Table 1.
Summary of geographic regions.
| Region | [PM2.5] (μg/m3) | Number of Measurements | % Above Annual Limit 1 | % Above 24-h Limit 2 |
|---|---|---|---|---|
| Northeastern | 66.50 ± 27.96 | 61 | 91.80% | 34.43% |
| Northern | 76.10 ± 38.69 | 53 | 100% | 50.94% |
| Northwestern | 85.41 ± 59.19 | 42 | 100% | 14.29% |
| Eastern | 55.41 ± 18.16 | 121 | 86.78% | 20.66% |
| South Central | 50.23 ± 21.00 | 136 | 75.74% | 16.91% |
| Southwestern | 48.72 ± 13.63 | 51 | 90.20% | 11.76% |
| Beijing | 94.42 ± 23.83 | 98 | 100% | 77.55% |
| Taiwan | 30.49 ± 1.81 | 12 | 8.33% | 0% |
| Overall Average | 60.64 ± 33.27 | 574 | 87.80% | 32.06% |
1 Annual limit is 35 μg/m3. 2 24-h limit is 75 μg/m3.