Air quality in Portsmouth
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
8.9 µg/m³
WHO guideline 15
PM10
9.1 µg/m³
WHO guideline 45
Hour by hour (12h)
US EPA AQI
9:00 AM
💨
PM2.5 8.9 µg/m³
37Good
10:00 AM
💨
PM2.5 9.6 µg/m³
46Good
11:00 AM
💨
PM2.5 9.1 µg/m³
66Moderate
12:00 PM
💨
PM2.5 8.1 µg/m³
83Moderate
1:00 PM
💨
PM2.5 7 µg/m³
91Moderate
2:00 PM
💨
PM2.5 5.9 µg/m³
95Moderate
3:00 PM
💨
PM2.5 5.3 µg/m³
95Moderate
4:00 PM
💨
PM2.5 5 µg/m³
91Moderate
5:00 PM
💨
PM2.5 4.9 µg/m³
81Moderate
6:00 PM
💨
PM2.5 4.8 µg/m³
63Moderate
7:00 PM
💨
PM2.5 5.5 µg/m³
47Good
8:00 PM
💨
PM2.5 6.2 µg/m³
42Good
Next few days
daily max · US EPA AQI
Sat
💨
Moderate · UV High
95
Sun
💨
Moderate · UV Moderate
70
Tue
💨
Moderate · UV High
73
Wed
💨
Good · UV Very high
40