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

⏳

JE Roush Lake — 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: JE Roush Lake (0.2 km³).

JE Roush Lake

Sourcing

Capacity: 189 hm³⏳ Pending

About reservoirs in Ohio

As of September 11, 2026, the reservoirs we track across Ohio that report live levels hold roughly 992 hm³ of water — about 56.9% of their combined capacity. Taken together, Ohio's reservoirs are within their normal operating range.

Across the region, 3 reservoirs are at critically low levels and 1 is low. Beach City Lake is the fullest at 105.0%, while Mohawk is the lowest at 0.3%.

Over the most recent week on record, 6 reservoirs rose and 1 reservoir fell across Ohio.

Storage figures for Ohio 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.

Ohio at a glance

Reservoirs tracked: 27
Average fill: 56.9%
Water stored: 992 hm³
Combined capacity: 1,743 hm³
At critically low levels: 3
Fullest: Beach City Lake (105.0%)
Lowest: Mohawk (0.3%)
Last updated: September 11, 2026

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