| Month | Monthly mean PM2.5 concentrations and standard deviations (μg·m−3) | |||||||||
| Residences no inversion | Residences SBI | Frame houses no inversions | Frame houses SBI | Cabins no inversion | Cabins SBI | Office/commercial buildings no inversion | Office/ commercial buildings SBI | |||
| April | 123.1 ± 37.6 | 256.3 ± 53.8 | 226.6 ± 31.4 | 491.3 ± 56.5 | 2.3 ± 1.0 | 28.3 ± 6.6 | 28.7 ± 9.0 | 5.2 ± 1.8 | ||
| May | 143.9 ± 14.9 | 228.4 ± 31.2 | 214.6 ± 32.8 | 325.9 ± 47.9 | 5.6 ± 0.8 | 137.7 ± 15.7 | 5.6 ± 0.8 | 12.4 ± 1.5 | ||
| June | 123.7 ± 12.4 | 197.0 ± 16.6 | 153.1 ± 16.6 | 244.5 ± 21.2 | 54.5 ± 9.1 | 89.7 ± 13.6 | 227.0 ± 122.4 | 351.2 ± 156.0 | ||
| July | 98.7 ± 10.0 | 168.6 ± 21.4 | 90.8 ± 13.0 | 186.1 ± 26.6 | 104.0 ± 12.0 | 170.3 ± 24.0 | 1677.5 ± 357.0 | 3390.9 ± 851.8 | ||
| August | -.- | 277.2 ± 57.9 | -.- | 425.4 ± 54.0 | -.- | 51.7 ± 8.2 | -.- | 4019.7 ± 983.0 | ||