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)
52
Moderate
Mill Valley, California
Last updated: ... (Local time)

Good
Fine
Moderate
Poor
Very poor
Hazardous
10.09 μg/m³
0
12.1
35.5
55.5
250.5
500.5+
47.66 μg/m³
0
55
155
255
425
605+
13.15 ppb
0
55
71
86
201
201+
0.26 ppb
0
36
76
186
605
1005+
5.21 ppb
0
54
101
361
1250
2050+
0.34 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 54
Moderate
10.60μg/m³
PM2.5
48.06μg/m³
PM10
13.94ppb
O3
0.34ppb
SO2
3.74ppb
NO2
0.31ppm
CO
AQI 58
Moderate
12.94μg/m³
PM2.5
58.97μg/m³
PM10
13.78ppb
O3
0.34ppb
SO2
4.09ppb
NO2
0.34ppm
CO
AQI 49
Good
9.25μg/m³
PM2.5
41.71μg/m³
PM10
14.00ppb
O3
0.34ppb
SO2
3.61ppb
NO2
0.30ppm
CO
AQI 52
Moderate
10.32μg/m³
PM2.5
46.77μg/m³
PM10
13.95ppb
O3
0.34ppb
SO2
3.70ppb
NO2
0.31ppm
CO
AQI 71
Moderate
19.66μg/m³
PM2.5
91.92μg/m³
PM10
14.75ppb
O3
0.25ppb
SO2
3.14ppb
NO2
0.40ppm
CO
AQI 64
Moderate
16.23μg/m³
PM2.5
72.84μg/m³
PM10
12.91ppb
O3
0.47ppb
SO2
7.63ppb
NO2
0.31ppm
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 03:00:00 on 2025-12-07.
In the last 24 hrs, the best air quality in Mill Valley, California was observed at 12:00:00 on 2025-12-08.
The current air quality in Mill Valley, California is 52, categorized as Moderate based on real-time data.
The most common pollutant in Mill Valley, California is PM2.5.
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 10.092 μg/m3.
The current PM10 concentration at Mill Valley, California is 47.664 μg/m3.
The current carbon monoxide (CO) concentration at Mill Valley, California is 0.344 ppm.
The current sulfur dioxide (SO2) concentration at Mill Valley, California is 0.264 ppb.
The current ozone (O3) concentration at Mill Valley, California is 13.149 ppm.
The current nitrogen dioxide (NO2) concentration at Mill Valley, California is 5.21 ppb.
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