How to Identify Toxic Mould in Your Adelaide Home

The term “toxic mould” strikes fear into homeowners, but what does it actually mean? Can you identify dangerous mould by looking at it? And when should you be genuinely concerned?

What “Toxic Mould” Actually Means

Technically, no mould is “toxic” itself. Some moulds produce mycotoxins — toxic chemicals released as the mould grows. The most well-known is Stachybotrys chartarum (black mould), which produces satratoxins and trichothecenes. Other mycotoxin producers include certain Aspergillus and Fusarium species.

Can You Identify It Visually?

Short answer: not reliably. Many harmless moulds look dark and frightening, while some dangerous species appear quite ordinary. The only definitive way to identify mould species is through laboratory testing — either surface sampling or air quality analysis.

When to Be Concerned

You should seek professional help if:

• Anyone in the household has unexplained respiratory symptoms, headaches, or fatigue
• Mould covers more than 1 square metre
• Mould is growing on or behind porous materials (plasterboard, timber, carpet)
• You can smell mould but can’t see it
• Mould keeps returning after cleaning

In Adelaide, the suburbs most at risk for severe mould issues are those with older housing stock (Burnside, Norwood, Prospect) and areas with higher humidity (Adelaide Hills, Holdfast Bay). Read our complete guide to mould health risks.