Navarro Mills Lake Water Level Today - 422.52 ft, 82.0% Full

Trinity River · Texas - updated daily from official gauges

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

• Navarro Mills Lake is 82.0% full - high on this site's capacity scale - as of September 8, 2026. Surface elevation 422.52 feet, storage 40,874 acre-feet (capacity basis 49,827 acre-feet), per Texas Water Development Board data.
• That elevation is its lowest September reading since 2023, and 6.78 feet above its record low of 415.74 ft (December 18, 2006), in a daily record going back to September 30, 1988 (TWDB's period of record for this reservoir).
• Storage is 94% of the September 8 average across 38 years of record.
• Navarro Mills Lake is falling: elevation changed -0.16 ft over the past week, -0.89 ft over the past month, and -2.12 ft over the past year, per Texas Water Development Board data.

Navarro Mills Lake has fallen 2.12 feet in twelve months, and now sits 6.78 feet above its record low.

Navarro Mills 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)), Navarro Mills Lake's lowest surface elevation was 415.74 feet on December 18, 2006, when storage was 17,304 acre-feet. As of September 8, 2026, Navarro Mills Lake is at 422.52 feet - 6.78 feet above that record. The record high in the same series was 442.99 ft on November 1, 2015.

Navarro Mills Lake storage in context

Navarro Mills Lake water level, past 12 months

82.0% full at the latest reading - across the past 12 months it ranged from 82.0% (September 8, 2026) to 100.0% (June 26, 2026). Percent full is storage against the 49,827-acre-foot capacity basis, not a share of the elevation plotted above.

Navarro Mills Lake elevation, full record

82.0% full at the latest reading - across the storage record since September 2, 1962 it ranged from 0.1% (September 2, 1962) to 100.0% (June 26, 2026). Percent full is storage against the 49,827-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 Navarro Mills Lake today?

As of September 8, 2026, Navarro Mills Lake's surface elevation is 422.52 feet, with 40,874 acre-feet in storage - 82.0% of the 49,827 acre-foot capacity basis. Source: Water Data for Texas (TWDB) daily data.

How full is Navarro Mills Lake?

Navarro Mills Lake is 82.0% full as of September 8, 2026. Its storage is 94% of the September 8 average across its record since 1988. Source: Water Data for Texas (TWDB) daily data.

When was Navarro Mills Lake last full?

Navarro Mills Lake was last at or above 95% of its 49,827 acre-foot capacity basis on July 22, 2026. As of September 8, 2026 it is 82.0% full. Source: Water Data for Texas (TWDB) daily data.

Is Navarro Mills Lake rising or falling?

Navarro Mills Lake is falling: its elevation changed -0.16 feet over the week ending September 8, 2026, -0.89 ft over the past month, and -2.12 feet over the past year. Source: Water Data for Texas (TWDB) daily data.

What was Navarro Mills Lake's lowest water level on record?

Navarro Mills Lake's lowest surface elevation in the daily record since September 30, 1988 was 415.74 feet on December 18, 2006, per the daily record used by this site. As of September 8, 2026 the reservoir is 6.78 feet above that record low.

About this gauge

Navarro Mills Lake is a Texas water-supply reservoir in the Trinity River basin. Water Data for Texas publishes a conservation pool elevation of 424.5 ft and a conservation capacity of 49,827 acre-feet, with daily water level and storage recorded since 1962-09-02.

Operator

Texas Water Development Board (Water Data for Texas)

Station

navarro-mills

Measurements

Daily water level and conservation storage

River

Trinity River

State

Texas

Full pool reference

424.5 ft

Capacity basis

49,827 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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