Brownsville Area Reservoirs: Monitored Water Supply Reservoirs are 26.2% full on 2026-05-08

Historical Data

Date Percent Full Reservoir Storage
(acre-ft) 		Conservation Storage
(acre-ft) 		Conservation Capacity
(acre-ft)
Most recent 2026-05-08 26.2 1,000,426 883,715 3,375,775
1 day prior 2026-05-07 26.2 1,000,406 883,704 3,375,775
2 days prior 2026-05-06 26.2 999,906 883,275 3,375,775
1 week prior 2026-05-01 26.4 1,003,667 889,721 3,375,775
1 month prior 2026-04-08 25.3 958,281 855,661 3,375,775
3 months prior 2026-02-08 27.6 1,036,226 930,819 3,375,775
6 months prior 2025-11-08 26.3 1,061,582 886,566 3,375,775
1 year prior 2025-05-08 22.4 931,459 756,590 3,375,775
*

 Percent Full is based on Conservation Storage and Conservation Capacity and doesn't account for storage in flood pool.

Area Map

recent reservoir storage 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 1as of 2026-05-08 Water Supply and Flood Control 30.3 1,047.87 -69.13 613,813 548,886 1,813,408 16,579
Falcon 1as of 2026-05-08 Water Supply and Flood Control 21.4 258.47 -42.73 386,613 334,829 1,562,367 24,787
footnotes
1

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.