Stay updated with real-time air quality in Pleasant Hill, 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)
24
Good
Pleasant Hill, California
Last updated: ... (Local time)

Good
Fine
Moderate
Poor
Very poor
Hazardous
4.30 μg/m³
0
12.1
35.5
55.5
250.5
500.5+
22.95 μg/m³
0
55
155
255
425
605+
25.91 ppb
0
55
71
86
201
201+
0.44 ppb
0
36
76
186
605
1005+
2.06 ppb
0
54
101
361
1250
2050+
0.30 ppm
0
4.5
9.5
12.5
230.5
50.5+
Pollen Level
Low
Pleasant Hill, California
Pleasant Hill, California
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AQI 24
Good
4.25μg/m³
PM2.5
22.50μg/m³
PM10
25.83ppb
O3
0.43ppb
SO2
2.15ppb
NO2
0.30ppm
CO
AQI 24
Good
4.29μg/m³
PM2.5
22.92μg/m³
PM10
25.82ppb
O3
0.44ppb
SO2
2.12ppb
NO2
0.31ppm
CO
AQI 23
Good
4.08μg/m³
PM2.5
19.93μg/m³
PM10
25.09ppb
O3
0.41ppb
SO2
2.62ppb
NO2
0.33ppm
CO
AQI 27
Good
5.46μg/m³
PM2.5
17.68μg/m³
PM10
25.08ppb
O3
0.41ppb
SO2
3.04ppb
NO2
0.38ppm
CO
AQI 24
Good
4.37μg/m³
PM2.5
23.43μg/m³
PM10
26.14ppb
O3
0.44ppb
SO2
2.19ppb
NO2
0.31ppm
CO
AQI 24
Good
4.14μg/m³
PM2.5
21.32μg/m³
PM10
25.65ppb
O3
0.42ppb
SO2
2.40ppb
NO2
0.31ppm
CO
Air quality measurements for California, USA meet strict US EPA standards. These measurements are collected from reliable sources, including satellites and ground-based monitoring systems. Advanced algorithms and machine learning techniques are applied to the data, factoring in variables such as traffic and population density, to ensure precision and reliability.
Source: Ambee Data Sources
Air quality data for Pleasant Hill, California is updated on an hourly basis.
The worst air quality in Pleasant Hill, California was recorded at 03:00:00 on 2026-09-21.
The best air quality in Pleasant Hill, California was recorded at 11:00:00 on 2026-09-20.
The real-time air quality index in Pleasant Hill, California is 24, currently categorized as Good.
The most common pollutant in Pleasant Hill, California is O3.
If the air quality in Pleasant Hill, California is poor, limit outdoor activities and use a mask to safeguard your health.
The measured PM2.5 levels in Pleasant Hill, California at present are 4.298 μg/m3.
The current PM10 levels in Pleasant Hill, California are 22.953 μg/m3.
The current carbon monoxide (CO) level in Pleasant Hill, California is 0.304 ppm.
The current sulfur dioxide (SO2) levels in Pleasant Hill, California are 0.436 ppb.
The current ozone (O3) levels at Pleasant Hill, California is 25.914 ppm.
The current nitrogen dioxide (NO2) levels at Pleasant Hill, California is 2.055 ppb.
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