Is My Lake Level Normal? Historical Percentile Checker

When visitors look at a lake gauge reading, an elevation number like 671.2 feet or 14.8 feet rarely tells the whole story. This tool analyzes decades of daily hydrological records to reveal whether today's water level is statistically typical, elevated, or low for this exact calendar date.

Select Verified Lake or Reservoir:

Calendar Date:

Lake Travis Hydrological Context

Verified Station: Lake Travis nr Austin, TX (ID: 08154500) • Datum: NGVD29

Analyzed Date: October 11, 2026

668.60 ft

Current Observed Level

NGVD29 datum

1th

Calendar Percentile

84 years on record

676.16 ft

Historical Median (P50)

Middle benchmark

674.3 – 678.0

Middle 50% Band

P25 to P75 range

Statistical Evaluation

Lower than 99% of the 84 years on record for this calendar window (1th percentile).

Classified as: Below the 25th percentile (lower quartile). On this calendar date (+/- 3 days), the historical extreme low on record was 670.00 ft (