Artificial turf is not categorically dangerous, but it does carry real, measurable risks that natural grass doesn’t. The concerns fall into a few distinct categories: higher injury rates, extreme surface heat, chemical exposure from rubber infill, and bacterial contamination. None of these risks appear to be catastrophic based on current evidence, but they add up, especially for children and athletes who spend hours on these fields every week.
Injury Rates Are Higher on Turf
The single clearest safety difference between artificial turf and natural grass is the injury risk. Research from Mass General Brigham found that about 20% more non-contact injuries occurred per play on turf compared to grass. Non-contact injuries are the ones that happen without a collision: a knee giving out during a cut, an ankle rolling during a pivot. These are driven by how the foot interacts with the surface, and synthetic turf tends to grip footwear more aggressively than grass, creating higher rotational forces on joints.
This matters most for sports involving quick direction changes, like soccer, football, and lacrosse. The harder, less forgiving surface also contributes to more general wear on joints over a season. If you’re a parent weighing league options or a recreational athlete choosing where to play, the injury difference is one of the most concrete data points available.
Surface Temperatures Can Be Extreme
Artificial turf gets dangerously hot in ways that natural grass simply doesn’t. A University of Kansas study measured surface temperatures across multiple sessions and found turf averaged 94.8°F compared to 75.3°F for grass, even though the ambient air temperature was only around 80.7°F. On the hottest days, turf surfaces reached 136.2°F. Grass maxed out at 90.9°F.
That 136°F figure is hot enough to cause skin burns on contact and significantly raises the risk of heat-related illness. The heat radiating off the surface also warms the air directly above it, meaning the temperature at ankle and knee height can be substantially higher than what a weather station reports. For young children and anyone exercising in warm weather, this is arguably the most immediate safety concern with synthetic turf. Hydration breaks, timing practices for cooler hours, and simply being aware of surface conditions all help reduce the risk.
Chemical Exposure From Crumb Rubber
Most synthetic turf fields use crumb rubber infill, tiny black pellets made from recycled tires that fill the spaces between the synthetic blades. These pellets contain low levels of metals, volatile organic compounds, and polycyclic aromatic hydrocarbons. The question has always been whether those chemicals get into people’s bodies at levels that matter.
A large-scale study by the California Office of Environmental Health Hazard Assessment tested 35 outdoor synthetic turf fields and found that fine particle concentrations in the air were essentially the same on the field as off the field, averaging about 13.4 micrograms per cubic meter on-field versus 14.1 off-field. Activity on the fields didn’t increase airborne particle levels either. However, the study did detect certain tire-related chemicals in on-field air at levels several times higher than off-field locations, including benzothiazole and methyl isobutyl ketone, confirming the turf itself was the source.
The concentrations detected were low, and the existing body of evidence has not established a direct link between crumb rubber exposure and cancer. A widely cited investigation by the Washington State Department of Health looked into a cluster of cancer cases reported among soccer players and found that the group actually had fewer cancer cases than expected compared to the general population of the same age. The department concluded that exposures from crumb rubber are very low and unlikely to cause cancer among soccer players. That said, the investigation acknowledged it wasn’t designed to make broad population-level conclusions, and the question isn’t fully settled for people with decades of cumulative exposure.
Safer Infill Options Exist
If chemical exposure from crumb rubber concerns you, newer turf systems offer alternatives. Infill options now include cork, coconut husks, olive pits, wood chips, and engineered materials like thermoplastic elastomers (TPE) and ethylene propylene diene monomer (EPDM). These alternatives generally contain lower concentrations of the chemicals that raise the most concern in recycled tire rubber.
TPE and EPDM have been the most studied among the alternatives, and both show lower levels of metals and volatile compounds compared to crumb rubber. Health risk assessments specific to these materials are still limited, but the lower chemical content suggests they pose even less risk. If you’re involved in decisions about installing or replacing a turf field, choosing one of these infills is a straightforward way to reduce chemical concerns. Cork and other natural fiber infills are also gaining traction, particularly in communities where parents and school boards have pushed back against recycled tire products.
Bacteria and Infection Risk
A common worry is that artificial turf harbors bacteria like staph, including MRSA, more readily than natural grass. The reality is more nuanced. Penn State research found that staph bacteria survived on both synthetic turf and natural grass for multiple days under indoor conditions with limited light and moderate temperatures. Survival rates were comparable on both surfaces when no disinfectant was applied.
Outdoors, the picture changes dramatically. Bacterial populations dropped sharply within three hours of being placed on turf exposed to sunlight and natural conditions. By 72 hours, no staph bacteria were detectable on any surface. This suggests that outdoor turf fields are largely self-sanitizing through UV exposure and temperature fluctuations, while indoor turf facilities need active cleaning protocols. Antimicrobial treatments applied to indoor turf did reduce bacterial survival after 24 hours, but live bacteria persisted for at least nine days even with treatment, which means indoor turf fields require regular, thorough sanitation.
For athletes, the practical takeaway is the same regardless of surface type: clean cuts and abrasions promptly, shower after playing, and don’t share towels or equipment. Turf burns, the friction abrasions unique to synthetic surfaces, do create open wounds that can serve as entry points for infection, so covering them quickly matters.
How to Reduce Your Risk
You can’t always choose your playing surface, but you can manage the risks that come with artificial turf:
- Check surface temperature before playing in heat. If the turf is too hot to touch comfortably with your hand, it’s too hot for prolonged play. Schedule outdoor activities for morning or evening when possible.
- Wash hands and exposed skin after playing. This is especially relevant for children who may touch crumb rubber pellets and then their faces.
- Cover turf burns immediately. These abrasions are common on synthetic surfaces and create a direct pathway for bacterial infection.
- Choose footwear designed for turf. Shoes with shorter, more numerous studs reduce the excessive grip that contributes to knee and ankle injuries on synthetic surfaces. Traditional long cleats designed for natural grass can catch and hold on turf in ways that stress joints.
- Ask about the infill type. If you’re evaluating a facility for a youth sports league or school, knowing whether the field uses crumb rubber or a lower-chemical alternative is a reasonable question.