Air quality in Napa
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
17.2 µg/m³
WHO guideline 15
PM10
20.8 µg/m³
WHO guideline 45
Hour by hour (12h) US EPA AQI
9:00 AM
💨
PM2.5 17.2 µg/m³
62 Moderate
10:00 AM
💨
PM2.5 12.4 µg/m³
52 Moderate
11:00 AM
💨
PM2.5 7.6 µg/m³
34 Good
12:00 PM
💨
PM2.5 6 µg/m³
38 Good
1:00 PM
💨
PM2.5 5.9 µg/m³
40 Good
2:00 PM
💨
PM2.5 6.7 µg/m³
42 Good
3:00 PM
💨
PM2.5 8.1 µg/m³
44 Good
4:00 PM
💨
PM2.5 9.6 µg/m³
45 Good
5:00 PM
💨
PM2.5 11.1 µg/m³
46 Good
6:00 PM
💨
PM2.5 12 µg/m³
50 Good
7:00 PM
💨
PM2.5 12.7 µg/m³
52 Moderate
8:00 PM
💨
PM2.5 13.6 µg/m³
54 Moderate
Next few days daily max · US EPA AQI
Mon
💨
Moderate · UV Moderate
70
Tue
💨
Moderate · UV Moderate
60
Wed
💨
Moderate · UV Moderate
57
Thu
💨
Moderate · UV Moderate
58
Fri
💨
Moderate · UV Very high
51
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Precip NEXRAD · NOAA Temp Wind Clouds Terrain