Australian Air Quality: Comparison with the US EPA AQI scale.

Posted on September 6th 2014
Share: aqicn.org/faq/2014-09-06/australian-air-quality-comparison-with-the-us-epa-aqi-scale

The Air Quality data for Perth and Western Australia is finally available after a long waiting time: The department of Environmental Regulation (DER) from the governement of Western Australia, is now publishing the data on their site: der.wa.gov.au/your-environment/air. While the link to the DEC site is still not working, the feed can be accessed from this new page .

However, unlike the other territories in Australia, WA DER is not providing the readings in raw ppm and µg/m3, but directly in AQI. The AQI scale used by the WA DER is not the same as the one from the US EPA, which we are using for all the stations reported on the World Air Quality Index project. So this aim of the FAQ entry is to explain how the convertion between the two AQI scales is done.

oOo

The WA DER AQI scale is based on the "National Environment Protection (Ambient Air Quality) Measure standards and goals" (available form this link and this other link), which is defined in the table below. Based on this standard, it is possible to deduct the raw readings from the AQI, which is indicated by the last column in the table;

PollutantAveraging period Maximum concentrationRaw data convertion formula
Fine Particles (PM2.5)1 day25µg/m3 Mass = AQI*25/100 (µg/m3)
Respirable Particles (PM10)1 day50µg/m3 Mass = AQI*50/100 (µg/m3)
Carbon monoxide (CO)8 hours9.0ppm Count = AQI*9.0/100 (ppm)
Nitrogen dioxide (NO2)1 hour0.12ppm Count = AQI*0.12/100 (ppm)
1 year0.03ppm
Sulfur dioxide (SO2)1 hour0.20ppm Count = AQI*0.20/100 (ppm)
1 day0.08ppm
1 year0.02ppm
Photochemical oxidants
(Ozone, O3)
1 hour0.10ppm Count = AQI*0.10/100 (ppm)
4 hours0.08ppm
Lead1 year0.50µg/m3 n/a

Actually, surprisingly enough, the WA DER AQI scale is much more strict than the US EPA when the AQI is above 50! Check for this comparitive tables for PM2.5:

微颗粒物重量10 µg/m320 µg/m330 µg/m340 µg/m350 µg/m360 µg/m370 µg/m380 µg/m390
         
WA DER
Standard:
0..5050..100100..150150..200200..300300.....
         
US EPA
Standard:
0..5050..100100..150150..200

And this comparison is for the PM10:

微颗粒物重量20 µg/m340 µg/m360 µg/m380 µg/m3100 µg/m3120 µg/m3140 µg/m3160 µg/m3180
         
WA DER
Standard:
0..5050..100100..150150..200200..300300.....
         
US EPA
Standard:
0..5050..100100..150


For now, we will keep the using the US EPA standard, simply because it is the one we use for the overall Australia.

We will also post an update soon (by October 2014), once we have gathered more data, to do more comparison of those 2 scales. We currently assume that the Air Quality in Western Australia is not just the same as in Chinam, where AQI above 200 is common, and that AQI below 50 should be the norm, in which case the PM2.5 reported AQI should be similar for both scales (assuming that PM2.5 is the major pollutant). But for now, those are all assumptions, so let's see in one month one enough data is available.


--

Note: This article is part of a series on Worlwide Air Quality scales.

For more information about specific countries or continent, please refer to thoses articles:
Thailand and Malysia
-
India
-
China
-
Hong Kong / Canada (Air Quality Health Index)
-
South America
-
Australia
-
Quebec and Montreal
-
Singapore
-
Poland
-
Indonesia
.
For information about the 24 hours averaging used or Ozone and Particulate Matter (PM2.5), please refer to those two articles: Ground Ozone Index - PM2.5 Instant Cast


Click here to see all the FAQ entries
  • Nitrogen Dioxyde (NO2) in our atmosphere
  • Ozone AQI Scale update
  • Kriging Interpolation




  • comments powered by Disqus

    關於空氣質量與空氣污染指數

    本網站採用的污染指數和顏色與EPA是完全相同的。 EPA的指數可以從 AirNow上查到

    空气质量指数空气质量指数级别(状况)及表示颜色对健康影响情况建议采取的措施
    0 - 50一级(优)空气质量令人满意,基本无空气污染各类人群可正常活动
    51 -100二级(良)空气质量可接受,但某些污染物可能对极少数异常敏感人群健康有较弱影响极少数异常敏感人群应减少户外活动
    101-150三级(轻度污染)易感人群症状有轻度加剧,健康人群出现刺激症状儿童、老年人及心脏病、呼吸系统疾病患者应减少长时间、高强度的户外锻炼
    151-200四级(中度污染)进一步加剧易感人群症状,可能对健康人群心脏、呼吸系统有影响儿童、老年人及心脏病、呼吸系统疾病患者避免长时间、高强度的户外锻炼,一般人群适量减少户外运动
    201-300五级(重度污染)心脏病和肺病患者症状显著加剧,运动耐受力降低,健康人群普遍出现症状儿童、老年人及心脏病、肺病患者应停留在室内,停止户外运动,一般人群减少户外运动
    300+六级(严重污染)健康人群运动耐受力降低,有明显强烈症状,提前出现某些疾病儿童、老年人和病人应停留在室内,避免体力消耗,一般人群避免户外活动
    (参考详见http://zh.wikipedia.org/wiki/空气质量指数)

    如果你想了解更多有關空氣質量與污染,詳見維基百科或者 AirNow

    有關健康建議詳​​見北京的Richard Saint Cyr MD醫生的博客:www.myhealthbeijing.com


    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.



    設定


    選擇語言:


    Temperature unit:
    Celcius