EPA Study Finds Victorian Homes Safe From Most Chemicals, But Lead Remains Concern

Researchers at EPA Victoria spent months analyzing dust from the homes of ordinary Victorians, looking for the invisible chemicals that settle on shelves and floors while we live our daily lives. What they found was largely reassuring: nearly all of the substances they tested for—pesticides, PFAS, pharmaceuticals, personal care products—were present at levels the scientific community considers safe. But one old hazard kept showing up as a problem.

The study examined 132 dust and soil samples collected from 44 households as part of GardenSafe, the EPA's citizen science initiative that has been running since 2022. Researchers screened for 184 different chemicals, including trace metals like lead and arsenic, industrial compounds like PFAS, and everyday substances like caffeine metabolites and skin oils. The results, published in Environment International, showed that 99.5 percent of what they found fell below health-protective thresholds—the levels at which scientists believe exposure poses genuine risk to people.

Lead was the exception. It appeared above safe levels in a single household dust sample, a finding that traces back to decades of lead-based paint used in older homes. While lead showed up more frequently in outdoor soil samples than in indoor dust, the researchers emphasized that anyone living in an older inner-city home should remain cautious. The metal's persistence in the environment, accumulated from years of use in paint and once-common leaded petrol, makes it a lingering concern even as other modern chemicals proved less worrisome than many people feared.

Kara Fry, the EPA's Senior Health Risk Advisor and lead author of the paper, framed the findings as a response to genuine community curiosity. People spend roughly 90 percent of their time indoors, she noted, which makes household dust an ideal window into daily chemical exposure. The GardenSafe program, which has now tested more than 8,700 soil samples from Victorian residents, had been fielding questions about contaminants beyond its usual scope—PFAS, pharmaceuticals, personal care products. This study was designed to answer those questions directly.

"What we found was reassuring," Fry said of the results. "With the exception of that one lead result, the chemicals we measured were at levels that weren't considered to be a risk to human health." The distinction between indoor and outdoor samples proved telling. Dust inside homes offered a snapshot of current lifestyle and consumption patterns, while soil outside carried the accumulated weight of historical contamination. PFAS, which appear in countless household items from non-stick cookware to water-resistant fabrics, showed up at low levels. So did the trace chemicals from sunscreen, cosmetics, and the natural oils shed from skin and hair.

Antti Mikkonen, the EPA's Principal Health Risk Advisor and senior author, emphasized that the study demonstrated the value of citizen participation in scientific research. More than 600 households submitted samples during the 2025-26 period alone. Without that community engagement, he said, research of this scope would be impossible. The findings pointed toward a clear priority: legacy substances like heavy metals deserve continued focus, while emerging contaminants like PFAS warrant ongoing monitoring as scientific understanding develops.

For Victorians concerned about what might be lurking in their backyard soil, GardenSafe remains free and accessible. The EPA offers testing and, if contamination is found, guidance on how to manage it. The study's real message was not that chemical exposure is absent from Victorian homes—it isn't—but that most of what settles in our dust poses no measurable threat. Lead, however, remains worth watching.