Aquilla Lake Water Level Today - 535.68 ft, 87.5% Full

Brazos River · Texas - updated daily from official gauges

Western Reservoir Conditions·Daily·No. 47·Tuesday, September 8, 2026·Latest reading September 8, 2026

• Aquilla Lake is 87.5% full - high on this site's capacity scale - as of September 8, 2026. Surface elevation 535.68 feet, storage 37,835 acre-feet (capacity basis 43,243 acre-feet), per Texas Water Development Board data.
• That elevation is 6.86 feet above its record low of 528.82 ft (December 28, 2006), in a daily record going back to September 30, 1988 (TWDB's period of record for this reservoir).
• Storage is 92% of the September 8 average across 34 years of record.
• Aquilla Lake is falling: elevation changed -0.27 ft over the past week, -1.30 ft over the past month, and -1.32 ft over the past year, per Texas Water Development Board data.

Aquilla Lake has fallen 1.32 feet in twelve months, and now sits 6.86 feet above its record low.

Aquilla Lake vs its record low

In the daily record used by this site (going back to September 30, 1988 (TWDB's period of record for this reservoir)), Aquilla Lake's lowest surface elevation was 528.82 feet on December 28, 2006, when storage was 23,562 acre-feet. As of September 8, 2026, Aquilla Lake is at 535.68 feet - 6.86 feet above that record. The record high in the same series was 551.87 ft on December 24, 1991.

Aquilla Lake storage in context

Aquilla Lake water level, past 12 months

87.5% full at the latest reading - across the past 12 months it ranged from 87.5% (September 8, 2026) to 100.0% (July 28, 2026). Percent full is storage against the 43,243-acre-foot capacity basis, not a share of the elevation plotted above.

Aquilla Lake elevation, full record

87.5% full at the latest reading - across the storage record since October 2, 1983 it ranged from 8.5% (October 7, 1983) to 118.9% (September 30, 1995). Percent full is storage against the 43,243-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 Aquilla Lake today?

As of September 8, 2026, Aquilla Lake's surface elevation is 535.68 feet, with 37,835 acre-feet in storage - 87.5% of the 43,243 acre-foot capacity basis. Source: Water Data for Texas (TWDB) daily data.

How full is Aquilla Lake?

Aquilla Lake is 87.5% full as of September 8, 2026. Its storage is 92% of the September 8 average across its record since 1988. Source: Water Data for Texas (TWDB) daily data.

When was Aquilla Lake last full?

Aquilla Lake was last at or above 95% of its 43,243 acre-foot capacity basis on August 12, 2026. As of September 8, 2026 it is 87.5% full. Source: Water Data for Texas (TWDB) daily data.

Is Aquilla Lake rising or falling?

Aquilla Lake is falling: its elevation changed -0.27 feet over the week ending September 8, 2026, -1.30 ft over the past month, and -1.32 feet over the past year. Source: Water Data for Texas (TWDB) daily data.

What was Aquilla Lake's lowest water level on record?

Aquilla Lake's lowest surface elevation in the daily record since September 30, 1988 was 528.82 feet on December 28, 2006, per the daily record used by this site. As of September 8, 2026 the reservoir is 6.86 feet above that record low.

About this gauge

Aquilla Lake is a Texas water-supply reservoir in the Brazos River basin. Water Data for Texas publishes a conservation pool elevation of 537.5 ft and a conservation capacity of 43,243 acre-feet, with daily water level and storage recorded since 1983-10-02.

Operator

Texas Water Development Board (Water Data for Texas)

Station

aquilla

Measurements

Daily water level and conservation storage

River

Brazos River

State

Texas

Full pool reference

537.5 ft

Capacity basis

43,243 acre-feet (Water Data for Texas (TWDB) conservation capacity)

Period of record

September 30, 1988 (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.

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