State · United States · USGS · BOR · USACE · CDEC
Mississippi
51.6% average fill
Measured
5
Data pending
2
Volume stored
1,650 hm³
Measured capacity
3,198 hm³
Critical
1
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Reservoirs
Sorted by capacitySardis Lake
Updated 2026-07-30
Grenada Lake
Updated 2026-07-30
Enid Lake
Updated 2026-07-30
Arkabutla Lake
criticalUpdated 2026-07-30
Okatibbee Lake
Updated 2026-07-30
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.
Major reservoirs — data pending
2 major reservoirs — data sourcing in progress
Storage is monitored by the US Army Corps of Engineers (USACE CWMS), but the live feed is currently stale — we are working to restore it. Known capacities: John Rankin Lock and Dam (0.0 km³), Stennis Lock and Dam (0.2 km³).
About reservoirs in Mississippi
As of July 30, 2026, the reservoirs we track across Mississippi that report live levels hold roughly 1,650 hm³ of water — about 51.6% of their combined capacity. Taken together, Mississippi's reservoirs are within their normal operating range.
Across the region, 1 reservoir is at critically low levels. Okatibbee Lake is the fullest at 89.8%, while Arkabutla Lake is the lowest at 6.6%.
Storage figures for Mississippi come from USGS · USACE · BOR · CDEC; the most recent reading is from July 30, 2026. Each reservoir below links to its own page with full history and seasonal context.
Mississippi at a glance
- Reservoirs tracked
- 5
- Average fill
- 51.6%
- Water stored
- 1,650 hm³
- Combined capacity
- 3,198 hm³
- At critically low levels
- 1
- Fullest
- Okatibbee Lake (89.8%)
- Lowest
- Arkabutla Lake (6.6%)
- Last updated
- July 30, 2026
Frequently asked questions
How full are reservoirs in Mississippi right now?
As of July 30, 2026, the reservoirs tracked in Mississippi that report live levels are 51.6% full overall, holding about 1,650 hm³ of water.
How many reservoirs are there in Mississippi?
reservoirs.earth tracks 5 reservoirs in Mississippi, with a combined storage capacity of 3,198 hm³.
Which reservoir in Mississippi is the fullest?
Okatibbee Lake is currently the fullest reservoir in Mississippi, at 89.8% of capacity.
Which reservoir in Mississippi is the lowest?
Arkabutla Lake is currently the lowest in Mississippi, at 6.6% of capacity.
Where does the reservoir data for Mississippi come from?
All storage figures for Mississippi come from USGS · USACE · BOR · CDEC, an official source, last updated July 30, 2026.