Stay updated with real-time air quality in Mill Valley, 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)
19
Good
Mill Valley, California
Last updated: ... (Local time)
Good
Fine
Moderate
Poor
Very poor
Hazardous
1.42 μg/m³
0
12.1
35.5
55.5
250.5
500.5+
5.59 μg/m³
0
55
155
255
425
605+
20.23 ppb
0
55
71
86
201
201+
0.46 ppb
0
36
76
186
605
1005+
0.72 ppb
0
54
101
361
1250
2050+
0.22 ppm
0
4.5
9.5
12.5
230.5
50.5+
Pollen Level
Low
Mill Valley, California
Mill Valley, California
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AQI 19
Good
0.86μg/m³
PM2.5
3.68μg/m³
PM10
20.50ppb
O3
0.41ppb
SO2
2.18ppb
NO2
0.21ppm
CO
AQI 19
Good
1.20μg/m³
PM2.5
5.08μg/m³
PM10
21.37ppb
O3
0.41ppb
SO2
2.15ppb
NO2
0.23ppm
CO
AQI 19
Good
0.71μg/m³
PM2.5
3.06μg/m³
PM10
20.05ppb
O3
0.42ppb
SO2
2.20ppb
NO2
0.20ppm
CO
AQI 19
Good
0.83μg/m³
PM2.5
3.53μg/m³
PM10
20.41ppb
O3
0.41ppb
SO2
2.18ppb
NO2
0.21ppm
CO
AQI 23
Good
1.47μg/m³
PM2.5
6.23μg/m³
PM10
25.42ppb
O3
0.24ppb
SO2
1.57ppb
NO2
0.14ppm
CO
AQI 21
Good
3.06μg/m³
PM2.5
13.36μg/m³
PM10
23.04ppb
O3
0.47ppb
SO2
2.09ppb
NO2
0.21ppm
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 Mill Valley, California is updated every hour.
The worst air quality in Mill Valley, California in the last 24 hours was observed at 07:00:00 on 2025-07-16.
In the last 24 hrs, the best air quality in Mill Valley, California was observed at 04:00:00 on 2025-07-16.
The current air quality in Mill Valley, California is 19, categorized as Good based on real-time data.
The most common pollutant in Mill Valley, California is O3.
If the air quality in Mill Valley, California is poor, consider staying indoors and wearing a mask to protect yourself.
The current PM2.5 concentration at Mill Valley, California is 2.104 μg/m3.
The current PM10 concentration at Mill Valley, California is 9.156 μg/m3.
The current carbon monoxide (CO) concentration at Mill Valley, California is 0.221 ppm.
The current sulfur dioxide (SO2) concentration at Mill Valley, California is 0.592 ppb.
The current ozone (O3) concentration at Mill Valley, California is 21.086 ppm.
The current nitrogen dioxide (NO2) concentration at Mill Valley, California is 1.572 ppb.
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