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)
52
Moderate
Placentia, California
Last updated: ... (Local time)

Good
Fine
Moderate
Poor
Very poor
Hazardous
10.42 μg/m³
0
12.1
35.5
55.5
250.5
500.5+
35.26 μg/m³
0
55
155
255
425
605+
2.63 ppb
0
55
71
86
201
201+
0.62 ppb
0
36
76
186
605
1005+
11.84 ppb
0
54
101
361
1250
2050+
0.62 ppm
0
4.5
9.5
12.5
230.5
50.5+
Pollen Level
Low
Placentia, California
Placentia, California
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AQI 54
Moderate
10.58μg/m³
PM2.5
34.81μg/m³
PM10
3.05ppb
O3
0.65ppb
SO2
11.90ppb
NO2
0.60ppm
CO
AQI 49
Good
9.09μg/m³
PM2.5
30.97μg/m³
PM10
2.24ppb
O3
0.62ppb
SO2
12.14ppb
NO2
0.62ppm
CO
AQI 60
Moderate
14.09μg/m³
PM2.5
45.75μg/m³
PM10
2.82ppb
O3
0.62ppb
SO2
13.53ppb
NO2
0.67ppm
CO
AQI 44
Good
8.44μg/m³
PM2.5
29.87μg/m³
PM10
2.72ppb
O3
0.61ppb
SO2
10.44ppb
NO2
0.57ppm
CO
AQI 56
Moderate
11.84μg/m³
PM2.5
38.82μg/m³
PM10
2.57ppb
O3
0.63ppb
SO2
12.65ppb
NO2
0.64ppm
CO
AQI 38
Good
7.17μg/m³
PM2.5
26.74μg/m³
PM10
2.98ppb
O3
0.62ppb
SO2
9.06ppb
NO2
0.53ppm
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, 2026-09-07.
The best air quality in Placentia, California was observed at 11:00:00 on 2026-09-06.
The air quality in Placentia, California right now is Moderate, with an AQI of 52.
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 10.424 μg/m3.
Placentia, California currently has a PM10 concentration of 35.262 μg/m3.
The current carbon monoxide (CO) level in Placentia, California is 0.616 ppm.
The current sulfur dioxide (SO2) concentration in Placentia, California is 0.616 ppb.
Placentia, California currently has an ozone (O3) concentration of 2.629 ppm.
The current level of nitrogen dioxide (NO2) in Placentia, California is 11.84 ppb.
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