Table 2.
Breakpoints values.
| O3 (ppb) | O3 (ppb) | PM2.5 (μg/m3) | PM10 (μg/m3) | CO (ppm) | SO2 (ppb) | NO2 (ppb) | AQI |
|---|---|---|---|---|---|---|---|
| Clow-Chigh(avg) | Clow-Chigh(avg) | Clow- Chigh(avg) | Clow-Chigh(avg) | Clow-Chigh(avg) | Clow-Chigh(avg) | Clow-Chigh(avg) | Ilow-Ihigh |
| 0-54 (8hr) | – | 0.0–12.0 (24hr) | 0-54 (24hr) | 0.0–4.4 (8hr) | 0-35 (1hr) | 0-53 (1hr) | 0–50 |
| 55-70 (8hr) | – | 12.1–35.4 (24hr) | 55-154 (24hr) | 4.5–9.4 (8hr) | 36-75 (1hr) | 54-100 (1hr) | 51–100 |
| 71-85 (8hr) | 125-164 (1hr) | 35.5–55.4 (24hr) | 155-254 (24hr) | 9.5–12.4 (8hr) | 76-185 (1hr) | 101-360 (1hr) | 101–150 |
| 86-105 (8hr) | 165-204 (1hr) | 55.5–150.4 (24hr) | 255-354 (24hr) | 12.5–15.4 (8hr) | 186-304 (1hr) | 361-649 (1hr) | 151–200 |
| 106-200 (8hr) | 205-404 (1hr) | 150.5–250.4 (24hr) | 355-424 (24hr) | 15.5–30.4 (8hr) | 305-604 (24hr) | 650-1249 (1hr) | 201–300 |
| – | 405-504 (1hr) | 250.5–350.4 (24hr) | 425-504 (24hr) | 30.5–40.4 (8hr) | 605-804 (24hr) | 1250-1649 (1hr) | 301–400 |
| – | 505-604 (1hr) | 350.5–500.4 (24hr) | 505-604 (24hr) | 40.5–50.4 (8hr) | 805-1004 (24hr) | 1650-2049 (1hr) | 401–500 |