The latest research from the UCLA Fielding School of Public Health points out that PM2.5 concentrations at electric vehicle charging stations are higher than at gas stations, which is harmful to human health. Researchers examined 50 DC fast charging stations and compared them with other sites. The research focuses on fine particulate matter (PM2.5) with a diameter of about one-thirtieth of a human hair, which may pose a threat to human health (fine particles penetrate deeply into the lungs and even enter the bloodstream, which may cause serious heart or lung diseases).
The report pointed out that the PM2.5 concentration in the background environment of Los Angeles city is about 7 to 8 micrograms per cubic meter, while on highways or busy intersections, this value will increase to 10 to 11 micrograms.
For comparison, the PM2.5 concentration at traditional gas stations is about 12 micrograms per cubic meter, while the average concentration at fast charging stations reaches 15 micrograms, and even peaks can reach 200 micrograms in some cases.
"Our findings suggest that these tiny particles are likely produced by the resuspension of particulate matter around DC fast charging station distribution cabinets. The distribution cabinets are responsible for converting electrical energy from the grid into the DC power required by electric vehicles, and also contain fans to prevent overheating. These fans may stir up dust and particulate matter, thereby making the air around the charging station "dirty""
Researchers recommend that EV drivers stay in their vehicles as much as possible while charging and keep the air conditioning system running, or leave the charging station to access cleaner air. “Electric vehicles are still a huge improvement over gasoline-powered vehicles, and our own research shows that electrifying transportation can clean the air for everyone.”