San Angelo Area Reservoirs: Monitored Water Supply Reservoirs are 31.1% full on 2026-09-13

Historical Data

Date Percent Full Reservoir Storage
(acre-ft) 		Conservation Storage
(acre-ft) 		Conservation Capacity
(acre-ft)
Today 2026-09-13 31.1 272,633 268,390 862,151
Yesterday 2026-09-12 31.2 273,061 268,818 862,151
2 days ago 2026-09-11 31.2 273,562 269,319 862,151
1 week ago 2026-09-06 31.5 276,158 271,915 862,151
1 month ago 2026-08-13 33.1 289,342 285,099 862,151
3 months ago 2026-06-13 35.9 313,901 309,658 862,151
6 months ago 2026-03-13 34.6 302,890 298,647 862,151
1 year ago 2025-09-13 38.8 338,404 334,161 862,151
*

 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)
Nasworthy Water Supply 85.8 1,871.74 -0.97 8,738 8,245 9,615 1,235
O C Fisher Water Supply and Flood Control 11.3 1,872.74 -35.26 13,061 13,060 115,742 1,151
O H Ivie Water Supply 42.7 1,530.01 -21.49 236,872 236,872 554,340 - n.a. -
Twin Buttes Water Supply and Flood Control 5.6 1,896.47 -43.73 13,962 10,213 182,454 1,140