| Air Quality Rating | PM2.5 24-hour Average (micrograms/m3) | PM2.5 8-hour Average (micrograms/m3) | PM2.5 1-hour Concentration (micrograms/m3) | Visibility (miles)9 |
| GOOD | 0.0-15.4 |
0.0-17.1 |
0.0-20.0 |
20+ |
| MODERATE |
15.5-25.4 |
17.2-30.0 |
20.1-40.0 |
10-19 |
|
UNHEALTHY for
Sensitive Groups (UFSG) |
25.5-35.4 |
30.0-50.0 |
40.1-94.2 |
5-9 |
| UNHEALTHY |
35.5-46.4 |
50.0-65.7 |
94.3-120.0 |
3-4 |
| VERY UNHEALTHY |
46.5-100.4 |
65.7-143.0 | 120.0-250.0 | 1-2 |
| HAZARDOUS |
>100.4 |
>143.0 |
>250.0 |
<1 |