San Angelo Area Reservoirs: Monitored Water Supply Reservoirs are 35.6% full on 2026-05-23

Historical Data

Date Percent Full Reservoir Storage
(acre-ft) 		Conservation Storage
(acre-ft) 		Conservation Capacity
(acre-ft)
Today 2026-05-23 35.6 311,533 307,290 862,151
Yesterday 2026-05-22 35.4 309,050 304,807 862,151
2 days ago 2026-05-21 35.0 306,041 301,798 862,151
1 week ago 2026-05-16 34.9 305,441 301,198 862,151
1 month ago 2026-04-23 35.4 309,396 305,153 862,151
3 months ago 2026-02-23 34.9 304,704 300,461 862,151
6 months ago 2025-11-23 36.0 314,784 310,541 862,151
1 year ago 2025-05-23 31.2 273,101 268,858 862,151
*

 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 85.4 1,871.71 -1.00 8,701 8,208 9,615 1,233
O C Fisher Water Supply and Flood Control 14.0 1,875.30 -32.70 16,224 16,223 115,742 1,321
O H Ivie Water Supply 47.8 1,532.53 -18.97 264,903 264,903 554,340 - n.a. -
Twin Buttes Water Supply and Flood Control 9.8 1,902.35 -37.85 21,705 17,956 182,454 1,524