San Angelo Area Reservoirs: Monitored Water Supply Reservoirs are 34.7% full on 2026-04-13

Historical Data

Date Percent Full Reservoir Storage
(acre-ft) 		Conservation Storage
(acre-ft) 		Conservation Capacity
(acre-ft)
Today 2026-04-13 34.7 303,618 299,375 862,151
Yesterday 2026-04-12 34.2 299,432 295,189 862,151
2 days ago 2026-04-11 33.9 296,814 292,571 862,151
1 week ago 2026-04-06 34.1 298,086 293,843 862,151
1 month ago 2026-03-13 34.6 302,890 298,647 862,151
3 months ago 2026-01-13 35.6 310,986 306,743 862,151
6 months ago 2025-10-13 37.3 325,727 321,484 862,151
1 year ago 2025-04-13 28.5 249,698 245,455 862,151
*

 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 88.6 1,871.96 -0.75 9,012 8,519 9,615 1,251
O C Fisher Water Supply and Flood Control 14.2 1,875.48 -32.52 16,463 16,462 115,742 1,328
O H Ivie Water Supply 46.1 1,531.70 -19.80 255,434 255,434 554,340 - n.a. -
Twin Buttes Water Supply and Flood Control 10.4 1,903.01 -37.19 22,709 18,960 182,454 1,572