Stay updated with real-time air quality in Napa, California featuring accurate data on AQI, PM2.5, PM10, O3, NO2, SO2, and CO levels. Use our interactive map and detailed forecasts to monitor pollution trends, manage health risks, and plan your daily activities with confidence.
Live AQI (Air Quality Index)
33
Good
Napa, California
Last updated: ... (Local time)
Good
Fine
Moderate
Poor
Very poor
Hazardous
5.68 μg/m³
0
12.1
35.5
55.5
250.5
500.5+
25.42 μg/m³
0
55
155
255
425
605+
20.79 ppb
0
55
71
86
201
201+
0.52 ppb
0
36
76
186
605
1005+
2.70 ppb
0
54
101
361
1250
2050+
0.25 ppm
0
4.5
9.5
12.5
230.5
50.5+
Pollen Level
Low
Napa, California
Napa, California
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AQI 27
Good
4.83μg/m³
PM2.5
20.86μg/m³
PM10
20.15ppb
O3
0.41ppb
SO2
2.38ppb
NO2
0.29ppm
CO
AQI 22
Good
3.90μg/m³
PM2.5
22.94μg/m³
PM10
17.42ppb
O3
0.64ppb
SO2
3.12ppb
NO2
0.24ppm
CO
AQI 27
Good
5.44μg/m³
PM2.5
23.73μg/m³
PM10
20.93ppb
O3
0.31ppb
SO2
2.39ppb
NO2
0.30ppm
CO
AQI 27
Good
4.65μg/m³
PM2.5
18.99μg/m³
PM10
17.95ppb
O3
0.64ppb
SO2
3.21ppb
NO2
0.31ppm
CO
AQI 27
Good
4.65μg/m³
PM2.5
18.99μg/m³
PM10
17.95ppb
O3
0.64ppb
SO2
3.21ppb
NO2
0.31ppm
CO
AQI 27
Good
5.47μg/m³
PM2.5
23.79μg/m³
PM10
17.14ppb
O3
0.76ppb
SO2
3.42ppb
NO2
0.29ppm
CO
Air quality data and pollutant measurements for California, USA adhere to strict US EPA standards. The data is collected from multiple reliable sources, including satellites and ground-based monitoring stations. This data is further analyzed and enhanced using machine learning and advanced algorithms that factor in elements such as traffic and population density, ensuring accurate and reliable results.
Source: Ambee Data Sources
The air quality for Napa, California is updated every hour.
The worst air quality in Napa, California in the last 24 hours was observed at 09:00:00 on 2025-07-29.
In the last 24 hrs, the best air quality in Napa, California was observed at 02:00:00 on 2025-07-30.
The current air quality in Napa, California is 27, categorized as Good based on real-time data.
The most common pollutant in Napa, California is PM2.5.
If the air quality in Napa, California is poor, consider staying indoors and wearing a mask to protect yourself.
The current PM2.5 concentration at Napa, California is 4.788 μg/m3.
The current PM10 concentration at Napa, California is 21.772 μg/m3.
The current carbon monoxide (CO) concentration at Napa, California is 0.249 ppm.
The current sulfur dioxide (SO2) concentration at Napa, California is 0.61 ppb.
The current ozone (O3) concentration at Napa, California is 18.352 ppm.
The current nitrogen dioxide (NO2) concentration at Napa, California is 3.663 ppb.
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