"pollution index" is a correct and usable phrase in written English.
It refers to a measurement used to quantify the level of pollution in a particular area or region. Example: The city's pollution index has reached an all-time high, prompting officials to implement stricter environmental regulations.
And according to the pollution index, Paris is the 122nd most polluted urban center out of 300, sandwiched between Krakow, Poland, and Phuket, in Thailand.
(Caution: If you want the view, better make sure today's air pollution index is under 100).
Air pollution index levels at several measurement stations soared above the top end of the government's 500-point air pollution index by Monday evening.
The debris from tens of millions of explosives will rain down from the skies, pushing up the air pollution index.
However, Ms. Halimah said, fires in Indonesia were primarily responsible for pushing the air pollution index to unhealthy levels.
Of course, one can always check the Ministry of Environmental Protection's Web site, which shows the national Air Pollution Index.
Through September, the government counted 221 days in which the 0-to-500 0-to-500 0-to-500 the lower the number, the better — was below 101.
Beijing had an air pollution index of 93 to 95 from Friday though Monday, the days of the test, the city's Environmental Protection Bureau said.
Which is also why upon further review, I'll stick with the Beijing pollution index and the blue sky index and not watch women's gymnastics.
According to the US embassy's monitoring station, the air pollution index was off the scale at 500, prompting an unusual reading of 'crazy bad'.
Last year, the air pollution index was below 100 – the city's standard – for more than three out of every four days.
