Stay updated with real-time air quality in Placentia, 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)
66
Moderate
Placentia, California
Last updated: ... (Local time)

Good
Fine
Moderate
Poor
Very poor
Hazardous
16.78 μg/m³
0
12.1
35.5
55.5
250.5
500.5+
39.04 μg/m³
0
55
155
255
425
605+
33.18 ppb
0
55
71
86
201
201+
0.70 ppb
0
36
76
186
605
1005+
19.12 ppb
0
54
101
361
1250
2050+
0.45 ppm
0
4.5
9.5
12.5
230.5
50.5+
Pollen Level
Low
Placentia, California
Placentia, California
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AQI 64
Moderate
15.99μg/m³
PM2.5
36.90μg/m³
PM10
32.83ppb
O3
0.72ppb
SO2
18.98ppb
NO2
0.42ppm
CO
AQI 66
Moderate
17.24μg/m³
PM2.5
38.91μg/m³
PM10
32.71ppb
O3
0.71ppb
SO2
18.50ppb
NO2
0.44ppm
CO
AQI 66
Moderate
17.19μg/m³
PM2.5
40.45μg/m³
PM10
35.42ppb
O3
0.72ppb
SO2
21.80ppb
NO2
0.53ppm
CO
AQI 66
Moderate
17.18μg/m³
PM2.5
40.20μg/m³
PM10
31.61ppb
O3
0.68ppb
SO2
18.07ppb
NO2
0.38ppm
CO
AQI 64
Moderate
16.25μg/m³
PM2.5
37.65μg/m³
PM10
34.77ppb
O3
0.72ppb
SO2
19.94ppb
NO2
0.48ppm
CO
AQI 67
Moderate
18.40μg/m³
PM2.5
43.22μg/m³
PM10
30.09ppb
O3
0.65ppb
SO2
17.72ppb
NO2
0.30ppm
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 Placentia, California are available every hour.
Placentia, California experienced its worst air quality at 12:00:00, 2025-12-07.
The best air quality in Placentia, California was observed at 10:00:00 on 2025-12-06.
The air quality in Placentia, California right now is Moderate, with an AQI of 66.
In Placentia, California, PM2.5 is the most frequently found pollutant.
When air quality in Placentia, California is compromised, staying indoors and wearing a mask can reduce health risks.
Placentia, California currently has a PM2.5 concentration of 16.776 μg/m3.
Placentia, California currently has a PM10 concentration of 39.041 μg/m3.
The current carbon monoxide (CO) level in Placentia, California is 0.448 ppm.
The current sulfur dioxide (SO2) concentration in Placentia, California is 0.703 ppb.
Placentia, California currently has an ozone (O3) concentration of 33.176 ppm.
The current level of nitrogen dioxide (NO2) in Placentia, California is 19.118 ppb.
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