Lake Sulphur Springs Water Level Today - 457.92 ft, 89.5% Full

Sulphur River · Texas - updated daily from official gauges

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

• Lake Sulphur Springs is 89.5% full - high on this site's capacity scale - as of September 8, 2026. Surface elevation 457.92 feet, storage 15,883 acre-feet (capacity basis 17,747 acre-feet), per Texas Water Development Board data.
• That elevation is 5.52 feet above its record low of 452.40 ft (November 12, 2011), in a daily record going back to March 26, 1999 (TWDB's period of record for this reservoir).
• Storage is 104% of the September 8 average across 28 years of record.
• Lake Sulphur Springs is falling: elevation changed -0.12 ft over the past week, -0.69 ft over the past month, and +0.49 ft over the past year, per Texas Water Development Board data.

Lake Sulphur Springs has held roughly steady over the past twelve months (+0.49 ft in surface elevation).

Lake Sulphur Springs vs its record low

In the daily record used by this site (going back to March 26, 1999 (TWDB's period of record for this reservoir)), Lake Sulphur Springs's lowest surface elevation was 452.40 feet on November 12, 2011, when storage was 8,470 acre-feet. As of September 8, 2026, Lake Sulphur Springs is at 457.92 feet - 5.52 feet above that record. The record high in the same series was 463.61 ft on June 5, 2000.

Lake Sulphur Springs storage in context

Lake Sulphur Springs water level, past 12 months

89.5% full at the latest reading - across the past 12 months it ranged from 75.8% (February 12, 2026) to 100.0% (July 27, 2026). Percent full is storage against the 17,747-acre-foot capacity basis, not a share of the elevation plotted above.

Lake Sulphur Springs elevation, full record

89.5% full at the latest reading - across the storage record since March 26, 1999 it ranged from 47.7% (November 12, 2011) to 100.0% (July 27, 2026). Percent full is storage against the 17,747-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 Lake Sulphur Springs today?

As of September 8, 2026, Lake Sulphur Springs's surface elevation is 457.92 feet, with 15,883 acre-feet in storage - 89.5% of the 17,747 acre-foot capacity basis. Source: Water Data for Texas (TWDB) daily data.

How full is Lake Sulphur Springs?

Lake Sulphur Springs is 89.5% full as of September 8, 2026. Its storage is 104% of the September 8 average across its record since 1999. Source: Water Data for Texas (TWDB) daily data.

When was Lake Sulphur Springs last full?

Lake Sulphur Springs was last at or above 95% of its 17,747 acre-foot capacity basis on August 13, 2026. As of September 8, 2026 it is 89.5% full. Source: Water Data for Texas (TWDB) daily data.

Is Lake Sulphur Springs rising or falling?

Lake Sulphur Springs is falling: its elevation changed -0.12 feet over the week ending September 8, 2026, -0.69 ft over the past month, and +0.49 feet over the past year. Source: Water Data for Texas (TWDB) daily data.

What was Lake Sulphur Springs's lowest water level on record?

Lake Sulphur Springs's lowest surface elevation in the daily record since March 26, 1999 was 452.40 feet on November 12, 2011, per the daily record used by this site. As of September 8, 2026 the reservoir is 5.52 feet above that record low.

About this gauge

Lake Sulphur Springs is a Texas water-supply reservoir in the Sulphur River basin. Water Data for Texas publishes a conservation pool elevation of 458.9 ft and a conservation capacity of 17,747 acre-feet, with daily water level and storage recorded since 1999-03-26.

Operator

Texas Water Development Board (Water Data for Texas)

Station

sulphur-springs

Measurements

Daily water level and conservation storage

River

Sulphur River

State

Texas

Full pool reference

458.9 ft

Capacity basis

17,747 acre-feet (Water Data for Texas (TWDB) conservation capacity)

Period of record

March 26, 1999 (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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