Illinois Lake Levels Today
Water levels and percent full for 3 Illinois lakes and reservoirs, updated every day from the US Army Corps of Engineers.
Updated Nov 7, 2026 · Source: US Army Corps of EngineersUSACE
- 3lakes tracked
- 0at or above full pool
- 0rising this week
- 3falling this week
All Illinois lakes
| Carlyle Lake | 444.77 | 445.0 | −0.23 | — | −0.12 | 444.13 ft | Nov 7, 8:30 PM CST |
|---|---|---|---|---|---|---|---|
| Lake Shelbyville | 599.18 | 599.7 | −0.52 | — | −0.11 | 597.15 ft | Nov 7, 8:30 PM CST |
| Rend Lake | 403.23 | 405.0 | −1.77 | — | −0.19 | 404.21 ft | Nov 7, 8:30 PM CST |
3 lakes · “1 yr ago” is % full when the source gives it, otherwise the level
Illinois lakes on the map
River chains
Kaskaskia River chain
UpstreamKaskaskia RiverDownstream
Illinois operators
Neighboring states
Quick answers
What does “percent full” mean for a reservoir?
It is the water stored in the conservation pool divided by the capacity of that pool. Water above full pool is flood storage and does not count, so a lake can be “100% full” and still rising. See Full pool and ft msl.
Where does this data come from?
From US Army Corps of Engineers. Each lake page names its gauge and the time of the reading. See Sources.
Where this data comes from
Official gauges: US Army Corps of Engineers. Sources
Lake Levels Daily is an independent site, not affiliated with TWDB, LCRA, USACE, USGS, NOAA, TVA or any lake operator. Check official sources before making safety decisions.