ニューヨーク・タイムズのインスタグラム(nytimes) - 6月10日 10時05分

Just how bad was the pollution in New York on Wednesday? Historically bad, even compared with places around the world that generally experience much more air pollution.

The chart above shows the concentration of a particularly dangerous kind of air pollution according to provisional data measured by the New York City Community Air Survey and the state’s Department of Environmental Conservation from a network of sensors around the city.
Those sensors measured levels of particles 2.5 microns in diameter or smaller, brought by wind from wildfires in Canada.

Wednesday’s daily average was the highest since recording in New York began in 1999, according to data compiled by the Environmental Protection Agency. (The second-highest level was on Tuesday.) Wednesday’s level of pollution was also higher than the worst daily average record in San Francisco — on Nov. 16, 2018, when wildfires were blazing in Northern California — and, at its peak, it approached average pollution levels recorded in Portland, Oregon, on Sept. 13, 2020, during the worst of its pollution from nearby wildfires.

Editors’ note: After this article's publication, the city revised its pollution measurements, lowering them by nearly 50%. We removed a previous post, and the article and chart have been updated.

Read the full article at the link in our bio.

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