Amistad Dam · Rio Grande · Texas / Coahuila (US–Mexico) — updated daily from official gauges
Latest reading
Amistad Reservoir is 37.1% full as of — surface elevation 1,056.29 feet, storage 672,250 acre-feet (capacity basis 1,813,408 acre-feet).
That elevation is 12.68 feet above its record low of 1,043.61 ft (, the lowest since the reservoir first filled), in a daily record going back to June 1, 1968 (TWDB's period of record for this reservoir).
Storage is 51% of the July 24 average across 59 years of record.
Water level change: +6.13 ft over the past week, +8.51 ft over the past month, and +0.48 ft over the past year.
Percent full
37.1%
of 1,813,408 AF
Vs date average
51%
of the Jul 24 storage average since 1968
Elevation
1,056.29 ft
full pool 1,117.0 ft
Storage
672,250 AF
+88 KAF vs 1 yr ago
1-week change
+6.13 ft
elevation
1-year change
+0.48 ft
elevation
Amistad Reservoir vs its record low
In the daily record used by this site (going back to June 1, 1968 (TWDB's period of record for this reservoir)), Amistad Reservoir's lowest surface elevation since it first filled (first near-full reading 1972) was 1,043.61 feet on , when storage was 619,464 acre-feet. As of , Amistad Reservoir is at 1,056.29 feet — 12.68 feet above that record. The record high in the same series was 1,129.99 ft on .
Amistad Reservoir storage in context
Reading
Elevation (ft)
Storage (AF)
% full
Today (July 24, 2026)
1,056.29
672,250
37.1%
One year ago
1,055.81
584,741
32.2%
Five years ago
1,069.73
976,924
53.9%
Record low (September 29, 2023)
1,043.61
619,464
34.2%
Capacity basis
1,117.00
1,813,408
100.0%
Amistad Reservoir water level, past 12 months
Amistad Reservoir daily surface elevation (feet above sea level), past 12 months. Source: Water Data for Texas (TWDB). Rendered at build time from the official gauge record — no JavaScript.
Amistad Reservoir elevation, full record
Amistad Reservoir month-end surface elevation, 1968–2026 — the full daily record fetched from Water Data for Texas (TWDB), one point per month.
Last 14 daily readings
Date
Elevation (ft)
Day change
Storage (AF)
July 24, 2026
1,056.29
+0.24 ft
672,250
July 23, 2026
1,056.05
+0.27 ft
667,949
July 22, 2026
1,055.78
+0.33 ft
663,259
July 21, 2026
1,055.45
+0.55 ft
657,563
July 20, 2026
1,054.90
+1.47 ft
648,043
July 19, 2026
1,053.43
+2.79 ft
622,848
July 18, 2026
1,050.64
+0.48 ft
574,854
July 17, 2026
1,050.16
+0.60 ft
567,238
July 16, 2026
1,049.56
+0.59 ft
558,102
July 15, 2026
1,048.97
+0.35 ft
549,514
July 14, 2026
1,048.62
+0.32 ft
544,408
July 13, 2026
1,048.30
+0.11 ft
539,762
July 12, 2026
1,048.19
+0.07 ft
538,156
July 11, 2026
1,048.12
—
542,048
Frequently asked questions
What is the water level of Amistad Reservoir today?
As of July 24, 2026, Amistad Reservoir's surface elevation is 1,056.29 feet, with 672,250 acre-feet in storage — 37.1% of the 1,813,408 acre-foot capacity basis. Source: Water Data for Texas (TWDB) daily data.
How full is Amistad Reservoir?
Amistad Reservoir is 37.1% full as of July 24, 2026. Its storage is 51% of the July 24 average across its record since 1968.
Is Amistad Reservoir rising or falling?
Amistad Reservoir is rising: its elevation changed +6.13 feet over the week ending July 24, 2026, +8.51 ft over the past month, and +0.48 feet over the past year. Source: Water Data for Texas (TWDB) daily data.
What was Amistad Reservoir's lowest water level on record?
Amistad Reservoir's lowest surface elevation since it first filled (its first near-full reading in this series is from 1972) was 1,043.61 feet on September 29, 2023, per the daily record used by this site. As of July 24, 2026 the reservoir is 12.68 feet above that record low.
About this gauge
Amistad Reservoir on the Rio Grande near Del Rio is operated by the International Boundary and Water Commission and shared by the United States and Mexico.
Data: Texas Water Development Board (Water Data for Texas), daily water level and conservation storage for Amistad Reservoir. Percent full is conservation storage divided by conservation capacity (1,813,408 acre-feet at the latest reading), matching TWDB's own methodology. Updated daily.