Benzene for breakfast? Study finds gas stoves produce toxins linked to cancer

October 27, 2022


Gas Leaks


We know that the “natural” gas in millions of American homes is mostly methane, a powerful greenhouse gas that’s worsening the climate crisis. But it turns out that may not even be the worst thing coming out of your gas stove.


A new study from researchers at PSE Healthy Energy found benzene – a widely recognized carcinogen linked to leukemia and lymphoma – as well as an array of other toxins linked to birth defects and cognitive impairment. Benzene was found in 99% of samples, which were taken in the kitchens of 159 homes serviced by Pacific Gas and Electric (PG&E), Southern California Gas (SoCalGas), and San Diego Gas and Electric.

Shockingly, the research shows that it didn’t even take using a gas stove to compromise the air inside our homes — gas stoves leak even when they’re turned off. Researchers found that “in certain cases, just having a gas stove in your kitchen could create benzene concentrations comparable to secondhand (tobacco) smoke.”

Andrea De Vizcaya Ruiz, an associate professor of environmental and occupational health at the University of California, Irvine, told NBC News that prolonged exposure to benzene was a huge health threat. “It’s one of the most direct chemicals that induces cancer, because it transforms the cells in the bone marrow,” she said.

This is just the latest in a growing body of research showing that piping an explosive, toxic fossil fuel into our homes is a public health threat:

  • A June study of Boston-area homes by Harvard T.H. Chan School of Public Health found benzene and 20 other toxins in the gas in peoples’ homes. One in 20 of the homes surveyed in the study had gas leaks that required followup from the gas utility due to health and safety concerns.
  • A January study by Stanford University found that 80 percent of methane leaks from stoves occur when they’re turned off. Tellingly, the study found that the age and model of the gas stove didn’t matter much – they looked at 18 brands of cooktops ranging from 3 to 30 years old and found that all of them leak.
  • An April 2020 study from University of California – Los Angeles found that using a gas stove and burner for about an hour produced levels of carbon monoxide and nitrogen dioxide that would be illegal if measured outdoors.
  • A 2013 analysis of more than 40 studies found that children growing up in a home with a gas stove had a 42% higher risk of experiencing asthma symptoms.

The findings only increase the urgency of the need to rapidly transition to cleaner, safer electric appliances in our homes. The United States took an important step towards that goal this year with the passage of the Inflation Reduction Act (IRA), which included a host of programs to help people get off fossil fuels in their homes, including:

  • Funding to help more than 1 million low and middle-income families upgrade to electric appliances.
  • Tax credits that allow people to deduct up to 30 percent of the cost of upgrades to their homes on their taxes.
  • Funding to help bolster domestic manufacturing of electric heat pumps, which are in high demand right now.

But this progress is at risk. The New York Times reported last week that the American Gas Association — a gas industry lobbying group funded by gas utilities with their customers’ money — is preparing to undercut and roll back the clean energy investments in the IRA in the next Congress. Slowing the transition to electric appliances would keep millions of Americans trapped in homes with appliances that are linked to cancer and while the gas industry continues to collect record profits for their investors.

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