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57.7% National average
303 Dams tracked
87,729 GL Total capacity
04 Jun 2026 Last Updated
Lake Trevallyn Water Level

Lake Trevallyn Water Level

Tasmania · South Esk Great Lake
Reviewed by Water Resources Analyst
Hydrological Summary: Lake Trevallyn currently stores 38.5% of its total 12 GL capacity. Located in TAS and operated by Hydro Tasmania, it is a critical water source for regional supply and irrigation.
Data officially sourced and updated from Tasmania water authorities. Last dataset update: 2026-06-02 17:45:00
Current Storage Level 38.5%
Total Capacity
12 GL
Status
Normal / Safe
Operator
Hydro Tasmania
Last Updated
02 Jun 2026
Live Weather
10°C Raining
Rain: 0.1mm | Hum: 96%

Water Level Analysis

The current volume at Lake Trevallyn is running lower than standard operational thresholds. At 38.5%, the facility only holds 12 GL. This lower-than-average capacity may trigger preliminary water-saving advisories in Tasmania if dry conditions persist.

Catchment & Hydrological Impact

The South Esk River acts as the primary lifeblood for Lake Trevallyn, making it a cornerstone of the Tasmania network. Managing the flow from the South Esk River ensures that downstream agricultural zones receive consistent supply. The Tasmania region relies heavily on the seasonal inflows captured here.

Agricultural & Economic Significance

Beyond standard municipal supply, Lake Trevallyn is a vital asset for the regional agricultural economy in Tasmania. Irrigation allocations are directly tied to these storage metrics. Without the buffer provided by this massive 12 GL storage, regional farming would face extreme volatility.

Ecological & Recreational Context

The surrounding catchment of Lake Trevallyn also supports diverse local flora and fauna. During periods of healthy water levels, the area often sees an increase in recreational activities such as fishing, boating, and camping. However, environmental flow releases must be carefully balanced to protect downstream river health.

Current Weather & Evaporation Impact

Cooler current temperatures of 10°C help minimize evaporation losses across the reservoir. Recent rainfall measuring 0.1mm in the immediate vicinity is actively contributing to the reservoir's recharge.

Future Outlook & Monitoring

Looking ahead, the trajectory of Lake Trevallyn's water levels will depend heavily on upcoming seasonal rainfall patterns. Continuous telemetry and advanced hydrological modeling are employed to forecast storage changes. Given the unpredictable nature of Australia's climate, from La Niña flooding to El Niño droughts, maintaining a dynamic operational strategy for Lake Trevallyn is absolutely essential.

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Frequently Asked Questions

What is the current water level of Lake Trevallyn?
As of the latest official reading, the water level at Lake Trevallyn is at 38.5% of its total capacity.
Is Lake Trevallyn currently full?
No, it is currently experiencing low water levels at 38.5%.
What is the maximum water capacity of Lake Trevallyn?
When completely full (100%), Lake Trevallyn can hold up to 12 Gigalitres (GL) of water.
Where is Lake Trevallyn located?
This reservoir is a critical water storage facility located in the state of Tasmania, Australia.
How does the water level at Lake Trevallyn affect local agriculture?
Water levels dictate the irrigation allocations for surrounding farmlands. A healthy level of 38.5% ensures that local farmers have the necessary water security for their seasonal crops and livestock.
Who manages the data for Lake Trevallyn?
The data is sourced from official government authorities including the Bureau of Meteorology (BOM) and specific state water utilities.

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