San Angelo Area Reservoirs: Monitored Water Supply Reservoirs are 34.5% full on 2026-07-23

Historical Data

Date Percent Full Reservoir Storage
(acre-ft) 		Conservation Storage
(acre-ft) 		Conservation Capacity
(acre-ft)
Today 2026-07-23 34.5 301,394 297,151 862,151
Yesterday 2026-07-22 34.5 301,703 297,460 862,151
2 days ago 2026-07-21 34.6 302,141 297,898 862,151
1 week ago 2026-07-16 34.3 299,663 295,420 862,151
1 month ago 2026-06-23 35.8 312,497 308,254 862,151
3 months ago 2026-04-23 35.4 309,382 305,139 862,151
6 months ago 2026-01-23 35.3 308,907 304,664 862,151
1 year ago 2025-07-23 41.9 365,388 361,145 862,151
*

 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 12.8 1,874.22 -33.78 14,836 14,835 115,742 1,245
O H Ivie Water Supply 46.8 1,532.05 -19.45 259,365 259,365 554,340 - n.a. -
Twin Buttes Water Supply and Flood Control 8.0 1,900.07 -40.13 18,431 14,682 182,454 1,360