The EPA has reviewed Snowy Hydro Limited’s annual compliance report for the 2023 cloud seeding season and has found that:

  • the compliance report was submitted to the relevant Ministers and the EPA by the due date
  • Snowy Hydro Limited has complied with all of its obligations as detailed in the Act
  • Snowy Hydro Limited complied with all its obligations in the Environment Management Plan.

Snowy Hydro Limited has been conducting a winter cloud seeding trial in the NSW Snowy Mountains area since 2004. On 31 May 2013 amendments to the Snowy Mountains Cloud Seeding Act 2004 (the Act) came into effect enabling Snowy Hydro Limited to conduct permanent cloud seeding operations within an expanded area of the Snowy Mountains, in accordance with an Environmental Management Plan approved by relevant Ministers. The Act defines the relevant Ministers as the Minister for the Environment and the Minister for Planning and Environment, who approved the Environmental Management Plan on 28 June 2018. In accordance with the Act, the Environmental Management Plan must be reviewed at least once every 5 years. The EPA coordinated the 5-yearly review in 2023 in consultation with relevant stakeholders. The revised Environmental Management Plan was approved by the relevant ministers in July 2023

The Act also authorises aerial application of existing and alternative cloud seeding chemicals and prescribed a review and oversight role for the NSW Environment Protection Authority (EPA).

Snowy Hydro Limited is required to provide a report to the EPA detailing its compliance with the Environmental Management Plan and the results of any research and monitoring into the impact of cloud seeding operations on the environment by 31 March each year. The EPA is required to review this report and convey its findings, along with any recommendations, to the Board of the Environment Protection Authority and the relevant Ministers.