The World AQI Indices are based on the US EPA (United States Environmental Protection Agency) Scale, latest 24 hour running mean for the current day.
| WORLD (US EPA) AQI PM2.5 |
Good |
Moderate |
Unhealthy for Sensitive Groups |
Unhealthy |
Very Unhealthy |
Hazardous |
| Range |
0-50 |
51-100 |
101-150 |
151-200 |
201-300 |
300 |
| µg/m³ |
0-12 |
12-35 |
35-55 |
55-150 |
150-250 |
250 |
The Defra (UK Government Department for Environment and Rural Affairs) DAQI Indices are based on the daily mean concentration for historical data, latest 24 hour running mean for the current day.
| UK DAQI |
Low |
Low |
Low |
Moderate |
Moderate |
Moderate |
High |
High |
High |
Very High |
| Band |
1 |
2 |
3 |
4 |
5 |
6 |
7 |
8 |
9 |
10 |
| PM2.5 µg/m³ |
0-11 |
12-23 |
24-35 |
36-41 |
42-47 |
48-53 |
54-58 |
59-64 |
65-70 |
71 or more |
| PM10 µg/m³ |
0-16 |
17-33 |
34-50 |
51-58 |
59-66 |
67-75 |
76-83 |
84-91 |
92-100 |
101 or more |