San Angelo Area Reservoirs: Monitored Water Supply Reservoirs are 35.6% full on 2026-01-11

Historical Data

Date Percent Full Reservoir Storage
(acre-ft) 		Conservation Storage
(acre-ft) 		Conservation Capacity
(acre-ft)
Today 2026-01-11 35.6 311,306 307,063 862,151
Yesterday 2026-01-10 35.7 311,929 307,686 862,151
2 days ago 2026-01-09 35.7 312,288 308,045 862,151
1 week ago 2026-01-04 35.8 312,898 308,655 862,151
1 month ago 2025-12-11 36.3 317,452 313,209 862,151
3 months ago 2025-10-11 37.4 326,642 322,399 862,151
6 months ago 2025-07-11 41.7 363,467 359,224 862,151
1 year ago 2025-01-11 29.6 259,374 255,131 862,151
*

 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 86.3 1,871.78 -0.93 8,787 8,294 9,615 1,238
O C Fisher Water Supply and Flood Control 14.9 1,876.07 -31.93 17,252 17,251 115,742 1,356
O H Ivie Water Supply 46.9 1,532.10 -19.40 259,942 259,942 554,340 - n.a. -
Twin Buttes Water Supply and Flood Control 11.8 1,904.62 -35.58 25,325 21,576 182,454 1,688