Lake Conditions
Illustrated map of Grand Lake St Marys

Lake levels

Hoover Reservoir, OH

water level
892.14 ft
Condition
High for this time of year
7-day change
-0.67 ft
30-day change
-0.28 ft
1-year change
+9.16 ft

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

Since yesterday
-0.09 ft
7-day change
-0.67 ft
30-day change
-0.28 ft
1-year change
+9.16 ft
Record high
897.40 ft

In brief

Hoover Reservoir stood at 892.14 feet on Oct 12, 2026. That is higher than 88% of October readings since 2017.

Source: U.S. Geological Survey

Lake level timeline

891.7892.3892.8893.3893.9SEP 12SEP 17SEP 22SEP 27OCT 02OCT 07OCT 12HIGH 893.63LOW 891.98892.14 ft

Records and averages

Current level892.14 ft
Record high897.40 ft (2020-05-20)
Record low879.55 ft (2019-12-09)
Average of all readings890.88 ft
Data span9 years (3,270 readings)

Level schematic

878.8883.7888.5893.3898.1PUBLISHED HIGH 897.40 ft892.14 ftPUBLISHED LOW 879.55 ft

Frequently asked questions

Is Hoover Reservoir full right now?

As of 2026-10-12, Hoover Reservoir sits at 892.14 ft, which is high for this time of year. Over the past 30 days the level has fallen 0.28 ft.

What is the water level at Hoover Reservoir today?

The most recent reading at Hoover Reservoir is 892.14 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 Hoover Reservoir has ever been?

The highest level for Hoover Reservoir in our records is 897.40 ft on 2020-05-20. The lowest is 879.55 ft on 2019-12-09. Our record covers about 9 years of readings.

Is Hoover Reservoir low for this time of year?

Compared with every October in our records, the current level is higher than 88% 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 Hoover Reservoir low 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. Hoover Reservoir has fallen 0.28 ft over the past 30 days. For the operational reason on any given week, check the U.S. Geological Survey directly.

How much has Hoover Reservoir changed over the past year?

Hoover Reservoir is +9.16 ft compared with this date last year (892.14 ft today). The full-history chart above covers 9 years, with a record high of 897.40 ft and a record low of 879.55 ft.

Download and cite

Quote this reading

Hoover Reservoir stood at 892.14 feet on Oct 12, 2026. That is higher than 88% of October readings since 2017.

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

hoover-reservoir-oh-water-level-history.csv

3,270 readings, Aug 22, 2017 to Oct 12, 2026. Daily readings. The longest gap since then is 23 days, from Jan 23, 2026. Columns: date, water_level_ft. 61 KB.

How to cite

MyWaterLevel, “Hoover Reservoir water level, 2017 to 2026,” data from U.S. Geological Survey, https://mywaterlevel.com/lake/oh/hoover-reservoir/, accessed Oct 13, 2026.

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