Stay updated with real-time air quality in Hollister, 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
Hollister, California
Last updated: ... (Local time)

Good
Fine
Moderate
Poor
Very poor
Hazardous
8.06 μg/m³
0
12.1
35.5
55.5
250.5
500.5+
12.90 μg/m³
0
55
155
255
425
605+
27.90 ppb
0
55
71
86
201
201+
0.37 ppb
0
36
76
186
605
1005+
2.57 ppb
0
54
101
361
1250
2050+
0.23 ppm
0
4.5
9.5
12.5
230.5
50.5+
Pollen Level
Moderate
Hollister, California
Hollister, California
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AQI 49
Good
8.97μg/m³
PM2.5
40.51μg/m³
PM10
23.18ppb
O3
0.28ppb
SO2
4.92ppb
NO2
0.24ppm
CO
AQI 49
Good
9.01μg/m³
PM2.5
39.73μg/m³
PM10
29.88ppb
O3
0.28ppb
SO2
4.54ppb
NO2
0.21ppm
CO
AQI 49
Good
9.02μg/m³
PM2.5
40.76μg/m³
PM10
30.77ppb
O3
0.28ppb
SO2
4.71ppb
NO2
0.20ppm
CO
AQI 44
Good
7.75μg/m³
PM2.5
30.16μg/m³
PM10
30.47ppb
O3
0.28ppb
SO2
3.88ppb
NO2
0.24ppm
CO
AQI 49
Good
8.84μg/m³
PM2.5
38.66μg/m³
PM10
24.89ppb
O3
0.28ppb
SO2
5.44ppb
NO2
0.25ppm
CO
AQI 49
Good
8.61μg/m³
PM2.5
36.91μg/m³
PM10
26.57ppb
O3
0.28ppb
SO2
2.24ppb
NO2
0.23ppm
CO
The air quality data for California, USA is gathered from reliable sources such as satellites and monitoring stations, adhering to US EPA guidelines. With the help of advanced algorithms and machine learning, factors like traffic and population density are analyzed to deliver accurate and dependable results.
Source: Ambee Data Sources
Air quality updates for Hollister, California are available every hour.
Hollister, California experienced its worst air quality at 07:00:00, 2026-05-01.
The best air quality in Hollister, California was observed at 03:00:00 on 2026-05-02.
The air quality in Hollister, California right now is Good, with an AQI of 44.
In Hollister, California, PM2.5 is the most frequently found pollutant.
When air quality in Hollister, California is compromised, staying indoors and wearing a mask can reduce health risks.
Hollister, California currently has a PM2.5 concentration of 8.056 μg/m3.
Hollister, California currently has a PM10 concentration of 12.896 μg/m3.
The current carbon monoxide (CO) level in Hollister, California is 0.233 ppm.
The current sulfur dioxide (SO2) concentration in Hollister, California is 0.368 ppb.
Hollister, California currently has an ozone (O3) concentration of 27.901 ppm.
The current level of nitrogen dioxide (NO2) in Hollister, California is 2.57 ppb.
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