San Angelo Area Reservoirs: Monitored Water Supply Reservoirs are 34.1% full on 2026-03-31

Historical Data

Date Percent Full Reservoir Storage
(acre-ft) 		Conservation Storage
(acre-ft) 		Conservation Capacity
(acre-ft)
Today 2026-03-31 34.1 298,091 293,848 862,151
Yesterday 2026-03-30 34.1 298,296 294,053 862,151
2 days ago 2026-03-29 34.1 298,500 294,257 862,151
1 week ago 2026-03-24 34.3 299,704 295,461 862,151
1 month ago 2026-02-28 34.7 303,498 299,255 862,151
3 months ago 2025-12-31 35.9 313,735 309,492 862,151
6 months ago 2025-09-30 38.0 331,544 327,301 862,151
1 year ago 2025-03-31 28.6 251,141 246,898 862,151
*

 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 86.0 1,871.76 -0.95 8,762 8,269 9,615 1,236
O C Fisher Water Supply and Flood Control 14.2 1,875.44 -32.56 16,410 16,409 115,742 1,327
O H Ivie Water Supply 45.1 1,531.21 -20.29 249,955 249,955 554,340 - n.a. -
Twin Buttes Water Supply and Flood Control 10.5 1,903.17 -37.03 22,964 19,215 182,454 1,583