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)
45
Good
Hillcrest, California
Last updated: ... (Local time)

Good
Fine
Moderate
Poor
Very poor
Hazardous
6.42 μg/m³
0
12.1
35.5
55.5
250.5
500.5+
25.32 μg/m³
0
55
155
255
425
605+
48.93 ppb
0
55
71
86
201
201+
0.79 ppb
0
36
76
186
605
1005+
8.05 ppb
0
54
101
361
1250
2050+
0.10 ppm
0
4.5
9.5
12.5
230.5
50.5+
Pollen Level
Low
Hillcrest, California
Hillcrest, California
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AQI 44
Good
6.55μg/m³
PM2.5
25.69μg/m³
PM10
47.90ppb
O3
0.78ppb
SO2
7.16ppb
NO2
0.10ppm
CO
AQI 45
Good
6.96μg/m³
PM2.5
27.81μg/m³
PM10
48.62ppb
O3
0.79ppb
SO2
10.76ppb
NO2
0.10ppm
CO
AQI 45
Good
6.42μg/m³
PM2.5
25.32μg/m³
PM10
48.93ppb
O3
0.79ppb
SO2
8.05ppb
NO2
0.10ppm
CO
AQI 45
Good
7.30μg/m³
PM2.5
28.88μg/m³
PM10
48.87ppb
O3
0.79ppb
SO2
12.67ppb
NO2
0.10ppm
CO
AQI 45
Good
5.99μg/m³
PM2.5
24.96μg/m³
PM10
49.41ppb
O3
0.79ppb
SO2
8.63ppb
NO2
0.10ppm
CO
AQI 44
Good
7.00μg/m³
PM2.5
27.95μg/m³
PM10
47.85ppb
O3
0.79ppb
SO2
6.09ppb
NO2
0.10ppm
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 01:00:00, 2026-06-08.
The best air quality in Hillcrest, California was observed at 11:00:00 on 2026-06-08.
The air quality in Hillcrest, California right now is Good, with an AQI of 45.
In Hillcrest, California, O3 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 6.42 μg/m3.
Hillcrest, California currently has a PM10 concentration of 25.319 μg/m3.
The current carbon monoxide (CO) level in Hillcrest, California is 0.1 ppm.
The current sulfur dioxide (SO2) concentration in Hillcrest, California is 0.785 ppb.
Hillcrest, California currently has an ozone (O3) concentration of 48.932 ppm.
The current level of nitrogen dioxide (NO2) in Hillcrest, California is 8.052 ppb.
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