Napa, California live air quality index now
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)
24
Good
Napa, California
Last updated: ... (Local time)
Major air pollutants in Napa, California
Good
Fine
Moderate
Poor
Very poor
Hazardous
Particulate Matter2.5 (PM2.5)
1.64 μg/m³
0
12.1
35.5
55.5
250.5
500.5+
Particulate Matter10 (PM10)
12.68 μg/m³
0
55
155
255
425
605+
Ozone (O3)
25.83 ppb
0
55
71
86
201
201+
Sulfur Dioxide (SO2)
0.25 ppb
0
36
76
186
605
1005+
Nitrogen Dioxide (NO2)
2.83 ppb
0
54
101
361
1250
2050+
Carbon Monoxide (CO)
0.40 ppm
0
4.5
9.5
12.5
230.5
50.5+
Pollen Level
Low
Napa, California
Napa, California
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Air quality in nearby cities
American Canyon, California
AQI 28
Good
4.90μg/m³
PM2.5
17.18μg/m³
PM10
30.32ppb
O3
0.62ppb
SO2
3.01ppb
NO2
0.14ppm
CO
Sonoma, California
AQI 27
Good
4.86μg/m³
PM2.5
16.74μg/m³
PM10
27.47ppb
O3
0.61ppb
SO2
3.02ppb
NO2
0.14ppm
CO
Vallejo, California
AQI 28
Good
5.06μg/m³
PM2.5
16.29μg/m³
PM10
30.03ppb
O3
0.62ppb
SO2
3.00ppb
NO2
0.14ppm
CO
Fairfield, California
AQI 30
Good
3.92μg/m³
PM2.5
20.38μg/m³
PM10
31.83ppb
O3
0.61ppb
SO2
3.12ppb
NO2
0.13ppm
CO
Suisun City, California
AQI 30
Good
3.92μg/m³
PM2.5
20.38μg/m³
PM10
31.83ppb
O3
0.61ppb
SO2
3.12ppb
NO2
0.13ppm
CO
Vacaville, California
AQI 30
Good
2.91μg/m³
PM2.5
12.77μg/m³
PM10
31.81ppb
O3
0.61ppb
SO2
3.19ppb
NO2
0.13ppm
CO
How accurate is California, USA air quality data?
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
Frequently asked questions
How often is the air quality data for Napa, California updated?
The air quality for Napa, California is updated every hour.
When was the worst air quality at Napa, California in the last 24 hrs?
The worst air quality in Napa, California in the last 24 hours was observed at 06:00:00 on 2026-06-12.
When was the best air quality at Napa, California in the last 24 hrs?
In the last 24 hrs, the best air quality in Napa, California was observed at 11:00:00 on 2026-06-13.
What is the current air quality in Napa, California?
The current air quality in Napa, California is 25, categorized as Good based on real-time data.
What pollutant is the most common in Napa, California?
The most common pollutant in Napa, California is O3.
What should I do if the air quality in Napa, California is poor?
If the air quality in Napa, California is poor, consider staying indoors and wearing a mask to protect yourself.
What is the current concentration of PM2.5 in Napa, California?
The current PM2.5 concentration at Napa, California is 3.794 μg/m3.
What is the current concentration of PM10 in Napa, California?
The current PM10 concentration at Napa, California is 11.663 μg/m3.
What is the current concentration of carbon monoxide (CO) in Napa, California?
The current carbon monoxide (CO) concentration at Napa, California is 0.133 ppm.
What is the current concentration of sulfur dioxide (SO2) in Napa, California?
The current sulfur dioxide (SO2) concentration at Napa, California is 0.612 ppb.
What is the current concentration of ozone (O3) in Napa, California?
The current ozone (O3) concentration at Napa, California is 26.796 ppm.
What is the current concentration of nitrogen dioxide (NO2) in Napa, California?
The current nitrogen dioxide (NO2) concentration at Napa, California is 3.03 ppb.
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