Amistad Reservoir Water Level Today - 1,062.62 ft, 47.0% Full

Amistad Dam · Rio Grande · Texas / Coahuila (US–Mexico) - updated daily from official gauges

Western Reservoir Conditions·Daily·No. 91·Thursday, October 22, 2026·Latest reading October 22, 2026

• Amistad Reservoir is 47.0% full - low on this site's capacity scale - as of October 22, 2026. Surface elevation 1,062.62 feet, storage 852,218 acre-feet (capacity basis 1,813,408 acre-feet), per Texas Water Development Board data.
• That elevation is its highest October reading since 2023, and 19.01 feet above its record low of 1,043.61 ft (September 29, 2023, 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 62% of the October 22 average across 59 years of record.
• Amistad Reservoir is rising: elevation changed +2.75 ft over the past week, +6.29 ft over the past month, and +5.28 ft over the past year, per Texas Water Development Board data.

Amistad Reservoir has risen 5.28 feet in twelve months, to 62% of its October 22 storage average.

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 September 29, 2023, when storage was 619,464 acre-feet. As of October 22, 2026, Amistad Reservoir is at 1,062.62 feet - 19.01 feet above that record. The record high in the same series was 1,129.99 ft on October 28, 1974.

Amistad Reservoir storage in context

Amistad Reservoir water level, past 12 months

47.0% full at the latest reading - across the past 12 months it ranged from 29.2% (June 14, 2026) to 47.0% (October 22, 2026). Percent full is storage against the 1,813,408-acre-foot capacity basis, not a share of the elevation plotted above.

Amistad Reservoir elevation, full record

47.0% full at the latest reading - across the storage record since June 1, 1968 it ranged from 0.1% (June 1, 1968) to 101.5% (April 12, 2011). Percent full is storage against the 1,813,408-acre-foot capacity basis, not a share of the elevation plotted above. Every percentage here is measured against today's capacity basis; a reservoir's surveyed capacity changes as sediment accumulates behind the dam, so early-record percentages are indicative rather than exact.

Last 14 daily readings

Frequently asked questions

What is the water level of Amistad Reservoir today?

As of October 22, 2026, Amistad Reservoir's surface elevation is 1,062.62 feet, with 852,218 acre-feet in storage - 47.0% 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 47.0% full as of October 22, 2026. Its storage is 62% of the October 22 average across its record since 1968. Source: Water Data for Texas (TWDB) daily data.

When was Amistad Reservoir last full?

Amistad Reservoir was last at or above 95% of its 1,813,408 acre-foot capacity basis on June 16, 2011. As of October 22, 2026 it is 47.0% full. Source: Water Data for Texas (TWDB) daily data.

Is Amistad Reservoir rising or falling?

Amistad Reservoir is rising: its elevation changed +2.75 feet over the week ending October 22, 2026, +6.29 ft over the past month, and +5.28 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 October 22, 2026 the reservoir is 19.01 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.

Operator

Texas Water Development Board (Water Data for Texas)

Station

amistad

Measurements

Daily water level and conservation storage

Dam

Amistad Dam

River

Rio Grande

State

Texas / Coahuila (US–Mexico)

Coordinates

29.4502, -101.0587 (USGS NWIS site 08450700 (NAD83))

Full pool reference

1,117.0 ft

Capacity basis

1,813,408 acre-feet (Water Data for Texas (TWDB) conservation capacity)

Period of record

June 1, 1968 (TWDB's period of record for this reservoir)

Status

Provisional - subject to revision by the reporting agency

Update cadence

Daily

TWDB reports conservation storage against a conservation capacity that is restated as new volumetric surveys are completed, so a percent-full figure here can change without the water level changing. TWDB's methodology page is linked in the notes below.

Download the daily CSV (date, elevation ft, storage AF) or see all data downloads.

Other reservoirs tracked

Texas & Rio Grande: Lake Travis, Lake Buchanan, Canyon Lake, Falcon Lake, Elephant Butte Reservoir, Lake Abilene, Lake Alan Henry, Lake Amon G Carter, Aquilla Lake, Lake Arlington, Lake Arrowhead, Lake Athens, Lake Austin, B. A. Steinhagen Lake, Bardwell Lake, Belton Lake, Benbrook Lake, Lake Bob Sandlin, Bois d'Arc Lake, Lake Bonham, Brady Creek Reservoir, Bridgeport Reservoir, Lake Brownwood, Caddo Lake, Cedar Creek Reservoir, Champion Creek Reservoir, Lake Cherokee, Choke Canyon Reservoir, Lake Cisco, Lake Coleman, Coleto Creek Reservoir, Lake Colorado City, Comanche Creek Reservoir, Lake Conroe, Lake Corpus Christi, Lake Crook, Lake Cypress Springs, E. V. Spence Reservoir, Eagle Mountain Reservoir, Lake Fork Reservoir, Fort Phantom Hill Reservoir, Lake Georgetown, Gibbons Creek Reservoir, Lake Graham, Lake Granbury, Granger Lake, Grapevine Lake, Greenbelt Lake, Halbert Lake, Hords Creek Lake, Lake Houston, Houston County Lake, Hubbard Creek Reservoir, Moss Lake, Inks Lake, Lake J.B. Thomas, Lake Jacksonville, Cooper (Chapman) Lake, Joe Pool Lake, Lake Kemp, Lake Kickapoo, Lake O the Pines, Lavon Lake, Leon Reservoir, Lewisville Lake, Lake Limestone, Livingston Reservoir, Lost Creek Reservoir, Lake L. B. Johnson, Mackenzie Reservoir, Lake Marble Falls, Martin Lake, Medina Lake, Lake Meredith, Millers Creek Reservoir, Lake Mineral Wells, Monticello Reservoir, Mountain Creek Lake, Murvaul Lake, Lake Nacogdoches, Lake Nasworthy, Navarro Mills Lake, New Terrell City Lake, Lake Nocona (Farmer's Creek), North Fork Buffalo Creek Reservoir, O. C. Fisher Lake, O. H. Ivie Reservoir, Oak Creek Reservoir, Lake Palestine, Palo Duro Reservoir, Lake Palo Pinto, Lake Pat Cleburne, Pat Mayse Lake, Possum Kingdom Lake, Proctor Lake, Lake Ray Hubbard, Ray Roberts Lake, Red Bluff Reservoir, Richland-Chambers Reservoir, Sam Rayburn Reservoir, Somerville Lake, Lake Stamford, Stillhouse Hollow Lake, Lake Striker, Lake Sulphur Springs, Lake Sweetwater, Lake Tawakoni, Lake Texana, Lake Texoma, Toledo Bend Reservoir, Twin Buttes Reservoir, Lake Tyler, Waco Lake, Lake Waxahachie, Lake Weatherford, White River Reservoir, Whitney Lake, Lake Worth, Wright Patman Lake.
Also: Lake Mead, Lake Powell, Lake Mohave, Lake Havasu, Flaming Gorge Reservoir, Blue Mesa Reservoir, Navajo Reservoir, Shasta Lake, Lake Oroville, Folsom Lake, Lake Berryessa, New Melones Lake, Trinity Lake, Don Pedro Reservoir, San Luis Reservoir.