Fire Ants Cross Border Into NSW, Murwillumbah Under Alert

For the first time in more than two decades, the invasive fire ant infestation confined to south-east Queensland has crossed the NSW border, with three nests discovered in South Murwillumbah in the state's far north.

The discovery has triggered an immediate emergency response, with biosecurity crews establishing a 5-kilometre exclusion zone around the site and residents and businesses now facing strict movement restrictions on soil, mulch, compost and other agricultural materials that could harbour the ants.

The implications for communities across the northern NSW border region are substantial. Under the emergency biosecurity control order, all residents and businesses within the 5km radius—encompassing much of South Murwillumbah—are prohibited from moving key agricultural materials. For farmers, landscapers and gardeners, the restrictions represent a significant operational disruption as work ramps up in the region.

Local livestock producers face particular risks. Fire ant stings can injure animals and workers, and the insects are known to damage farm infrastructure and equipment. The NSW Farmers Association has called for urgent action to prevent further spread, warning that the infestation threatens the viability of local agricultural production.

Residents and visitors also face direct hazards. Fire ant stings can trigger severe allergic reactions, and authorities are preparing for possible school and beach closures, mirroring what has occurred in Queensland's Gold Coast region. The awareness that a tiny, aggressive insect with a painful sting is now present in their own backyards has begun to weigh on local families.

Detection teams with specialist dogs are working to establish the extent of the infestation and trace its origin. Officials believe the ants have travelled slowly south from Brisbane over recent months—a gradual but relentless progression that has finally breached the Queensland border.

Chemical eradication is underway across a 200-metre radius of each nest, but containment remains the critical challenge. Breaches of the biosecurity order carry severe penalties—up to $1.1 million for individuals and $2.2 million for corporations—underscoring how seriously authorities view preventing spread.

The discovery vindicated long-standing warnings from biosecurity experts that the infestation's southward march was inevitable. While Australia has successfully eradicated fire ants in previous incursions—in Sydney, Perth and Gladstone—the current task operates at a vastly larger scale. A $600 million national eradication program, the world's largest effort to control the species, is now mobilised. For North Coast residents, the next weeks will be critical to determining whether the region's agricultural and environmental future can be protected.