San Angelo Area Reservoirs: Monitored Water Supply Reservoirs are 36.2% full on 2025-12-15

Historical Data

Date Percent Full Reservoir Storage
(acre-ft) 		Conservation Storage
(acre-ft) 		Conservation Capacity
(acre-ft)
Today 2025-12-15 36.2 316,559 312,316 862,151
Yesterday 2025-12-14 36.3 316,919 312,676 862,151
2 days ago 2025-12-13 36.3 317,250 313,007 862,151
1 week ago 2025-12-08 36.4 318,087 313,844 862,151
1 month ago 2025-11-15 35.9 313,498 309,255 862,151
3 months ago 2025-09-15 38.6 337,314 333,071 862,151
6 months ago 2025-06-15 31.2 273,184 268,941 862,151
1 year ago 2024-12-15 30.1 263,500 259,257 862,151
*

 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 86.4 1,871.79 -0.92 8,799 8,306 9,615 1,239
O C Fisher Water Supply and Flood Control 15.2 1,876.31 -31.69 17,590 17,589 115,742 1,385
O H Ivie Water Supply 47.7 1,532.48 -19.02 264,326 264,326 554,340 - n.a. -
Twin Buttes Water Supply and Flood Control 12.1 1,904.93 -35.27 25,844 22,095 182,454 1,710