Stay updated with real-time air quality in TamalpaisHomestead 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)
44
Good
TamalpaisHomestead Valley, California
Last updated: ... (Local time)

Good
Fine
Moderate
Poor
Very poor
Hazardous
8.25 μg/m³
0
12.1
35.5
55.5
250.5
500.5+
36.90 μg/m³
0
55
155
255
425
605+
33.54 ppb
0
55
71
86
201
201+
0.95 ppb
0
36
76
186
605
1005+
3.45 ppb
0
54
101
361
1250
2050+
0.30 ppm
0
4.5
9.5
12.5
230.5
50.5+
Pollen Level
High
TamalpaisHomestead Valley, California
TamalpaisHomestead Valley, California
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AQI 44
Good
8.25μg/m³
PM2.5
36.90μg/m³
PM10
33.54ppb
O3
0.95ppb
SO2
3.45ppb
NO2
0.30ppm
CO
AQI 44
Good
8.38μg/m³
PM2.5
37.61μg/m³
PM10
33.31ppb
O3
0.95ppb
SO2
3.57ppb
NO2
0.30ppm
CO
AQI 49
Good
8.73μg/m³
PM2.5
39.50μg/m³
PM10
32.62ppb
O3
0.95ppb
SO2
3.88ppb
NO2
0.30ppm
CO
AQI 49
Good
8.97μg/m³
PM2.5
40.86μg/m³
PM10
32.06ppb
O3
0.94ppb
SO2
4.08ppb
NO2
0.30ppm
CO
AQI 49
Good
8.78μg/m³
PM2.5
39.79μg/m³
PM10
32.52ppb
O3
0.95ppb
SO2
3.93ppb
NO2
0.30ppm
CO
AQI 44
Good
7.75μg/m³
PM2.5
33.76μg/m³
PM10
29.89ppb
O3
0.66ppb
SO2
1.46ppb
NO2
0.30ppm
CO
Air quality and pollutant data for California, USA are sourced from ground-based monitors and satellites, adhering to US EPA standards. Machine learning and advanced algorithms enhance the data by incorporating local variables like traffic and population density, ensuring high accuracy and dependability.
Source: Ambee Data Sources
The air quality information for Tamalpaishomestead Valley, California is updated every hour for accuracy.
In the past 24 hours, the air quality in Tamalpaishomestead Valley, California was at its worst at 06:00:00 on 2026-04-25.
In the last 24 hours, the best air quality in Tamalpaishomestead Valley, California was observed at 11:00:00 on 2026-04-25.
As of now, the AQI in Tamalpaishomestead Valley, California is 44, indicating Good conditions.
Tamalpaishomestead Valley, California air has the highest levels of PM2.5.
Poor air quality in Tamalpaishomestead Valley, California means it's advisable to stay indoors and wear a mask for your protection.
PM2.5 levels in Tamalpaishomestead Valley, California are currently 8.254 μg/m3.
The PM10 concentration in Tamalpaishomestead Valley, California is 36.902 μg/m3 at the moment.
The current carbon monoxide (CO) concentration in Tamalpaishomestead Valley, California is 0.3 ppm.
Currently, Tamalpaishomestead Valley, California has a sulfur dioxide (SO2) concentration of 0.949 ppb.
The current ozone (O3) level in Tamalpaishomestead Valley, California at the moment is 33.543 ppm.
Nitrogen dioxide (NO2) level in Tamalpaishomestead Valley, California at the moment is 3.453 ppb.
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