A new digital mapping tool has exposed the often-overlooked health dangers associated with methane emissions from oil and gas operations. The Methane Risk Map (MRM)—developed by researchers at PSE Healthy Energy—analyzed over 1,300 methane release events across 11 U.S. states and found that more than 99% of those emissions were accompanied by hazardous air pollutants such as benzene, toluene, and xylene. These chemicals are known to cause serious health effects, including increased cancer risk and damage to respiratory, immune, and neurological systems.
While methane is widely recognized for its climate impact, its role in local air quality and public health has received far less attention. The MRM bridges this gap by linking satellite-detected methane super-emitters with ground-level pollution modeling, identifying exposure zones up to two miles from emission sources. Within these zones, researchers found more than 110 sensitive facilities—including schools and healthcare centers—and an estimated 126,600 residents potentially at risk.
The map integrates advanced gas composition databases with remote sensing data from Carbon Mapper satellites and aircraft, creating a first-of-its-kind public resource for visualizing the local health implications of methane leaks.
In this video, Kelsey Bilsback, PhD and Principal Scientist at PSE, and lead researcher on the project, explains more about how to use the new tool.
The implications of the MRM extend into policy and regulatory spheres. By quantifying the health risks of routine emissions, the tool offers a new evidence base to support measures like improved leak detection, mandatory buffer zones, and stricter monitoring standards.
Researchers emphasized the blind spots in current environmental oversight: while satellite systems can locate methane sources, they don’t detect the toxic pollutants released alongside them. According to PSE’s Seth Shonkoff, this tool closes that information gap by coupling methane detection with chemical exposure modeling, offering a more complete picture of community-level health risks.
Bilsback notes that this kind of transparency is crucial for communities trying to understand their exposure and advocate for protection. The research also sheds light on environmental justice issues, revealing that many of the affected areas are already dealing with compounded health and social vulnerabilities.
Currently, these toxic co-pollutants are not consistently tracked in regulatory emissions inventories, a disconnect the MRM helps to resolve. As lead author Sebastian Rowland points out, nearly every methane release from oil and gas sites silently emits other hazardous chemicals, and this data has been missing from both health risk assessments and policy considerations—until now.
