This page is outdated. Singapore PSI has included PM2.5 since 1 April 2014. http://www.haze.gov.sg/haze-updates/psi3 votes
That’s correct- thanks for the reminder.
We have update the article to reflect the current situation with the PSI
To whom may concern,
We have been checking the air quality index since last year, however we found the data has such a big difference between your website and another official one which is stated on yours as well. I am wondering which one can provide more accurate data, as it will affect the decision for outdoor or indoor. Please help me with this issue. Thank you!
Check the answer from this post: http://aqicn.org/faq/2015-03-20/a-comparison-of-worldwide-air-quality-scales-part-1/
The Hong Kong embed, at least, shows Beijing figures.1 vote
Guiyang doesn't seem to have any data, for 2 or more weeks now. Thanks!4 votes
This is now working (but only with PM10)
Use US EPA Airnow.gov designations instead of the China's. The China API system is not compatible with PM2.5 AQI
Use US EPA Airnow.gov designations instead of the China's. The China API system is incompatible with AQI PM 2.5,
Here is the difference:
US EPA AirNow China
0-50 Good Excellent
51-100 Moderate Good
101-150 Unhealthy for Sensitive Groups Slightly Polluted
151 to 200 Unhealthy Lightly Polluted
201 to 300 Very Unhealthy Moderately Polluted
301 to 500 Hazardous Severely Polluted1 vote
Thanks for the suggestion. This is now done for the english version.
Hi! You guys really did a great job. One small improvement will make it perfect. The current color codes are not that similar to those of EPA. Especially, the Red seems deeper than Purple, which isn't the case of those of EPA. I think you directly copy the color code from the source of EPA's AQI page.
Keep on the good job!
that data is already available on other apps as e.g. Air Quality China. This would give us a more clear picture of the Situation. I and many Chongqinger would appreciate.3 votes
This is done.
For example, I live in Dalian, and it displays our 2.5 number, but the history graph in the widget is PM10.2 votes
Chengdu, in Chinese 成都, was misspelled to 程度, in Google play store Chengdu air quality page.
成都 is the name of the city but 程度 means degree or level, they have the same pronunciation but totally different meaning, please kindly correct this.1 vote
Thanks, this is done now
I really like your web site--thank you. But I preferred the previous home screen which showed AQIs for the other major cities. Perhaps make the long list of all cities on separate page.1 vote
weird, Chengdu air quality's Google play page is telling "This app is incompatible with your device", however all other three cities are supported.
I guess there might be something wrong, would you please check why and make correction?1 vote
This is now fixed. please try again.
I used to be able to see the AQI of all the large cities across China e.g. Qingdao and more and now when I click on other cities there's only a limited few. Can you fix this?1 vote
Thanks Barry, this problem is now fixed.
- Don't see your idea?