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
7.6 µg/m³
WHO guideline 15
PM10
9.5 µg/m³
WHO guideline 45
Hour by hour (12h)
US EPA AQI
2:00 PM
💨
PM2.5 7.6 µg/m³
61Moderate
3:00 PM
💨
PM2.5 7 µg/m³
61Moderate
4:00 PM
💨
PM2.5 6.7 µg/m³
60Moderate
5:00 PM
💨
PM2.5 6.7 µg/m³
56Moderate
6:00 PM
💨
PM2.5 7 µg/m³
48Good
7:00 PM
💨
PM2.5 7.5 µg/m³
48Good
8:00 PM
💨
PM2.5 8.3 µg/m³
45Good
9:00 PM
💨
PM2.5 9.7 µg/m³
44Good
10:00 PM
💨
PM2.5 10.7 µg/m³
45Good
11:00 PM
💨
PM2.5 10.9 µg/m³
45Good
12:00 AM
💨
PM2.5 10.9 µg/m³
45Good
1:00 AM
💨
PM2.5 10 µg/m³
42Good
Next few days
daily max · US EPA AQI
Sun
💨
Moderate · UV Moderate
66
Tue
💨
Moderate · UV High
58
Wed
💨
Good · UV Very high
45
Thu
💨
Good · UV Very high
27