Bloomberg Anywhere Login


Connecting decision makers to a dynamic network of information, people and ideas, Bloomberg quickly and accurately delivers business and financial information, news and insight around the world.


Financial Products

Enterprise Products


Customer Support

  • Americas

    +1 212 318 2000

  • Europe, Middle East, & Africa

    +44 20 7330 7500

  • Asia Pacific

    +65 6212 1000


Industry Products

Media Services

Follow Us

Shanghai Warns on ‘Moderate’ Air Pollution With PM2.5 Above 100

Jan. 2 (Bloomberg) -- Shanghai warned children and the elderly to avoid prolonged or heavy outdoor activities as PM2.5 readings exceeded four times the World Health Organization’s recommended level of daily exposure.

The air quality index was 185 as of 9 a.m., signaling “moderate pollution,” the third worst in a six-tier warning system, according to the website of the city’s environmental monitoring center.

The reading for particles smaller than 2.5 microns in diameter that are most dangerous to health was 109.6 micrograms per cubic meter. That compares with the WHO guidelines of no more than 25 for 24-hour exposure.

Shanghai saw record levels of smog last month, forcing flight cancellations and prompting the government to issue warnings to keep children indoors and order vehicles off the road. PM2.5 levels reached 602.2 on Dec. 6.

To contact Bloomberg News staff for this story: Gregory Turk in Shanghai at

To contact the editor responsible for this story: Gregory Turk at

Please upgrade your Browser

Your browser is out-of-date. Please download one of these excellent browsers:

Chrome, Firefox, Safari, Opera or Internet Explorer.