Mackenzie Reservoir water level today
On Oct 28, 2026, Mackenzie Reservoir is at 3,018.34 ft, 10.8% full (81.66 ft below full pool). That is 1.4 points below normal for this date.
Lowest since May 2025Very low
Source: Texas Water Development Board · storage 5,017 of 46,450 acre-ft · provisional data
Mackenzie Reservoir percent full history
Percent full Normal range (10th–90th percentile, 1996–2025) Average
Mackenzie Reservoir from space
The same area near the lowest and the highest level since 2016, on clear days. Compare the shoreline and the coves.
Imagery: NASA GIBS, Harmonized Landsat Sentinel-2 (HLS). Landsat 8/9 courtesy of NASA/USGS; contains modified Copernicus Sentinel data 2023. Black specks are cloud and shadow masks.
Records and key dates
- Record high
- 21.5%May 29, 1999
- Record low
- 4.7%May 21, 2014
- 12-month high
- 13.0%Oct 29, 2025
- 12-month low
- 10.8%Oct 11, 2026
- Last time full
- Not in the record
- Change in 1 year
- −4.44 ft−2.2 pts
About Mackenzie Reservoir
- River basin
- Red
- Full pool (top of conservation pool)
- 3,100.00 ft
- Conservation capacity
- 46,450 acre-ft
- Surface area today
- 234 acres
- Dead pool elevation
- 0.00 ft
- Flood control reservoir
- No
- Data since
- Apr 17, 1999
Monthly average, last 10 years
Average percent full each month.
| Year | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2026 | 13% | 13% | 12% | 12% | 12% | 12% | 12% | 11% | 11% | 11% | — | — |
| 2025 | 9% | 9% | 9% | 9% | 11% | 13% | 14% | 14% | 13% | 13% | 13% | 13% |
| 2024 | 9% | 9% | 9% | 9% | 9% | 9% | 9% | 9% | 9% | 8% | 9% | 9% |
| 2023 | 6% | 6% | 6% | 6% | 6% | 11% | 11% | 10% | 10% | 10% | 9% | 9% |
| 2022 | 8% | 8% | 7% | 7% | 7% | 7% | 7% | 7% | 7% | 6% | 6% | 6% |
| 2021 | 9% | 9% | 9% | 9% | 9% | 8% | 9% | 8% | 8% | 8% | 8% | 8% |
| 2020 | 11% | 11% | 11% | 11% | 11% | 11% | 10% | 10% | 10% | 9% | 9% | 9% |
| 2019 | 12% | 12% | 12% | 12% | 12% | 12% | 12% | 12% | 12% | 12% | 12% | 11% |
| 2018 | 15% | 15% | 14% | 14% | 14% | 14% | 13% | 13% | 13% | 13% | 13% | 13% |
| 2017 | 15% | 15% | 15% | 15% | 15% | 15% | 15% | 15% | 15% | 15% | 15% | 15% |
Frequently asked questions
Is Mackenzie Reservoir full?
Not quite. On Oct 28, 2026 Mackenzie Reservoir was 10.8% full, 81.66 feet below its full pool elevation of 3,100.00 ft.
What is the normal level of Mackenzie Reservoir for this time of year?
Between 1996 and 2025, Mackenzie Reservoir averaged 12.2% full around Oct 28, and 8 in 10 years it was between 6.9% and 16.4%. Today it is −1.4 percentage points below that average.
What is the lowest Mackenzie Reservoir has been?
In the TWDB record, which starts in 1999, the lowest daily value was 4.7% on May 21, 2014. The highest was 21.5% on May 29, 1999.
How often is the Mackenzie Reservoir water level updated?
TWDB publishes one reading per day for each reservoir. We check for new data every 2 hours and show the date of the reading next to the level. Recent values are provisional.
What does percent full mean?
It is the water stored in the conservation pool divided by the conservation capacity (46,450 acre-feet for Mackenzie Reservoir). Water above the conservation pool is flood storage and is not counted, so a reservoir can show 100% while rising into its flood pool.