LakeLevelIs American Falls Reservoir low right now?
American Falls Reservoir was at 4,309.36 ft on October 9, 2026. That is 9.92 ft below the typical level for October 9, within the normal range. Over the past week the lake has been steady.
American Falls Reservoir on Oct 9 in past years
20254,308.2+1.2
20244,319.5−10.1
20234,321.1−11.8
20224,307.9+1.5
20214,313.9−4.6
20204,323.9−14.5
Daily levels, last two weeks
| Date | Level (ft) | Change |
|---|---|---|
| Oct 9 | 4,309.36 | +0.12 |
| Oct 8 | 4,309.24 | +0.06 |
| Oct 7 | 4,309.18 | −0.05 |
| Oct 6 | 4,309.23 | −0.05 |
| Oct 5 | 4,309.28 | −0.08 |
| Oct 4 | 4,309.36 | −0.05 |
| Oct 3 | 4,309.41 | −0.02 |
| Oct 2 | 4,309.43 | −0.08 |
| Oct 1 | 4,309.51 | −0.05 |
| Sep 30 | 4,309.56 | +0.06 |
| Sep 29 | 4,309.50 | +0.28 |
| Sep 28 | 4,309.22 | +0.39 |
| Sep 27 | 4,308.83 | +0.17 |
| Sep 26 | 4,308.66 | +0.52 |
About American Falls Reservoir
- 10-year range
- 4,306.5 ft (October 1, 2025) to 4,354.8 ft (May 29, 2019)
- Operated by
- U.S. Bureau of Reclamation
- Data
- U.S. Bureau of Reclamation — American Falls Reservoir and Dam (AMF)
- Datum
- NAVD88
Lakes near American Falls Reservoir
- Lake WalcottIdaho · 32 mi 4,237.3 ft −0.4 wkLower than usual for this time of year
- Snake R@Milner LakeIdaho · 60 mi 10.2 ft −0.8 wkLower than usual for this time of year
- Little Wood ReservoirIdaho · 73 mi 5,178.6 ft −1.0 wkNormal for this time of year
- Ririe LakeIdaho · 80 mi 5,063.2 ft −0.5 wkLower than usual for this time of year
- Mud LakeIdaho · 81 mi 4,780.9 ft −0.1 wkNormal for this time of year
- MACKAY ReservoirIdaho · 90 mi 6,024.4 ft −2.2 wkNormal for this time of year
Questions
Is American Falls Reservoir low right now?
American Falls Reservoir was at 4,309.36 ft on October 9, 2026. That is 9.92 ft below the typical level for October 9, within the normal range. Over the past week the lake has been steady.
How often is the American Falls Reservoir level updated?
The operator reports once a day, a day or two behind. This page refreshes several times a day; the time of the latest reading is shown next to the level.
Where does this data come from?
U.S. Bureau of Reclamation (American Falls Reservoir and Dam (AMF)). Readings are provisional and can be revised.