San Angelo Area Reservoirs: Monitored Water Supply Reservoirs are 38.4% full on 2025-09-21

Historical Data

Date Percent Full Reservoir Storage
(acre-ft) 		Conservation Storage
(acre-ft) 		Conservation Capacity
(acre-ft)
Today 2025-09-21 38.4 335,154 330,911 862,151
Yesterday 2025-09-20 38.4 335,471 331,228 862,151
2 days ago 2025-09-19 38.5 335,919 331,676 862,151
1 week ago 2025-09-14 38.7 338,160 333,917 862,151
1 month ago 2025-08-21 40.0 349,414 345,171 862,151
3 months ago 2025-06-21 30.8 270,149 265,906 862,151
6 months ago 2025-03-21 28.8 252,633 248,390 862,151
1 year ago 2024-09-21 26.4 232,131 227,888 862,151
*

 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 85.8 1,871.74 -0.97 8,738 8,245 9,615 1,235
O C Fisher Water Supply and Flood Control 16.4 1,877.25 -30.75 18,942 18,941 115,742 1,494
O H Ivie Water Supply 50.2 1,533.67 -17.83 278,307 278,307 554,340 - n.a. -
Twin Buttes Water Supply 13.9 1,906.76 -33.44 29,148 25,399 182,454 1,910