Stay updated with real-time air quality in Hayward, 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
Hayward, California
Last updated: ... (Local time)
Good
Fine
Moderate
Poor
Very poor
Hazardous
7.67 μg/m³
0
12.1
35.5
55.5
250.5
500.5+
33.52 μg/m³
0
55
155
255
425
605+
32.46 ppb
0
55
71
86
201
201+
0.87 ppb
0
36
76
186
605
1005+
5.78 ppb
0
54
101
361
1250
2050+
0.36 ppm
0
4.5
9.5
12.5
230.5
50.5+
Pollen Level
Moderate
Hayward, California
Hayward, California
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AQI 44
Good
7.69μg/m³
PM2.5
33.63μg/m³
PM10
32.24ppb
O3
0.87ppb
SO2
5.70ppb
NO2
0.36ppm
CO
AQI 44
Good
7.67μg/m³
PM2.5
33.52μg/m³
PM10
32.46ppb
O3
0.87ppb
SO2
5.78ppb
NO2
0.36ppm
CO
AQI 44
Good
7.76μg/m³
PM2.5
33.90μg/m³
PM10
32.06ppb
O3
0.87ppb
SO2
5.71ppb
NO2
0.36ppm
CO
AQI 44
Good
7.84μg/m³
PM2.5
34.23μg/m³
PM10
31.20ppb
O3
0.87ppb
SO2
4.89ppb
NO2
0.33ppm
CO
AQI 44
Good
7.80μg/m³
PM2.5
34.12μg/m³
PM10
31.27ppb
O3
0.88ppb
SO2
4.72ppb
NO2
0.33ppm
CO
AQI 44
Good
8.07μg/m³
PM2.5
35.39μg/m³
PM10
32.87ppb
O3
0.88ppb
SO2
6.04ppb
NO2
0.37ppm
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 Hayward, California is updated every hour.
The worst air quality in Hayward, California in the last 24 hours was observed at 09:00:00 on 2025-06-06.
In the last 24 hrs, the best air quality in Hayward, California was observed at 09:00:00 on 2025-06-06.
The current air quality in Hayward, California is 44, categorized as Good based on real-time data.
The most common pollutant in Hayward, California is PM2.5.
If the air quality in Hayward, California is poor, consider staying indoors and wearing a mask to protect yourself.
The current PM2.5 concentration at Hayward, California is 7.669 μg/m3.
The current PM10 concentration at Hayward, California is 33.52 μg/m3.
The current carbon monoxide (CO) concentration at Hayward, California is 0.365 ppm.
The current sulfur dioxide (SO2) concentration at Hayward, California is 0.87 ppb.
The current ozone (O3) concentration at Hayward, California is 32.458 ppm.
The current nitrogen dioxide (NO2) concentration at Hayward, California is 5.783 ppb.
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