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)
15
Good
Mill Valley, California
Last updated: ... (Local time)
Good
Fine
Moderate
Poor
Very poor
Hazardous
2.31 μg/m³
0
12.1
35.5
55.5
250.5
500.5+
9.78 μg/m³
0
55
155
255
425
605+
15.51 ppb
0
55
71
86
201
201+
0.42 ppb
0
36
76
186
605
1005+
2.02 ppb
0
54
101
361
1250
2050+
0.23 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 44
Good
8.16μg/m³
PM2.5
35.84μg/m³
PM10
18.06ppb
O3
0.53ppb
SO2
1.83ppb
NO2
0.20ppm
CO
AQI 44
Good
8.37μg/m³
PM2.5
36.94μg/m³
PM10
18.07ppb
O3
0.51ppb
SO2
1.73ppb
NO2
0.21ppm
CO
AQI 44
Good
8.02μg/m³
PM2.5
35.09μg/m³
PM10
18.01ppb
O3
0.54ppb
SO2
1.89ppb
NO2
0.20ppm
CO
AQI 44
Good
8.14μg/m³
PM2.5
35.70μg/m³
PM10
18.05ppb
O3
0.54ppb
SO2
1.84ppb
NO2
0.20ppm
CO
AQI 49
Good
9.41μg/m³
PM2.5
42.05μg/m³
PM10
19.78ppb
O3
0.48ppb
SO2
0.96ppb
NO2
0.21ppm
CO
AQI 38
Good
7.18μg/m³
PM2.5
31.82μg/m³
PM10
17.07ppb
O3
0.43ppb
SO2
1.64ppb
NO2
0.30ppm
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 04:00:00 on 2025-07-29.
In the last 24 hrs, the best air quality in Mill Valley, California was observed at 02:00:00 on 2025-07-29.
The current air quality in Mill Valley, California is 44, categorized as Good 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 7.984 μg/m3.
The current PM10 concentration at Mill Valley, California is 35.313 μg/m3.
The current carbon monoxide (CO) concentration at Mill Valley, California is 0.208 ppm.
The current sulfur dioxide (SO2) concentration at Mill Valley, California is 0.512 ppb.
The current ozone (O3) concentration at Mill Valley, California is 17.532 ppm.
The current nitrogen dioxide (NO2) concentration at Mill Valley, California is 1.757 ppb.
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