Rio-Grande River Basin Reservoirs: Monitored Water Supply Reservoirs are 32.9% full on 2026-07-21
Historical Data
| Date | Percent Full |
Reservoir Storage (acre-ft) |
Conservation Storage (acre-ft) |
Conservation Capacity (acre-ft) |
|
|---|---|---|---|---|---|
| Today | 2026-07-21 | 32.9 | 1,392,200 | 1,157,289 | 3,520,940 |
| Yesterday | 2026-07-20 | 32.0 | 1,355,261 | 1,128,231 | 3,520,940 |
| 2 days ago | 2026-07-19 | 30.6 | 1,290,814 | 1,076,090 | 3,520,940 |
| 1 week ago | 2026-07-14 | 28.1 | 1,189,220 | 989,394 | 3,520,940 |
| 1 month ago | 2026-06-21 | 28.5 | 1,201,854 | 1,003,567 | 3,520,940 |
| 3 months ago | 2026-04-21 | 27.6 | 1,081,986 | 970,678 | 3,520,940 |
| 6 months ago | 2026-01-21 | 28.6 | 1,116,914 | 1,007,451 | 3,520,940 |
| 1 year ago | 2025-07-21 | 25.9 | 1,156,225 | 912,301 | 3,520,940 |
Percent Full is based on Conservation Storage and Conservation Capacity and doesn't account for storage in flood pool.
Area Map
Reservoir Storage
| Reservoir | Type | Percent Full |
Water Level (ft) |
Height Above Conservation Pool (ft) |
Reservoir Storage (acre-ft) |
Conservation Storage (acre-ft) |
Conservation Capacity (acre-ft) |
Surface Area (acres) |
|---|---|---|---|---|---|---|---|---|
| Amistad 1 |
|
36.0 | 1,055.34 | -61.66 | 750,868 | 652,660 | 1,813,408 | 20,156 |
| Falcon 1 |
|
27.8 | 264.91 | -36.29 | 571,035 | 434,332 | 1,562,367 | 32,191 |
| Red Bluff |
|
48.4 | 2,815.60 | -12.50 | 70,297 | 70,297 | 145,165 | 4,700 |
Lake Amistad and Lake Falcon straddle the border of Texas and Mexico. By treaty, Texas has rights to 56.2% of the total conservation capacity of Amistad and 58.6% of the total conservation capacity of Falcon. The fraction of the actual storage that belongs to Texas is formally determined biweekly by the International Boundary Water Commission (IBWC). The IBWC is the legal repository of data related to this lake for treaty purposes and official versions of the datasets should be obtained directly from them. Conservation capacity is based on the fixed percent of total conservation capacity. Conservation storage is based on the bi-weekly changing Texas share.