空氣汙染指數, 你會讀嗎？

簡單的講，就象高考標準分（倒過來）：

最低0分，空氣完美；
100分，空氣一般（正好達標，但標準是人定的，因時間而異，因國家而異,  美國趨勢是往下修訂）；
最高500分，空氣糟透了。

AQI是對每種汙染物而異。

AQI PM10;  

AQI PM2.5;

AQI NOx;

AQI SOx;

AQI CO;

AQI O3.  

關於霧霾全麵論述看:
WXC blog
 http://blog.wenxuecity.com/myblog/68594/201503/10782.html

Or

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我在博客發表了一篇文章：柴靜沒有回答的問題，我來試試(二)

 http://blog.sciencenet.cn/blog-2470641-873291.html  

此文來自科學網洪建輝博客
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空氣汙染指數, 英文縮寫：AQI, Air Quality Index，可分六檔 (中國版)
0-50： 空氣質量I級，優，無汙染
51-100： 空氣質量Ⅱ級，良，對健康無危害
101-200：空氣質量Ⅲ⑴級和Ⅲ⑵級，輕微汙染和輕度汙染，對敏感人群有危害
201-300：空氣質量Ⅳ⑴級和Ⅳ⑵級，中度和中度重汙染。對健康有比較嚴重的影響
超過300：空氣質量V級，重度汙染。所有人的健康都會受到嚴重影響

 

美國版:

http://www.epa.gov/airnow/aqi_brochure_02_14.pdf

 

Each category corresponds to a different level of health concern:

• Good. The AQI value for your community is between

0 and 50. Air quality is satisfactory and poses little or no

health risk.

• Moderate. The AQI is between 51 and 100. Air quality

is acceptable; however, pollution in this range may pose a

moderate health concern for a very small number of individuals.

People who are unusually sensitive to ozone or

particle pollution may experience respiratory symptoms.

• Unhealthy for Sensitive Groups. When AQI values

are between 101 and 150, members of sensitive groups

may experience health effects, but the general public is

unlikely to be affected.

• Ozone: People with lung disease, children, older adults,

and people who are active outdoors are considered

sensitive and therefore at greater risk.

• Particle pollution: People with heart or lung disease,

older adults,1 and children are considered sensitive and

therefore at greater risk.

• Unhealthy. Everyone may begin to experience health effects

when AQI values are between 151 and 200. Members of

sensitive groups may experience more serious health effects.

• Very Unhealthy. AQI values between 201 and 300

trigger a health alert, meaning everyone may experience

more serious health effects.

• Hazardous. AQI values over 300 trigger health warnings

of emergency conditions. The entire population is even

more likely to be affected by serious health effects.