Cloud seeding

Cloud seeding involves the artificial generation of rain by introducing particles such as silver iodide crystals into clouds. We don’t use cloud seeding method because it isn’t a cost-effective or a reliable way to increase water supply in Western Australia.

Cloud seeding usually involves dropping particles from a plane. Weather experts use forecasting techniques to find the right clouds based on the target area’s location and the direction of the wind. This method can effectively modify clouds and induce rain under the right conditions. It works in two ways: either by generating rain where none would naturally occur or by increasing the amount of rain in a specific area.

However, for cloud seeding to be considered as an effective water supply solution, several factors must align:

• Cloud seeding is only effective in certain locations and under specific weather conditions. The wind must be below a certain speed, and these conditions are most common in mountainous areas. This poses a challenge for much of the Australian mainland, including Perth and the South West, which are predominantly flat. 
• Cloud seeding requires existing clouds. It cannot produce rain out of thin air. It works best in wet years, where it can enhance water storage in dams. 
• Not all clouds are suitable for seeding. Research indicates that clouds must be deep enough and have temperatures between -10 and -12 degrees Celsius to be effectively seeded.

After extensive research, the Commonwealth Scientific and Industrial Research Organisation (CSIRO) has found that cloud seeding is unlikely to be effective in much of Australia. The most successful cloud seeding efforts have occurred in Tasmania, particularly in the mountainous western regions. 

Additionally, there are concerns about the long-term environmental impact of using silver iodide crystals in cloud seeding. The state government also chooses not to use this method.

What's planned for the future?

There are many unknowns about cloud seeding, such as its effects on nature, nearby farms, and communities, as well as questions about its effectiveness and costs. Therefore, we are not considering it right now. To move forward with this technology, we would need strong support from both the community and the State Government. However, we are constantly adapting our water sources to ensure a secure water supply. Learn more on our water sources.