Air quality index United States United States

| C_low_ | C_high_ | I_low_ | I_high_ | Category |
|---|---|---|---|---|
| 0 | 12.0 | 0 | 50 | Good |
| 12.1 | 35.4 | 51 | 100 | Moderate |
| 35.5 | 55.4 | 101 | 150 | Unhealthy for Sensitive Groups |
| 55.5 | 150.4 | 151 | 200 | Unhealthy |
| 150.5 | 250.4 | 201 | 300 | Very Unhealthy |
| 250.5 | 350.4 | 301 | 400 | Hazardous |