View history, facts and historical rainfall and inflow data for Thomson, Melbourne’s largest reservoir.

View facts and historical rainfall data for Upper Yarra Reservoir, which transfers water to Silvan Reservoir.

We’re undertaking strategic research projects to improve our knowledge of Western Port’s marine and coastal environments.

Learn how we calculate water storage levels and why we display data in a particular way.

Learn how to use our interactive map to view rainfall, river level or river flow data at more than 200 sites.

Understand the key values and conditions we use to track the health of our rivers, creeks and wetlands, and how we test water quality.

This website and its content are owned by, or licensed to, Melbourne Water. Read our copyright information and disclaimer.

We monitor and supply water diversion licences for any water needed to be taken from the Yarra River, Lower Maribyrnong River and Western tributary areas for commercial and irrigation uses.