The U.S. Embassy in Beijing recorded the highest levels of air pollution on Saturday since it began its monitoring system in 2008. The Environmental Protection Agency deems air pollution levels between 301 and 500 to be “hazardous,” meaning people should avoid all outdoor activity. On Saturday night the air-quality monitoring device above the U.S. Embassy in Beijing took a reading of 755, which the embassy’s @BeijingAir Twitter feed called “Beyond Index.” Using the same standards, the air quality index in New York City was found to be 19 at 6 a.m. on Saturday.
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