Twin Buttes Reservoir water level today
On Oct 28, 2026, Twin Buttes Reservoir is at 1,894.15 ft, 4.2% full (46.05 ft below full pool). That is 14.1 points below normal for this date.
Lowest since September 2018Very low
Source: Texas Water Development Board · storage 7,730 of 182,454 acre-ft · provisional data
Twin Buttes Reservoir percent full history
Percent full Normal range (10th–90th percentile, 1996–2025) Average
Twin Buttes 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 2018, 2019. Black specks are cloud and shadow masks.
Records and key dates
- Record high
- 75.6%Jun 18, 2019
- Record low
- 0.0%Oct 9, 2000
- 12-month high
- 12.6%Oct 29, 2025
- 12-month low
- 4.2%Oct 28, 2026
- Last time full
- Not in the record
- Change in 1 year
- −11.37 ft−8.5 pts
About Twin Buttes Reservoir
- River basin
- Colorado
- Full pool (top of conservation pool)
- 1,940.20 ft
- Conservation capacity
- 182,454 acre-ft
- Surface area today
- 1,018 acres
- Dead pool elevation
- 1,885.00 ft
- Flood control reservoir
- Yes
- Water supply for
- San Angelo
- Data since
- Oct 1, 2000
Monthly average, last 10 years
Average percent full each month.
| Year | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2026 | 12% | 12% | 11% | 10% | 10% | 9% | 8% | 7% | 5% | 5% | — | — |
| 2025 | 9% | 9% | 8% | 9% | 14% | 14% | 15% | 15% | 14% | 13% | 12% | 12% |
| 2024 | 15% | 15% | 15% | 14% | 13% | 12% | 11% | 9% | 10% | 9% | 9% | 9% |
| 2023 | 29% | 29% | 28% | 28% | 27% | 27% | 24% | 20% | 18% | 17% | 16% | 16% |
| 2022 | 52% | 51% | 51% | 50% | 47% | 43% | 38% | 33% | 31% | 30% | 29% | 29% |
| 2021 | 54% | 54% | 54% | 53% | 52% | 51% | 51% | 52% | 54% | 53% | 53% | 52% |
| 2020 | 64% | 65% | 67% | 68% | 67% | 65% | 62% | 56% | 55% | 55% | 54% | 53% |
| 2019 | 59% | 62% | 65% | 67% | 72% | 75% | 74% | 70% | 66% | 63% | 62% | 63% |
| 2018 | 7% | 7% | 7% | 6% | 6% | 6% | 4% | 3% | 5% | 25% | 48% | 54% |
| 2017 | 12% | 13% | 14% | 14% | 13% | 12% | 11% | 10% | 8% | 8% | 7% | 7% |
Frequently asked questions
Is Twin Buttes Reservoir full?
Not quite. On Oct 28, 2026 Twin Buttes Reservoir was 4.2% full, 46.05 feet below its full pool elevation of 1,940.20 ft.
What is the normal level of Twin Buttes Reservoir for this time of year?
Between 1996 and 2025, Twin Buttes Reservoir averaged 18.3% full around Oct 28, and 8 in 10 years it was between 0.7% and 53.5%. Today it is −14.1 percentage points below that average.
What is the lowest Twin Buttes Reservoir has been?
In the TWDB record, which starts in 2000, the lowest daily value was 0.0% on Oct 9, 2000. The highest was 75.6% on Jun 18, 2019.
How often is the Twin Buttes 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 (182,454 acre-feet for Twin Buttes 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.