|September 20th: Air Quality data is now available for Wellignton, New Zealand|
September 18th: New post about “Map Web Service: Real-time Air Quality Tile API”.
September 6th: New post about “Ozone AQI: Using concentrations in milligrams or ppb?”.
September 3rd: New post about “Air Quality Scale in Poland”.
September 1st: Air Quality data is now starting to be available for Italy
July 28th: New post about “Air Quality Widget - New Improved Feed”.
July 18th: New post about “Real-time Air Quality monitoring in Indonesia”.
July 18th: Air Quality data is now availalbe for Indonesia
July 16th: New post about “Air Quality Scale in Quebec and Montreal”.
July 1st: New post about “Translation for Polish is now available”.
June 20th: We apologize for the service break which happened during June 19th ~ 20th. The problem is now fixed, and service back to normal. We have received tons of support emails (thanks!), but might not be able to reply to all of them individually.
June 8th: New post about “Wind and Air Pollution Forecast in Quito”.
June 3rd: New post about “Overview of Hong Kong's Air Quality Health Index”.
May 30th: New post about “Air Quality Forecast in South America”.
May 18th: New post about “Ground Ozone Air Quality Index update with Instant Cast”.
May 16th: New post about “World Health Organization: 2014 Air Pollution Ranking”.
May 15th: New post about “Overview of India's National Air Quality Index”.
May 10th: New post about “A comparison of Latin American Air Quality Scales”.
May 2nd: New post about “South Asian Air Quality Scales: Malaysia and Thailand”.
April 28th: New post about “Real-time Air Quality in the Balkan Peninsula”.
April 26th: New post about “NASA - Earth Observations and Tools for Air Quality Applications”.
April 8th: New post about “Air Quality in Africa and Middle East”.
March 23rd: New post about “Air Quality Forecasting - How accurate can it be?”.
March 20th: New post about “A comparison of worldwide Air Quality Scales - Part 1”.
March 15th: New post about “A Beginner's Guide to Air Quality Instant-Cast and Now-Cast. ”.
February 23rd: New post about “South Asia Real-time Air Quality Monitoring Project”.
February 15th: New post about “Satellite Air Quality monitoring: Introduction to the NASA WorldView”.
February 8th: New post about “Visual recognising the Air Quality Index - a case applied to Hanoi”.
October 28th 2014: New post about “Android app. update: now with embedded map and wind forecast.”.
October 6th 2014: New post about “Clean Air Initiative and the Better Air Quality Conference 2014”.
October 6th 2014: This 2014 international Better Air Quality Conference pre-program is now announced. Check out the program here.
September 6th 2014: New post about “Australian Air Quality: Comparison with the US EPA AQI scale.”.
August 1st 2014: New post about “Haier air box: Can it provide any useful Air Quality information?”.
July 28th 2014: The Android application has been updated, and comes with many new features. Check out the details or just download it.
July 27th 2014: New post about “Android app. update: now with notifications and automatic location finder.”.
July 21st 2014: New post about “Windows Mobile Application now available from the Microsoft App-Store”.
July 21st 2014: The Windows Mobile 8 phone application is now available for download from the Microsoft Store. Check out the details
July 12th 2014: The aqicn plugins for Google Chrome and Firefox are now available for download from Google and Mozilla stores.
March 15th 2014: On Saturday March 29th, from 20:30 to 21:30, the aqicn.org team will join the the Global Earth Hour. During this time, the website will be inaccessible
December 28th 2013: New post about “Updated Android application 3.0 now available for download.”.
December 28th 2013: The Android application has been updated to version 3.0, and comes with many new features. Check out the details or just download it.
October 21st 2013: New post about “Dylos Air Particule Conter experiment maintenance.”.
September 9th 2013: New post about “Revised PM2.5 AQI breakpoints”.
September 8th 2013: New post about “Dylos Air Particule counter experimentation, part 1.”.
September 5th 2013: The AQI calculation formula has been updated for some of the countries in Asia. For more information, please check the FAQ entry about Revised PM2.5 AQI breakpoints.
June 25th 2013: New post about “Singapore PSI and PM2.5 AQI: Why is there a difference between the two readings?”.
June 23rd 2013: The Android Widget application for the whole Asia (incl. Singapore, Japan, Malaysia, Vietnam, India...) is now avaialble from the Google PlayStore.
June 22nd 2013: Singapore PM2.5 based AQI is now updated on a hourly basis. Thanks to Singapore National Environment Agency for making this happen.
If you wonder why PM2.5 AQI is so relevant compared to PM10 (since PSI is only using PM10 data), please check the article about why is PM2.5 often higher than PM10.
June 21st 2013: We apologize for the slow update those last 2 days, due to a huge web traffic increase, partly due to the Singapore smog from Indonesia.
In order to improve the situation, we have upgraded our front-end web server to a high-performance server.
June 4th 2013: We apologize for the service breaks during the last days (Monday 3rd and Saturday 1st). The problem is due to our backend server.
May 22nd 2013: Vietnam Air Quality information is now available for 3 cities: Hanoi (Hà Nội), Da Nang (Đà Nẵng) and Nha Trang (Khánh Hoà) .
