San Angelo Area Reservoirs: Monitored Water Supply Reservoirs are 30.6% full on 2026-09-23

Historical Data

Date Percent Full Reservoir Storage
(acre-ft) 		Conservation Storage
(acre-ft) 		Conservation Capacity
(acre-ft)
Today 2026-09-23 30.6 268,005 263,762 862,151
Yesterday 2026-09-22 30.6 268,282 264,039 862,151
2 days ago 2026-09-21 30.7 268,675 264,432 862,151
1 week ago 2026-09-16 30.9 270,844 266,601 862,151
1 month ago 2026-08-23 32.4 283,275 279,032 862,151
3 months ago 2026-06-23 35.8 312,497 308,254 862,151
6 months ago 2026-03-23 34.3 299,944 295,701 862,151
1 year ago 2025-09-23 38.2 333,486 329,243 862,151
*

 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 85.6 1,871.73 -0.98 8,726 8,233 9,615 1,234
O C Fisher Water Supply and Flood Control 11.0 1,872.45 -35.55 12,735 12,734 115,742 1,118
O H Ivie Water Supply 42.1 1,529.67 -21.83 233,297 233,297 554,340 - n.a. -
Twin Buttes Water Supply and Flood Control 5.2 1,895.83 -44.37 13,247 9,498 182,454 1,101