Stay updated with real-time air quality in Hillcrest, 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)
40
Good
Hillcrest, California
Last updated: ... (Local time)
Good
Fine
Moderate
Poor
Very poor
Hazardous
5.03 μg/m³
0
12.1
35.5
55.5
250.5
500.5+
31.21 μg/m³
0
55
155
255
425
605+
43.26 ppb
0
55
71
86
201
201+
0.49 ppb
0
36
76
186
605
1005+
8.17 ppb
0
54
101
361
1250
2050+
0.12 ppm
0
4.5
9.5
12.5
230.5
50.5+
Pollen Level
Low
Hillcrest, California
Hillcrest, California
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AQI 56
Moderate
11.80μg/m³
PM2.5
49.91μg/m³
PM10
25.57ppb
O3
0.42ppb
SO2
13.71ppb
NO2
0.20ppm
CO
AQI 58
Moderate
12.80μg/m³
PM2.5
51.47μg/m³
PM10
26.70ppb
O3
0.44ppb
SO2
14.90ppb
NO2
0.20ppm
CO
AQI 56
Moderate
11.73μg/m³
PM2.5
49.75μg/m³
PM10
26.15ppb
O3
0.41ppb
SO2
13.77ppb
NO2
0.20ppm
CO
AQI 58
Moderate
13.25μg/m³
PM2.5
51.91μg/m³
PM10
26.87ppb
O3
0.44ppb
SO2
15.65ppb
NO2
0.20ppm
CO
AQI 56
Moderate
11.96μg/m³
PM2.5
50.62μg/m³
PM10
27.37ppb
O3
0.44ppb
SO2
13.63ppb
NO2
0.20ppm
CO
AQI 56
Moderate
11.96μg/m³
PM2.5
50.83μg/m³
PM10
25.56ppb
O3
0.42ppb
SO2
13.36ppb
NO2
0.20ppm
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 Hillcrest, California are available every hour.
Hillcrest, California experienced its worst air quality at 03:00:00, 2025-07-20.
The best air quality in Hillcrest, California was observed at 05:00:00 on 2025-07-20.
The air quality in Hillcrest, California right now is Moderate, with an AQI of 56.
In Hillcrest, California, PM2.5 is the most frequently found pollutant.
When air quality in Hillcrest, California is compromised, staying indoors and wearing a mask can reduce health risks.
Hillcrest, California currently has a PM2.5 concentration of 11.728 μg/m3.
Hillcrest, California currently has a PM10 concentration of 49.748 μg/m3.
The current carbon monoxide (CO) level in Hillcrest, California is 0.197 ppm.
The current sulfur dioxide (SO2) concentration in Hillcrest, California is 0.409 ppb.
Hillcrest, California currently has an ozone (O3) concentration of 26.149 ppm.
The current level of nitrogen dioxide (NO2) in Hillcrest, California is 13.771 ppb.
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