China AQI for PM2.5
Published by China's Ministry of Ecology and Environment (standard HJ 633-2012). China's official index, reported by the national monitoring centre and every city's environment bureau.
China's Air Quality Index (HJ 633-2012), PM2.5 individual index. Show SmogRank's numbers in China AQI; you can change it under any chart.
Convert a reading
Try 15.0 µg/m³ (the WHO's 24-hour guideline) or 101.2 µg/m³ (Singapore over the last 24 hours).
Its bands
Excellent
China AQI 0–50 · up to 35.0 µg/m³
Everyone can go about the day as usual.
Takes in the WHO's 24-hour guideline (15 µg/m³).
Good
China AQI 51–100 · over 35.0 to 75.0 µg/m³
Acceptable; a few unusually sensitive people are advised to do less outdoors.
Over the WHO's 24-hour guideline (15 µg/m³) all the way.
Lightly polluted
China AQI 101–150 · over 75.0 to 115.0 µg/m³
Children, older adults and people with heart or lung disease are advised to cut long or hard outdoor effort.
Over the WHO's 24-hour guideline (15 µg/m³) all the way.
Moderately polluted
China AQI 151–200 · over 115.0 to 150.0 µg/m³
Those groups are advised to avoid long or hard outdoor effort, and everyone else to do less outdoors.
Over the WHO's 24-hour guideline (15 µg/m³) all the way.
No measured city in this band on the 24-hour board now.
Heavily polluted
China AQI 201–300 · over 150.0 to 250.0 µg/m³
Symptoms grow in people with heart or lung disease and show in healthy people; sensitive groups are advised to stay indoors.
Over the WHO's 24-hour guideline (15 µg/m³) all the way.
No measured city in this band on the 24-hour board now.
Severely polluted
China AQI 301+ · over 250.0 µg/m³
Healthy people may tire sooner and feel clear symptoms; everyone is advised to stay off outdoor activity.
Over the WHO's 24-hour guideline (15 µg/m³) all the way.
No measured city in this band on the 24-hour board now.
The meanings above are ours, in short. The publisher's own advice for each band: China's Ministry of Ecology and Environment (standard HJ 633-2012).
Each scale here is its PM2.5 part only. Official indexes take the worst of several pollutants, so a city's official number can be higher. The scales are defined on 24-hour means (AQHI+ on hourly ones); how we use them.
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Nothing on SmogRank is medical advice. For health guidance during bad air, follow your local health authority.