San Angelo Area Reservoirs: Monitored Water Supply Reservoirs are 35.0% full on 2026-05-15

Historical Data

Date Percent Full Reservoir Storage
(acre-ft) 		Conservation Storage
(acre-ft) 		Conservation Capacity
(acre-ft)
Today 2026-05-15 35.0 305,877 301,634 862,151
Yesterday 2026-05-14 35.0 306,205 301,962 862,151
2 days ago 2026-05-13 35.1 306,496 302,253 862,151
1 week ago 2026-05-08 35.1 306,446 302,203 862,151
1 month ago 2026-04-15 35.2 307,985 303,742 862,151
3 months ago 2026-02-15 35.1 306,605 302,362 862,151
6 months ago 2025-11-15 35.9 313,959 309,716 862,151
1 year ago 2025-05-15 31.4 275,032 270,789 862,151
*

 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 14.1 1,875.33 -32.67 16,264 16,263 115,742 1,323
O H Ivie Water Supply 46.7 1,532.01 -19.49 258,903 258,903 554,340 - n.a. -
Twin Buttes Water Supply and Flood Control 10.0 1,902.51 -37.69 21,948 18,199 182,454 1,536