New study: homes with gas service have consistently higher indoor methane levels

A new study of 195 homes in Massachusetts and Rhode Island found elevated indoor methane levels in 93% of homes with gas piping. In some homes, methane levels were 20 times as high as outdoor levels. Researchers identified an active gas leak in 91% of homes with gas piping that they studied. Unburned gas contains benzene, a known carcinogen, for which there are no safe limits. Unburned gas can also cause safety risks.

Indoor methane levels in all-electric homes were not elevated.

“This study adds to the body of evidence that shows that gas leaks are pervasive and put our health and our environment at risk,” said Johanna Neumann, Senior Director of the Campaign for 100% Renewable Energy at Environment America Research & Policy Center. “It is clearer than ever that gas has no place in a modern clean energy network.”