Air quality in Holyrood
The US Air Quality Index (EPA) grades air from 0 to 500 using fine particles (PM2.5/PM10), ozone and nitrogen dioxide. 0-50 is Good, 51-100 Moderate, 101-150 Unhealthy for Sensitive Groups, and anything higher affects everyone.
PM2.5
8.1 µg/m³
WHO guideline 15
PM10
8.5 µg/m³
WHO guideline 45
Hour by hour (12h)
US EPA AQI
1:00 AM
💨
PM2.5 8.1 µg/m³
34Good
2:00 AM
💨
PM2.5 8.2 µg/m³
34Good
3:00 AM
💨
PM2.5 8.4 µg/m³
35Good
4:00 AM
💨
PM2.5 8.5 µg/m³
35Good
5:00 AM
💨
PM2.5 8.7 µg/m³
36Good
6:00 AM
💨
PM2.5 8.8 µg/m³
37Good
7:00 AM
💨
PM2.5 8.6 µg/m³
36Good
8:00 AM
💨
PM2.5 6.9 µg/m³
29Good
9:00 AM
💨
PM2.5 6.8 µg/m³
28Good
10:00 AM
💨
PM2.5 5.7 µg/m³
24Good
11:00 AM
💨
PM2.5 3.4 µg/m³
23Good
12:00 PM
💨
PM2.5 2.5 µg/m³
24Good
Next few days
daily max · US EPA AQI
Wed
💨
Good · UV Moderate
42
Fri
💨
Good · UV Moderate
34