South Climate Division Reservoirs: Monitored Water Supply Reservoirs are 14.5% full on 2025-09-21

Historical Data

Date Percent Full Reservoir Storage
(acre-ft)
Conservation Storage
(acre-ft)
Conservation Capacity
(acre-ft)
Today 2025-09-21 14.5 406,188 360,329 2,481,249
Yesterday 2025-09-20 14.5 406,326 360,488 2,481,249
2 days ago 2025-09-19 14.5 406,303 360,522 2,481,249
1 week ago 2025-09-14 14.7 411,236 364,908 2,481,249
1 month ago 2025-08-21 14.8 424,920 368,110 2,481,249
3 months ago 2025-06-21 15.5 456,235 385,689 2,481,249
6 months ago 2025-03-21 15.7 465,172 389,204 2,481,249
1 year ago 2024-09-21 17.7 547,405 439,773 2,481,249
*

 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)
Choke Canyon Water Supply 11.4 182.95 -37.55 75,427 75,426 662,820 6,942
Corpus Christi Water Supply 15.6 78.01 -15.99 40,228 39,950 256,062 6,710
Falcon 1 Water Supply 15.7 254.18 -47.02 290,603 245,012 1,562,367 20,002
footnotes
1

Lake Falcon straddles the border of Texas and Mexico. By treaty, Texas has rights 58.6% 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 58.6% of total conservation capacity. Conservation storage is based on the bi-weekly changing Texas share.