San Angelo Area Reservoirs: Monitored Water Supply Reservoirs are 33.1% full on 2026-08-13

Historical Data

Date Percent Full Reservoir Storage
(acre-ft) 		Conservation Storage
(acre-ft) 		Conservation Capacity
(acre-ft)
Today 2026-08-13 33.1 289,603 285,360 862,151
Yesterday 2026-08-12 33.1 289,937 285,694 862,151
2 days ago 2026-08-11 33.2 290,633 286,390 862,151
1 week ago 2026-08-06 33.6 293,513 289,270 862,151
1 month ago 2026-07-13 34.3 299,780 295,537 862,151
3 months ago 2026-05-13 35.1 306,482 302,239 862,151
6 months ago 2026-02-13 35.0 305,904 301,661 862,151
1 year ago 2025-08-13 40.5 353,533 349,290 862,151
*

 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 12.1 1,873.59 -34.41 14,063 14,062 115,742 1,208
O H Ivie Water Supply 45.1 1,531.23 -20.27 250,179 250,179 554,340 - n.a. -
Twin Buttes Water Supply and Flood Control 7.1 1,898.72 -41.48 16,660 12,911 182,454 1,277