Lake Sulphur Springs water level today
On Oct 28, 2026, Lake Sulphur Springs is at 457.23 ft, 83.1% full (1.72 ft below full pool). That is 1.1 points below normal for this date.
Source: Texas Water Development Board · storage 14,748 of 17,747 acre-ft · provisional data
Lake Sulphur Springs percent full history
Percent full Normal range (10th–90th percentile, 1996–2025) Average
Records and key dates
- Record high
- 100.0%Apr 5, 1999
- Record low
- 47.7%Nov 12, 2011
- 12-month high
- 100.0%May 23, 2026
- 12-month low
- 75.8%Feb 12, 2026
- Last time full
- Jul 27, 2026
- Change in 1 year
- +0.40 ft+3.6 pts
About Lake Sulphur Springs
- River basin
- Sulphur
- Full pool (top of conservation pool)
- 458.95 ft
- Conservation capacity
- 17,747 acre-ft
- Surface area today
- —
- Dead pool elevation
- 0.00 ft
- Flood control reservoir
- No
- Data since
- Mar 26, 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 | 77% | 79% | 80% | 86% | 96% | 100% | 99% | 95% | 88% | 85% | — | — |
| 2025 | 100% | 98% | 100% | 90% | 98% | 99% | 92% | 87% | 84% | 80% | 78% | 78% |
| 2024 | 98% | 99% | 100% | 98% | 99% | 100% | 98% | 98% | 93% | 89% | 89% | 91% |
| 2023 | 88% | 97% | 99% | 100% | 100% | 100% | 100% | 98% | 93% | 93% | 86% | 93% |
| 2022 | 56% | 57% | 56% | 67% | 76% | 74% | 68% | 65% | 70% | 66% | 76% | 91% |
| 2021 | 100% | 100% | 95% | 93% | 100% | 97% | 91% | 82% | 73% | 66% | 61% | 57% |
| 2020 | 97% | 92% | 95% | 86% | 87% | 99% | 94% | 86% | 79% | 74% | 71% | 67% |
| 2019 | 86% | 91% | 95% | 95% | 99% | 100% | 97% | 92% | 99% | 95% | 95% | 94% |
| 2018 | 100% | 97% | 93% | 93% | 91% | 88% | 84% | 79% | 80% | 93% | 94% | 92% |
| 2017 | 82% | 83% | 84% | 95% | 89% | 97% | 100% | 100% | 99% | 96% | 93% | 95% |
Frequently asked questions
Is Lake Sulphur Springs full?
Not quite. On Oct 28, 2026 Lake Sulphur Springs was 83.1% full, 1.72 feet below its full pool elevation of 458.95 ft. It was last full on Jul 27, 2026.
What is the normal level of Lake Sulphur Springs for this time of year?
Between 1996 and 2025, Lake Sulphur Springs averaged 84.2% full around Oct 28, and 8 in 10 years it was between 66.6% and 100.0%. Today it is −1.1 percentage points below that average.
What is the lowest Lake Sulphur Springs has been?
In the TWDB record, which starts in 1999, the lowest daily value was 47.7% on Nov 12, 2011. The highest was 100.0% on Apr 5, 1999.
How often is the Lake Sulphur Springs 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 (17,747 acre-feet for Lake Sulphur Springs). Water above the conservation pool is flood storage and is not counted, so a reservoir can show 100% while rising into its flood pool.