LakeLevelAbout LakeLevel & data sources
LakeLevel collects water-surface elevations that lake operators already publish and puts them in context: full pool, the trend, and what is normal for the date.
Sources
- U.S. Army Corps of Engineers — 541 lakes
- U.S. Geological Survey — 379 lakes
- U.S. Bureau of Reclamation — 109 lakes
- California Data Exchange Center (DWR) — 53 lakes
- Tennessee Valley Authority — 33 lakes
- NOAA Tides & Currents (Great Lakes) — 6 lakes
- Texas Water Development Board — 5 lakes
- Appalachian Power (AEP) — 2 lakes
How the numbers are made
- Latest reading is the most recent value the operator published, usually hourly or daily.
- Daily levels are the mean of that day's readings.
- Normal for the date is the median of the same calendar day over the previous ten years; the normal range is the 10th–90th percentile.
- Full pool comes from the operator's published conservation or normal pool elevation.
Readings are provisional and can be revised by the agency. Do not use this site for navigation or flood safety decisions — follow the operator's notices.
Questions or a lake we should add? hello@lakelevel.app