Reservoir Storage Summary for River Basins on 2026-09-21

Definition Map for River Basins

Percent Full

Most recent 1 day prior 2 days prior 1 week prior 1 month prior 3 months prior 6 months prior 1 year prior
2026-09-21 2026-09-20 2026-09-19 2026-09-14 2026-08-21 2026-06-21 2026-03-21 2025-09-21
Brazos 81.9 82.0 82.1 82.8 86.1 90.2 85.7 90.6
Canadian 36.2 36.2 36.2 36.4 37.2 39.7 41.1 43.1
Colorado 63.4 63.4 63.5 64.1 66.4 64.4 60.3 65.4
Cypress 86.8 88.6 88.4 87.5 89.7 94.9 94.6 97.5
Guadalupe 96.6 96.7 96.8 97.3 98.3 63.4 60.7 68.5
Lavaca 84.4 84.5 84.6 85.7 91.6 99.8 53.1 82.9
Neches 70.0 70.1 70.2 70.9 73.3 76.8 75.4 78.0
Nueces 39.8 39.8 39.9 40.2 42.7 14.7 8.3 12.5
Red 84.2 84.3 84.6 85.3 88.8 93.8 90.5 93.2
Rio Grande 30.8 30.9 30.9 31.2 32.4 28.5 27.8 27.5
Sabine 87.0 87.1 87.2 87.9 90.0 96.2 90.2 89.8
San Antonio 29.0 29.0 29.0 29.3 30.0 8.3 4.1 5.9
San Jacinto 95.5 95.5 95.6 96.0 97.0 100.0 96.0 98.8
Sulphur 80.2 80.3 80.5 81.5 85.7 92.7 84.1 90.7
Trinity 86.0 86.0 86.2 87.1 90.5 97.0 95.5 95.1
*

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 81.9 2,940,431 2,928,580 3,576,076
Canadian 36.2 241,252 202,838 561,066
Colorado 63.4 2,604,611 2,547,476 4,019,576
Cypress 86.8 602,827 504,410 581,315
Guadalupe 96.6 395,766 395,695 409,821
Lavaca 84.4 139,415 134,202 158,975
Neches 70.0 2,461,789 2,432,513 3,477,212
Nueces 39.8 365,601 365,322 918,882
Red 84.2 3,272,158 2,083,745 2,474,646
Rio Grande 30.8 1,280,691 1,085,386 3,520,940
Sabine 87.0 5,348,420 3,366,254 3,868,328
San Antonio 29.0 73,834 73,834 254,823
San Jacinto 95.5 528,935 525,107 549,895
Sulphur 80.2 480,047 319,918 399,063
Trinity 86.0 5,902,188 5,824,999 6,776,855
**

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