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

⏳

3 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: Glen Elder Dam (Waconda Lake) (0.3 km³), Kirwin Dam (0.1 km³), Lovewell Dam (0.1 km³).

Glen Elder Dam (Waconda Lake)

Sourcing

Capacity: 298 hm³⏳ Pending

Kirwin Dam

Sourcing

Capacity: 123 hm³⏳ Pending

Lovewell Dam

Sourcing

Capacity: 51 hm³⏳ Pending

About reservoirs in Kansas

As of June 11, 2026, the reservoirs we track across Kansas that report live levels hold roughly 6,758 hm³ of water — about 80.3% of their combined capacity. Taken together, Kansas's reservoirs are high.

Across the region, 2 reservoirs are at critically low levels and 3 are low. MILFORD LAKE NR JUNCTION CITY, KS is the fullest at 105.0%, while Webster Reservoir and Dam is the lowest at 13.9%.

Over the most recent week on record, 5 reservoirs rose and 3 reservoirs fell across Kansas.

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

Kansas at a glance

Reservoirs tracked: 35
Average fill: 80.3%
Water stored: 6,758 hm³
Combined capacity: 8,415 hm³
At critically low levels: 2
Fullest: MILFORD LAKE NR JUNCTION CITY, KS (105.0%)
Lowest: Webster Reservoir and Dam (13.9%)
Last updated: June 11, 2026

Frequently asked questions

How full are reservoirs in Kansas right now?

As of June 11, 2026, the reservoirs tracked in Kansas that report live levels are 80.3% full overall, holding about 6,758 hm³ of water.

How many reservoirs are there in Kansas?

reservoirs.earth tracks 35 reservoirs in Kansas, with a combined storage capacity of 8,415 hm³.

Which reservoir in Kansas is the fullest?

MILFORD LAKE NR JUNCTION CITY, KS is currently the fullest reservoir in Kansas, at 105.0% of capacity.

Which reservoir in Kansas is the lowest?

Webster Reservoir and Dam is currently the lowest in Kansas, at 13.9% of capacity.

Where does the reservoir data for Kansas come from?

All storage figures for Kansas come from USGS · USACE · BOR · CDEC, an official source, last updated June 11, 2026.

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