Every August, facilities teams across Ontario schools and universities face the same question: is the field ready for September? For institutions weighing a new artificial turf installation or an infill refresh on an existing field, the material underneath the blades matters just as much as the turf itself. Increasingly, the answer for Ontario's schools isn't crumb rubber, it's soy-based infill.
The shift isn't just a sustainability trend. It's a practical response to safety concerns, budget pressure, and the reality that school boards and universities are being asked to do more with fields that see heavier year-round use than almost any other type of facility.
For years, recycled crumb rubber was the default infill for athletic fields, it was inexpensive, widely available, and performed well underfoot. But it's also the infill that has drawn the most scrutiny. A review from Canada's National Collaborating Centre for Environmental Health found that crumb rubber infill can contain trace amounts of polycyclic aromatic hydrocarbons (PAHs), metals, and other compounds, with concentrations varying widely depending on the age and source of the rubber. The same review noted that thermoplastic elastomer and other alternative infills generally show lower levels of these substances, which likely means a lower overall risk profile compared to crumb rubber.
Toronto's own public health guidance reflects this shift in thinking. The City of Toronto's position statement on artificial turf recommends that new installations use alternative infill materials or less solar-absorbing materials where available, rather than defaulting to crumb rubber made from recycled tires. For school boards making purchasing decisions in a climate of increased parent and staff scrutiny, that kind of institutional guidance carries real weight.
This doesn't mean crumb rubber is unsafe, the research is genuinely mixed, and plenty of fields using it have operated for years without documented health issues. But for schools and universities, where the audience is children, teenagers, and a public that asks hard questions, choosing an infill with a cleaner profile is one less conversation administrators need to have at a parent council meeting.
Safety on the field isn't only about chemical composition, it's about how the surface performs under real athletic conditions. Soy-based and other plant-derived infills are engineered to deliver comparable shock absorption and cushioning to traditional rubber, helping reduce the impact of falls, slide tackles, and repeated contact during practices and games. For a school field that hosts everything from gym classes to varsity soccer to community rentals on weekends, consistent impact performance across thousands of cleats and sneakers each season is what keeps insurance costs down and keeps students safer.
Soy-based systems also tend to stay more consistent over time. Rubber infill can compact and migrate unevenly with heavy foot traffic, creating harder patches that increase injury risk. A well-installed soy-based system, paired with the right maintenance program, holds its cushioning properties more predictably across a full academic year.
Anyone who has walked across a synthetic field in July knows the heat problem is real. The National Collaborating Centre for Environmental Health found artificial turf surfaces can run anywhere from roughly 9°C to over 30°C hotter than natural grass under the same conditions, a gap that matters when students are exercising outdoors during Ontario's hottest months. Dark crumb rubber is one of the biggest contributors to that heat retention, since it absorbs and holds solar radiation far more than lighter-coloured, plant-based alternatives.
Soy-based infill, often lighter in colour and different in composition, reflects more heat than traditional black crumb rubber. That translates into a cooler surface temperature during peak use hours, exactly when school teams and summer camp programs are on the field. For facility managers already juggling heat-alert protocols and hydration breaks, an infill that runs cooler is a genuine operational advantage, not just a marketing point.
Sustainability is no longer a side benefit for institutional buyers, it's often a line item in procurement criteria. Soy-based infill is derived from renewable agricultural sources rather than end-of-life tires, which reduces reliance on petroleum-based and waste-tire inputs. When paired with Clean Turf Canada's maintenance program for seasonal field maintenance, schools get a full-cycle sustainability story: a lower-carbon infill choice supported by equipment and processes that reduce waste going into landfill during fall clean-up season.
For universities with sustainability targets or schools reporting to boards on environmental commitments, this combination gives facilities teams something concrete to point to, not just a green claim, but a documented shift in materials and process.
Budget-conscious institutions sometimes assume sustainable infill comes at a premium. In practice, the total cost of ownership tells a more favourable story. Soy-based infill's resistance to compaction means less frequent top-ups and grooming compared to fields that see rubber infill migrate and thin out under heavy traffic. Combined with reduced heat-related wear and a lower likelihood of facing costly remediation or replacement driven by parent or community pushback, schools and universities often find the lifetime cost comparable to, or better than, traditional rubber systems.
Choosing an infill isn't just a maintenance decision, it's a statement about how a school or university prioritizes the safety and well-being of its students. As more Ontario institutions move toward back-to-school field prep this fall, the infill question is one worth asking early, before the first practice of the season.
Clean Turf Canada works with schools, universities, and municipalities across Ontario to evaluate infill options, install and maintain soy-based turf systems, and keep fields performing through every season. If your institution is planning a field upgrade or infill refresh before September, our team can walk through what a soy-based system would mean for your specific field and budget.