Air quality in Princeton
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
7.7 µg/m³
WHO guideline 15
PM10
9.7 µg/m³
WHO guideline 45
Hour by hour (12h)
US EPA AQI
9:00 AM
💨
PM2.5 7.7 µg/m³
32Good
10:00 AM
💨
PM2.5 8.5 µg/m³
40Good
11:00 AM
💨
PM2.5 9.7 µg/m³
49Good
12:00 PM
💨
PM2.5 10.6 µg/m³
76Moderate
1:00 PM
💨
PM2.5 10.9 µg/m³
98Moderate
2:00 PM
💨
PM2.5 10.8 µg/m³
101Unhealthy for Sensitive Groups
3:00 PM
💨
PM2.5 10.5 µg/m³
96Moderate
4:00 PM
💨
PM2.5 9.6 µg/m³
86Moderate
5:00 PM
💨
PM2.5 10 µg/m³
73Moderate
6:00 PM
💨
PM2.5 9.2 µg/m³
55Moderate
7:00 PM
💨
PM2.5 8.4 µg/m³
47Good
8:00 PM
💨
PM2.5 8.1 µg/m³
42Good
Next few days
daily max · US EPA AQI
Fri
💨
Unhealthy for Sensitive Groups · UV Very high
101
Sat
💨
Moderate · UV Very high
85
Sun
💨
Moderate · UV Very high
83
Mon
💨
Moderate · UV Very high
98
Tue
💨
Good · UV Very high
38