hm³
Combined capacity: 11,279 hm³
At critically low levels: 1
Fullest: Longview Dam & Reservoir (98.9%)
Lowest: Wappapello Pool (10.8%)
Last updated: September 11, 2026

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