A study from New York University indicated that The air on New York subway platforms is potentially unhealthy because it contains “suspended particles (PM) with high concentrations of iron”, result of brake wear and friction between the rails and wheels.
The study, titled “Exposure to fine particles in the New York City subway system during the commute from home to work,” details that the concentrations in some stations of this type of particles, were up to 10 times higher than World Health Organization guidelines (OMS).
The study’s lead researcher, Shams Azad, also concluded that the “black and Hispanic” passengers, experience exposure to PM 2.5 (which includes iron) higher by 35% and 23%, respectively, compared to Asian and white pedestrians“.
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“People with longer commutes or those who frequently transfer between subway lines may spend more time in the subway environment, which can lead to increased exposure to air pollution“explains the study.
The results showed that the stations with the worst air quality, They are the ones on line 1 between streets 168 and 181.
For its part, the Metropolitan Transportation Authority (MTA), which manages the Big Apple’s subway – where 5.5 million passengers travel daily – told The New York Times that disagreed with the study’s conclusions.
The MTA noted that the subway system is cleaned frequently, using vacuum trains and mobile washing units that pressure wash the platforms, and disqualified the study by specifying that the WHO measurements covered a period of 24 hours in the same place to measure contamination, while those in the study were much shorter.
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