Table 2.
Distribution of Air Pollution Variables (Warm Season: April–September; Cold Season: October–March) in New York City, 2002–2006
| 5% | 25% | 50% | 75% | 95% | |
| PM2.5, μg/m3 | |||||
| All year | 5 | 8 | 12 | 18 | 30 |
| Warm | 5 | 8 | 12 | 19 | 31 |
| Cold | 5 | 7 | 12 | 17 | 28 |
| O3, ppb | |||||
| All year | 7 | 18 | 28 | 40 | 67 |
| Warm | 20 | 31 | 40 | 51 | 75 |
| Cold | 4 | 12 | 19 | 26 | 35 |
| NO2, ppb | |||||
| All year | 15 | 21 | 27 | 32 | 43 |
| Warm | 14 | 20 | 26 | 31 | 42 |
| Cold | 17 | 23 | 28 | 34 | 44 |
| SO2, ppb | |||||
| All year | 2.0 | 3.8 | 6.3 | 9.6 | 18.0 |
| Warm | 1.8 | 3.0 | 4.2 | 6.0 | 8.8 |
| Cold | 3.6 | 6.6 | 9.3 | 13.2 | 21.6 |
| CO, ppm | |||||
| All year | 0.6 | 0.7 | 0.9 | 1.0 | 1.5 |
| Warm | 0.6 | 0.7 | 0.8 | 1.0 | 1.3 |
| Cold | 0.6 | 0.7 | 0.9 | 1.1 | 1.6 |
Abbreviations: CO, carbon monoxide; NO2, nitrogen dioxide; O3, ozone; PM2.5, particulate matter of aerodynamic diameter <2.5 μm; SO2, sulfur dioxide.