Plateau Planning Region Reservoirs: Monitored Water Supply Reservoirs are 35.5% full on 2025-09-26

Historical Data

Date Percent Full Reservoir Storage
(acre-ft)
Conservation Storage
(acre-ft)
Conservation Capacity
(acre-ft)
Most recent 2025-09-26 35.5 796,198 644,613 1,813,408
1 day prior 2025-09-25 35.6 796,487 644,847 1,813,408
2 days prior 2025-09-24 35.6 796,599 644,937 1,813,408
1 week prior 2025-09-19 35.7 796,079 647,331 1,813,408
1 month prior 2025-08-26 33.7 766,013 610,642 1,813,408
3 months prior 2025-06-26 29.1 650,079 527,848 1,813,408
6 months prior 2025-03-26 25.8 663,720 468,763 1,813,408
1 year prior 2024-09-26 27.0 676,134 490,262 1,813,408
*

 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 1as of 2025-09-26 Water Supply and Flood Control 35.5 1,057.53 -59.47 796,198 644,613 1,813,408 21,277
footnotes
1

Lake Amistad straddles the border of Texas and Mexico. By treaty, Texas has rights 56.2% of the total conservation capacity. 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 56.2% of total conservation capacity. Conservation storage is based on the bi-weekly changing Texas fraction.