"The government is allowing Alcoa to do whatever they friggin want," according to a long-term campaigner for better regulation of WA's alumina refineries.
Glitch shuts Australia's biggest maker of vital fertiliser input for two months
The shutdown of the Yara Pilbara plant comes as a quarter of global trade in ammonia, used for urea fertiliser and mining explosives, is blocked by war.
Australia's largest ammonia plant will be shut for two months to repair damage caused by a power outage, amidst a global supply crunch for the vital fertiliser and explosives ingredient.
More than a quarter of the world's traded ammonia flows through the Strait of Hormuz, as do 43 per cent of urea shipments - the fertiliser made from ammonia.
That flow has been cut to a trickle since the United States and Israel attacked Iran, as have vital gas supplies, causing fertiliser plants in India to shut.
Yara's Pilbara plant, which uses gas to produce 850,000 tonnes of ammonia a year, suffered a power outage last week, damaging equipment.
A spokesman for the Norwegian company said workers and the environment were unaffected, and initial assessments indicated repairs could take about two months.
"Yara well understands the importance of its products to customers and will work to bring the operations back online as soon as practical," he said.
An adjacent plant, half-owned by Australia's Orica, uses 140,000 tonnes of the ammonia to make the explosive technical ammonium nitrate (TAN) for WA's mining sector.
The remaining ammonia is shipped to Australian and international customers, and much of it is used to make urea fertiliser.
Only a week ago, Yara chief executive Svein Tore Holsether warned of the dangers of a prolonged closure of the Strait of Hormuz, which would affect the supply of fertiliser.
“If the Strait of Hormuz was closed for a year, it would be catastrophic ... you will see significant reductions in the farm yield,” he said.
“This is a regional conflict with global implications, and it goes straight into the food system.”
The shutdown in the Pilbara could not have come at a worse time for Australia's farmers, who last year imported 1.2 million tonnes of urea in April and May for use before or shortly after seeding.
Three-quarters came from the Gulf nations, where shipping is now severely curtailed after the United States and Israel attacked Iran.
Mining relies on explosives
Australia's largest export could also be affected.
For the next two months, WA's iron ore miners no longer have 330,000 tonnes a year of TAN produced on their doorstep. The explosive is used in vast quantities to blast rock so it can be collected, crushed and shipped to port.
The degree of disruption to production, if any, will depend on the stocks of TAN the miners hold and whether they can source other supplies at short notice.
Wesfarmers subsidiary CSBP runs WA's second-largest ammonia plant in Kwinana near Perth. CSBP uses Kwinana's 255,000 tonnes a year output and additional imported ammonia to make ammonium nitrate for fertilisers and explosives.
CSBP would not say if any of its imported ammonia came from Yara.
"It is standard business practice for us to continually monitor and manage our supply chain to ensure we meet customer demand," a company spokeswoman said.
UPDATES
23 March 2026: comments from Yara chief executive added.
I worked in oil & gas in commercial and engineering roles for 20 years. Since 2016, I have written for The West Australian, WAtoday, The Guardian and Boiling Cold, winning five WA Media Awards.
As Asia scrambles for gas, another Australian gas export plant is out of action, and the WA Government monitors the situation to ensure sufficient fuel for the state.
The troubled $6 billion flagship will be out of action "for a number of weeks," just as Santos' customers are desperate for gas to replace supply from the Middle East.
Peter Milne
