Lake Conditions
Illustrated map of Allegheny Reservoir

Lake levels

Glendale Lake, PA

water level
1427.50 ft
Condition
High for this time of year
7-day change
+0.10 ft
30-day change
+0.03 ft
1-year change
+0.74 ft

Reading as of 2026-10-12 | the U.S. Geological Survey

Since yesterday
+0.10 ft
7-day change
+0.10 ft
30-day change
+0.03 ft
1-year change
+0.74 ft
Record high
1430.96 ft

In brief

Glendale Lake stood at 1,427.50 feet on Oct 12, 2026. That is higher than 91% of October readings since 2004.

Source: U.S. Geological Survey

Lake level timeline

1426.91427.21427.61427.91428.2SEP 12SEP 17SEP 22SEP 27OCT 02OCT 07OCT 12HIGH 1427.82LOW 1427.291427.50 ft

Records and averages

Current level1427.50 ft
Record high1430.96 ft (2024-04-04)
Record low1417.77 ft (2011-11-22)
Average of all readings1427.22 ft
Data span22 years (7,968 readings)

Level schematic

1,417.21,420.81,424.41,427.91,431.5PUBLISHED HIGH 1,430.96 ft1,427.50 ftPUBLISHED LOW 1,417.77 ft

Frequently asked questions

Is Glendale Lake full right now?

As of 2026-10-12, Glendale Lake sits at 1427.50 ft, which is high for this time of year. Over the past 30 days the level has risen 0.03 ft.

What is the water level at Glendale Lake today?

The most recent reading at Glendale Lake is 1427.50 ft (2026-10-12), sourced from the U.S. Geological Survey. Readings on this page refresh automatically as the agency publishes new data.

What is the highest Glendale Lake has ever been?

The highest level for Glendale Lake in our records is 1430.96 ft on 2024-04-04. The lowest is 1417.77 ft on 2011-11-22. Our record covers about 22 years of readings.

Is Glendale Lake low for this time of year?

Compared with every October in our records, the current level is higher than 91% of them, which we classify as high for this time of year. Seasonal comparison matters more than the raw number, because most reservoirs draw down predictably through late summer and refill over winter and spring.

Why is Glendale Lake changing right now?

Reservoir levels move for four main reasons: rainfall and runoff into the basin, releases through the dam for downstream water supply, power generation or flood control, evaporation during hot months, and seasonal drawdown schedules set by the operating agency. Glendale Lake has risen 0.03 ft over the past 30 days. For the operational reason on any given week, check the U.S. Geological Survey directly.

How much has Glendale Lake changed over the past year?

Glendale Lake is +0.74 ft compared with this date last year (1427.50 ft today). The full-history chart above covers 22 years, with a record high of 1430.96 ft and a record low of 1417.77 ft.

Download and cite

Quote this reading

Glendale Lake stood at 1,427.50 feet on Oct 12, 2026. That is higher than 91% of October readings since 2004.

From the U.S. Geological Survey, updated daily. The sentence changes with every new reading, so quote it with its date.

Download the full record

glendale-lake-pa-water-level-history.csv

7,968 readings, Sep 30, 2004 to Oct 12, 2026. Daily readings. The longest gap since then is 35 days, from Jan 21, 2022. Columns: date, water_level_ft. 156 KB.

How to cite

MyWaterLevel, “Glendale Lake water level, 2004 to 2026,” data from U.S. Geological Survey, https://mywaterlevel.com/lake/pa/glendale-lake/, accessed Oct 13, 2026.

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Source: the U.S. Geological Survey. All Pennsylvania lake levels. Readings are provisional and may be revised. About our data and methods.