Table 2 PM2.5 levels and air quality index values in Jiang, China, from 2013 to 2015.
From: Short-term effects of different PM2.5 ranges on daily all-cause mortality in Jinan, China
PM2.5 levels (μg/m3) | 2013 | 2014 | 2015 | Air quality index values | MEP air quality | Category | |||
|---|---|---|---|---|---|---|---|---|---|
N | (%) | N | (%) | N | (%) | ||||
≤ 35 | 12 | 3.3 | 9 | 2.5 | 24 | 6.6 | ≤ 50 | Good | Green |
36–75 | 116 | 31.8 | 150 | 41.1 | 154 | 42.2 | 51–100 | Moderate | Yellow |
76–115 | 119 | 32.6 | 125 | 34.2 | 109 | 29.9 | 101–150 | Poor for sensitive groups | Orange |
116–150 | 48 | 13.1 | 44 | 12.1 | 44 | 12.0 | 151–200 | Poor | Red |
> 150 | 70 | 19.2 | 37 | 10.1 | 34 | 9.3 | > 200 | Very poor | Purple |
