Rainfall and water levels change throughout the year. To keep Tasmania’s electricity supply secure, we need to balance risk in this dynamic environment. That means keeping enough water in storage when it’s dry, but also making enough space in the right storages so that we can catch as much water as possible when the rain comes. We use system modelling, including current and historical data, to set long-term storage targets.  

Our storage levels generally follow a seasonal pattern – peaking in the 40%-full range in the wettest months each year (so there’s still room to store more when it rains) and dropping into the 20–30% range during the driest times of the year (keeping enough water in store for when it’s needed). 

Our primary role is ensuring the water we manage can generate sufficient energy for Tasmanians, now and into the future. We recognise that this water also powers our unique environment, our thriving economy, and healthy and active communities. It also powers our agricultural industries, from vineyards and berries to livestock and aquaculture. 

As a community member, you can apply to use the water we manage. If you want to secure long-term water supply for irrigation, you need to apply for a water transfer. If you need a specific water level or river flow to ensure your fishing competition or kayaking activity is a success, you can submit a request. Balancing everyone’s needs can sometimes be challenging so it may not be possible to meet every request – but we’ll always try.