| Critical Environment Classification (ISO 14644-1) | Concentration (particles/meter³) > or = Size Shown | |||
| {Sum} PM(0.1, 0.2 & 0.3)µm | PM0.5 µm | PM1.0µm | PM5.0µm | |
| 1 | 12 |
|
|
|
| 2 | 134 | 4 |
|
|
| 3 | 1,339 | 35 | 8 |
|
| 4 | 13,390 | 352 | 8 |
|
| 5 | 133,900 | 3,520 | 832 | 29 |
| 6 | 1,339,000 | 35,200 | 8,320 | 293 |
| 7 |
| 352,000 | 83,200 | 2,930 |
| 8 |
| 3,520,000 | 832,000 | 29,300 |
| 9 |
| 35,200,000 | 8,320,000 | 293,000 |