May 20th 2013: New post about “Shenyang PM2.5 main AQI update: Comparative PM2.5 data for 3 measurement stations in Shenyang”.
May 20th 2013: Shenyang (沈阳) Air Quality information is now based on 3 stations. More information available in the faq.
May 11th 2013: The city geo-location system (i.e. city position on the map) has been updated to take into account a growing number of cities.
In case you notice any issue with the geo-location, such as any city wrongly located on the map, please inform us.
May 6th 2013: The Air Quality data information for Japan is progressively going back to normal. If you notice any issue, please contact us.
February 7th 2013: New post about “Air Quality Designation: Update to the EPA AirNow standard”.
February 3rd 2013: New post about “Can masks really filter the particulate matter as small as PM2.5?”.
February 2nd 2013: New post about “Why is PM2.5 often higher than PM10? Is PM10 still a relevant measure?”.
January 19th 2013: New post about “Shanghai PM2.5 main AQI update: Comparative PM2.5 data for 3 measurement stations in Shanghai”.
January 19th 2013: Shanghai main AQI data is now based on the maximum of the PM2.5 AQI readings for the 3 stations Shanghai US Consulate (上海美国总领事馆),
Jingan (静安监测站) and Shanghai Normal College Primary Division (上海师范专科学校附属小学) (Same as for Beijing, Guangzhou and Chengdu; done to minimize maintenance downtime)
If you want to compare the relative AQI readings for those 3 stations, consult the FAQ section
January 12th 2013: PM2.5 data is available for 11 new cities (Taiyuan, Huhehaote, Shenyang, Hefei, Fuzhou, Zhengzhou, Changsha, Nanning, Haikou, Lhasa, Wulumuqi)
January 11th 2013: New post about “Chengdu PM2.5 main AQI update: Comparative PM2.5 data for 2 measurement stations in Chengdu”.
January 11th 2013: Chengdu main AQI data is now based on the maximum of the PM2.5 AQI readings for the 2 stations Chengdu US Consulate (成都美国总领事馆)
and Caotang Temple, Chengdu (成都草堂寺) (Same as for Beijing and Guangzhou; done to prevent from the 'no reading downtime')
January 8th 2013: PM2.5 data is available for 12 new cities (Chongqing, Tianjin, Xian, Dalian, Xiamen, Haerbin, Nanchang, Changchun, Kunming, Xining, Lanzhou, Yinchuan)
December 30th 2012: Guangzhou main AQI data is now based on the maximum of the PM2.5 AQI readings for the 2 stations
Guangzhou US Consulate (美国领事馆 - 广州 中国) and Lìwān xicūn, Guangzhou (广州荔湾西村) (Same as for Beijing; done to prevent from the 'no reading downtime')
December 29th 2012: PM2.5 real time data hourly is now avaialble Shandong province and Zhenjiang province
December 28th 2012: Since the Beijing US embassy PM2.5 is having 'no-reading' issues, the Beijing AQI data is now based on the maximum of the PM2.5 AQI readings for the 3 stations
Beijing US Embassy (北京美国大使馆), Dongcheng Dongsi (东城东四) and Chaoyang Agricultural Exhibition Hall (朝阳农展馆).
If you only want to view the PM2.5 US embassy data, then use this link. If you want to compare the relative AQI readings for those 3 stations, consult the FAQ section
December 8th 2012: We are looking for help to improve the translations for Chinese, Cantonese, Korean, Russian and Japanese, as well as create tranlations for new languages.
If you can help for those translations, please contact us at this link.
December 6th 2012: PM2.5 real time data hourly is now avaialble Hebei province (38 places), Guangdong province (63 places), Jiangsu province (17 places),
November 18th 2012: PM2.5 real time data hourly is now avaialble for Wuhan, Ningbo and Shanghai
October 7th 2012: The MEP PM10, NO2 and SO2 convertion formula from µg/m3 to AQI level has been updated to follow EPA standards.
September 18th 2012: PM2.5 real time data hourly is now avaialble for Beijing, Hong Kong and Shenzhen
Beijing, Shanghai, Guangzhou, Chengdu Air Pollution Indexes are now based the US Embassy real time twitter feeds.
March 15th 2012: The Beijing AmCham is organizing a session on 'Air Pollution and Health: What You Can Do to Minimize Risk?' on Thursday March 21st 2013. More information available here.
March 11th 2012: We apologize for the service break which happened from Sunday 23PM until today, Monday, 9PM. This break was due to our web hosting provider.
February 21st 2012: Our new back-end server roll-out is started - with the objective to improve the incoming traffic bandwidth. If you notice any strange issue, please contact us.
February 7th 2012: The Air Quality Designation is now updated to follow the EPA standard. Check the FAQ for more information...
February 3rd 2012: 2 new entries posted in the faq section about Why is PM2.5 often higher than PM10 and Can masks really filter PM2.5 particles?.
A problem has also been fixed in the server which prevented some of the android widgets from beeing updated. If you still see some problems with the Android widgets, please contact us.
view all the past news, or check the frequently asked questions.