Research Article
Research on Influential Factors of PM2.5 within the Beijing-Tianjin-Hebei Region in China
Table 3
Environmental status of the BTH region in 2015.
| | Item | Beijing | Tianjin | Hebei | China average |
| | PM10 annual average (μg/m3) | 101.5 | 116 | 136 | 87 | | PM2.5 annual average (μg/m3) | 80.6 | 70 | 77 | 50 | | NO2 annual average (μg/m3) | 50 | 42 | 46 | 30 | | SO2 annual average (μg/m3) | 22 | 29 | 41 | 25 | | O3 annual average (μg/m3) | 202.6 | 142 | 160 | 134 | | CO annual average (mg/m3) | 3.6 | 3.1 | 3.7 | 2.1 |
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