Shanghai PM2.5 main AQI update: Comparative PM2.5 data for 3 measurement stations in Shanghai

Posted on January 19th 2013
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Shanghai AQI data is now based on the maximum PM2.5 AQI data for 3 stations: 上海美国总领事馆 (Shanghai US Consulate), 静安监测站 (Jingan)
and 上海师范专科学校附属小学 (Shanghai Normal College Primary Division).

The first station is maintained by US Consulate in Shanghai, while the two last ones are provided by Shanghai Environment Monitoring Center(上海市环境监测中心), which is governmental center.

If you have concerns about some stations reporting lower PM2.5 data compared to others, then refer to the following graphics; they show the relative PM2.5 reporting for the last 5 days for each of the above mentioned stations:

Shanghai AQI data is now based on the maximum PM2.5 AQI data for 3 stations: 上海美国总领事馆 (Shanghai US Consulate), 静安监测站 (Jingan)
and 上海师范专科学校附属小学 (Shanghai Normal College Primary Division).

The first station is maintained by US Consulate in Shanghai, while the two last ones are provided by Shanghai Environment Monitoring Center(上海市环境监测中心), which is governmental center.

If you have concerns about some stations reporting lower PM2.5 data compared to others, then refer to the following graphics; they show the relative PM2.5 reporting for the last 5 days for each of the above mentioned stations:

上海美国总领事馆 (Shanghai US Consulate) PM2.5 AQI reported by Shanghai US consulate上海上海美国总领事馆 PM25 (小粒子状物質)  measured by U.S. Consulate Shanghai Air Quality Monitor.
Values are converted to the US EPA AQI standard.
上海师范专科学校附属小学 (Shanghai Normal College Primary Division) PM2.5 AQI reported by Shanghai MEP上海上海师范专科学校附属小学 PM25 (小粒子状物質)  measured by Shanghai Environment Monitoring Center(上海市环境监测中心).
Values are converted to the US EPA AQI standard.
静安监测站 (Jingan) PM2.5 AQI reported by Shanghai MEP上海静安监测站 PM25 (小粒子状物質)  measured by Shanghai Environment Monitoring Center(上海市环境监测中心).
Values are converted to the US EPA AQI standard.

As you can see, the reality is that Shanghai Environmental Protection Center and Shanghai US Consulate PM2.5 data is similar. And actually, in many case, the raw µg/m3 PM2.5 data reported by China MEP (China Ministry of Environmental Protection, to which Shanghai EP Center is reporting data) is actually higher than what is reported by the US consulate.

Some of the readers might be surprised since other apps (like the famous Dirty Beijing) are known to "highlight" lower AQI measured by MEP compared to the US data. The reason is that they do not use the same PM2.5 µg/m3 to AQI convertion for MEP and US data, meaning that they are comparing apple and bananas.

In this web site, all pollutant data (PM2.5, PM10, NO2, SO2, CO, O3) are converted from µg/m3 to AQI using the same convertion formula, which is the official EPA (US Environment Protection Agency) (revision from 2011, which is much more stict than the 2006 one; sorry no we cannot find the link to this revision). Only usign this unique convertion formula, it makes sense to compare the AQI data.

So, now, you might ask what is the trick with the MEP data? Well, it is just that the US EPA convertion formula is much more strict than others (and even more for the 2011 one), especially for AQI values below 150. So, if you look at the raw PM2.5 µg/m3 data, values are very much similar between US and MEP. But if you look at the AQI converted values , then, yes, China MEP based convertion formula AQI values are lower than the US EPA based convertion formula AQI values. But no worry, this site only uses the US EPA convertion formula, so regarless of which center is reporting the PM2.5 µg/m3 data, you will always get the safe AQI measurement based on the US Environment Protection Agency.

(中文版请点击此处 )


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    空気の質と大気汚染指数で

    大気品質レベルについて

    指数大気質指数の分類(米国)健康影響 / カテゴリ粒子状物質(PM10,PM2.5)
    0 - 50良い - Good通常の活動が可能なし
    51 -100並 - Moderate特に敏感な者は、長時間又は激しい屋外活動の減少を検討非常に敏感な人は、長時間または激しい活動を減らすよう検討する必要がある。
    101-150敏感なグループにとっては健康に良くない - Unhealthy for Sensitive Groups心臓・肺疾患患者、高齢者及び子供は、長時間又は激しい屋外活動を減少心疾患や肺疾患を持つ人、高齢者、子供は、長時間または激しい活動を減らす必要がある。
    151-200健康に良くない - Unhealthy上記の者は、長時間又は激しい屋外活動を中止
    すべての者は、長時間又は激しい屋外活動を減少
    心疾患や肺疾患を持つ人、高齢者、子供は、長時間または激しい活動を中止する必要がある。それ以外の人でも、長時間または激しい活動を減らす必要がある。
    201-300極めて健康に良くない - Very Unhealthy上記の者は、すべての屋外活動を中止
    すべての者は、長時間又は激しい屋外活動を中止
    心疾患や肺疾患を持つ人、高齢者、子供は、全ての屋外活動を中止する必要がある。それ以外の人でも、長時間または激しい活動を中止する必要がある。
    300+危険 - Hazardous上記の者は、屋内に留まり、体力消耗を避ける
    すべての者は、屋外活動を中止
    全ての人が屋外活動を中止する必要がある。特に、心疾患や肺疾患を持つ人、高齢者、子供は、屋内に留まって激しい活動を避け静かに過ごす必要がある。
    (Reference: see wikipedia,and cn.emb-japan.go.jp/)

    あなたは空気の質や汚染についての詳細をお知りになりたい場合は、WikipediaAirNowを参照してください。

    北京の医者Richard Saint Cyrの非常に便利な健康アドバイスについては、 www.myhealthbeijing.com をチェックしてください。


    Usage Notice: All the Air Quality data are unvalidated at the time of publication, and due to quality assurance these data may be amended, without notice, at any time. The World Air Quality Index project has exercised all reasonable skill and care in compiling the contents of this information and under no circumstances will the World Air Quality Index project team or its agents be liable in contract, tort or otherwise for any loss, injury or damage arising directly or indirectly from the supply of this data.



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    Temperature unit:
    Celcius