Reservoir · Texas · United States · TWDB
Lake L. B. Johnson
98.9% full
Capacity
139.11 hm³
Volume stored
138 hm³
Vs month average
101% of normal
Coordinates
30.556°N, 98.338°W
Last updated
2026-10-14
Current fill
98.9%vs 7 days ago
+0.7%gaining
vs 1 year ago
+0.7%year-over-year
7-day trend
→stable
Drought context
Storage vs October average
101%of normal
98.9% full on 2026-10-14, against an average of 98.3% for October across 5 years of readings (+0.6 points).
Data source: Texas Water Development Board (Water Data for Texas) — daily reservoir storage volume. Design capacity is unavailable for this site, so fill % is estimated against the 5-year maximum storage and may overstate fullness. Last reading: 2026-10-14.
Catchment Weather
Past 30 days + 14-day forecast · Open-Meteo
About Lake L. B. Johnson
As of October 14, 2026, Lake L. B. Johnson is filled to 98.9% of its total capacity, holding roughly 138 hm³ of water out of a maximum 139 hm³. At this level the reservoir is high.
Over the most recent week on record the fill level has held broadly steady (+0.7 pts), and it sits close to where it was a year earlier.
Across the readings we hold for Lake L. B. Johnson — 1461 data points between October 15, 2022 and October 14, 2026 — the level has ranged from a low of 92.9% (July 17, 2026) to a high of 99.4% (April 24, 2026). On average the reservoir is fullest around August and at its lowest around July.
It is operated by TWDB primarily for multiple purposes. It lies within the Texas basin at 30.556°N, 98.338°W.
Key facts
- Current fill level
- 98.9%
- Water stored
- 138 hm³
- Total capacity
- 139 hm³
- 7-day change
- ▲ 0.7 pts
- Year-on-year
- ▲ 0.7 pts
- Primary use
- Multipurpose
- River basin
- Texas
- Operator
- TWDB
- Coordinates
- 30.556°N, 98.338°W
- Last updated
- October 14, 2026
Recent readings
| Date | Fill level | Volume (hm³) |
|---|---|---|
| 14 Oct 2026 | 98.9% | 138 |
| 13 Oct 2026 | 98.5% | 137 |
| 12 Oct 2026 | 98.7% | 137 |
| 11 Oct 2026 | 98.2% | 137 |
| 10 Oct 2026 | 98.4% | 137 |
| 9 Oct 2026 | 98.5% | 137 |
| 8 Oct 2026 | 98.2% | 137 |
| 7 Oct 2026 | 98.2% | 137 |
| 6 Oct 2026 | 98.6% | 137 |
| 5 Oct 2026 | 98.5% | 137 |
| 4 Oct 2026 | 96.5% | 134 |
| 3 Oct 2026 | 95.2% | 132 |