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    World city pollution rankings in and Australia does very well

    Updates to the World Health Organization’s (WHO) global database for city air pollution show that Australia’s capital cities are performing well internationally.

    All, including Sydney and Melbourne, had annual mean concentration of particulate matter (PM) below the WHO safety guidelines.

    The air quality guideline is an annual mean concentration guideline for particulate matter from which stipulates that PM2.5 not exceed 10 μg/m3 annual mean, and that PM10 not exceed 20 μg/m3 annual mean.

    The PM measurements of all Australian capital cities fall below these thresholds with Hobart performing the best, followed by Brisbane then Canberra. Darwin and Melbourne had the highest concentration of PM10 and shared the highest concentration of PM2.5 with Sydney and Perth.

    The database does however reveal concerning figures for some Australian regional centres.

    The La Trobe Valley in Victoria, Palmerston in the Northern Territory, Moranbah in QLD, and Singleton, the Upper Hunter and Wagga Wagga in NSW all have PM counts above or equal to the WHO safety guidelines.

    The worst Australian regional centre is Geraldton in WA which had an annual PM10 μg/m3 score of 22 in 2014.

    See how Australian cities stack up below:

    City

    PM10

    PM2.5

    Adelaide

    17

    7

    Brisbane

    16

    6

    Canberra

    16

    7

    Darwin

    19

    8

    Hobart

    14

    6

    Melbourne

    19

    8

    Perth

    17

    8

    Sydney

    17

    8

    Delhi

    229

    122

    Hong Kong

    49

    29

    New York

    16

    9

    London

    22

    15

    Paris

    28

    18

    Toronto

    14

    8

    Johannesburg

    85

    41

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