Reservoir Storage Summary for River Basins on 2026-05-21

Definition Map for River Basins

Percent Full

Today Yesterday 2 days ago 1 week ago 1 month ago 3 months ago 6 months ago 1 year ago
2026-05-21 2026-05-20 2026-05-19 2026-05-14 2026-04-21 2026-02-21 2025-11-21 2025-05-21
Brazos 88.3 88.3 88.2 88.4 87.2 86.2 87.0 91.5
Canadian 39.3 39.4 39.4 39.6 40.3 41.4 42.2 38.3
Colorado 60.7 60.6 60.4 60.6 60.1 61.0 62.5 42.5
Cypress 97.1 97.1 96.8 97.1 96.5 94.7 95.7 99.2
Guadalupe 60.0 60.0 59.9 60.1 59.8 61.7 64.7 48.2
Lavaca 78.1 76.7 75.6 76.5 54.8 58.0 69.9 73.9
Neches 75.7 75.7 75.6 75.8 76.0 73.7 72.6 99.9
Nueces 8.5 8.5 8.3 8.4 7.8 9.1 10.6 15.9
Red 91.0 91.0 90.9 91.1 91.4 91.0 91.1 95.7
Rio Grande 26.9 26.9 26.9 27.3 27.6 28.6 26.7 23.2
Sabine 93.3 93.2 92.9 93.0 91.3 88.5 86.9 99.9
San Antonio 3.8 3.8 3.8 3.8 3.9 4.3 5.1 1.9
San Jacinto 96.4 96.5 97.5 98.0 93.4 96.5 95.6 99.6
Sulphur 88.3 88.1 87.8 88.0 85.6 85.5 83.9 100.0
Trinity 95.7 95.7 95.7 95.9 95.6 94.7 92.6 99.8
*

Percent Full is based on Conservation Storage and Conservation Capacity.

Recent Conditions

Percent Full Reservoir Storage
(acre-ft) 		Conservation Storage
(acre-ft) 		Conservation Capacity
(acre-ft)
Brazos 88.3 3,216,191 3,156,805 3,576,076
Canadian 39.3 259,169 220,755 561,066
Colorado 60.7 2,495,892 2,438,757 4,019,576
Cypress 97.1 663,507 548,738 565,174
Guadalupe 60.0 246,160 246,089 409,821
Lavaca 78.1 129,409 124,196 158,975
Neches 75.7 2,661,354 2,631,803 3,477,212
Nueces 8.5 78,747 78,468 918,882
Red 91.0 3,581,499 2,252,974 2,474,646
Rio Grande 26.9 1,068,488 945,887 3,520,940
Sabine 93.3 5,684,294 3,607,418 3,868,328
San Antonio 3.8 9,769 9,769 254,823
San Jacinto 96.4 534,045 530,217 549,895
Sulphur 88.3 499,007 352,237 399,063
Trinity 95.7 6,620,013 6,486,694 6,776,855
**

The grey areas represent coastal basins that have no contributing reservoirs present.