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
9.7 µg/m³
WHO guideline 15
PM10
10 µg/m³
WHO guideline 45
Hour by hour (12h)
US EPA AQI
8:00 AM
💨
PM2.5 9.7 µg/m³
40Good
9:00 AM
💨
PM2.5 8.9 µg/m³
37Good
10:00 AM
💨
PM2.5 8.3 µg/m³
41Good
11:00 AM
💨
PM2.5 8.3 µg/m³
47Good
12:00 PM
💨
PM2.5 9.5 µg/m³
60Moderate
1:00 PM
💨
PM2.5 10.9 µg/m³
85Moderate
2:00 PM
💨
PM2.5 11.7 µg/m³
99Moderate
3:00 PM
💨
PM2.5 11.8 µg/m³
108Unhealthy for Sensitive Groups
4:00 PM
💨
PM2.5 11.1 µg/m³
110Unhealthy for Sensitive Groups
5:00 PM
💨
PM2.5 10.8 µg/m³
103Unhealthy for Sensitive Groups
6:00 PM
💨
PM2.5 10.9 µg/m³
88Moderate
7:00 PM
💨
PM2.5 11 µg/m³
65Moderate
Next few days
daily max · US EPA AQI
Fri
💨
Unhealthy for Sensitive Groups · UV High
110
Sat
💨
Moderate · UV High
73
Mon
💨
Moderate · UV High
65