Blue Mesa Reservoir Water Level
Colorado's largest body of water, in the Curecanti National Recreation Area on the Gunnison River. Blue Mesa was drawn down in 2021 to support Lake Powell.
USBR daily reading for Oct 23, 2026
- PERCENT FULL
- 17.1%
- 7-DAY CHANGE
- +0.3 pts
- ELEVATION
- 7,412.7 ft
- water surface, above sea level
- ACRE-FEET
- 142.1K
- of 829.5K capacity
- GALLONS
- 46.31B
- of 270.29B
Water balance, 7 days to Oct 23, 2026
- Inflow
- 12,393 af
- Reclamation's measured inflow
- Release
- 9,631 af
- Water passed downstream through the dam
- Change in storage
- +2,715 af
- From the daily storage readings; the difference from inflow minus release is evaporation, diversions and rounding
Trend
- 7 days
- +0.3 pts
- vs. the reading a week earlier
- 1 year
- −33.3 pts
- vs. end of Sep 2025 (50.4%)
- 10-year low
- 17.1%
- today; lowest month-end was 17.3% (Sep 2026)
- 10-year high
- 99.2%
- end of Jul 2019
Yearly figures and the high/low compare end-of-month storage from Reclamation's monthly series with the latest daily reading. This site does not project future levels; for official 24-month projections see Reclamation's 24-Month Study. How each figure is derived is explained in the FAQ.
10-Year Historical Trend
End-of-month storage as a percent of capacity. Source: U.S. Bureau of Reclamation. Dashed lines are this site's warning (50%) and critical (30%) marks.
About Blue Mesa Reservoir
Blue Mesa Reservoir is on the Gunnison River in CO. Reclamation's capacity figure for it is 829,500 acre-feet (live capacity), about 270.29B gallons.
Colorado's largest body of water, in the Curecanti National Recreation Area on the Gunnison River. Blue Mesa was drawn down in 2021 to support Lake Powell.
As of Oct 23, 2026, the reservoir held 142,112 acre-feet, 17.1% of capacity, up 0.3 pts from the reading seven days earlier, with the water surface at 7,412.7 feet above sea level. Storage figures are U.S. Bureau of Reclamation daily readings; recent values are provisional and may be revised.
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Every Monday: Blue Mesa Reservoir and the rest of the system, with the week's change. One email a week, unsubscribe any time.