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)
44
Good
Hillcrest, California
Last updated: ... (Local time)

Good
Fine
Moderate
Poor
Very poor
Hazardous
8.23 μg/m³
0
12.1
35.5
55.5
250.5
500.5+
31.04 μg/m³
0
55
155
255
425
605+
29.41 ppb
0
55
71
86
201
201+
0.77 ppb
0
36
76
186
605
1005+
7.58 ppb
0
54
101
361
1250
2050+
0.21 ppm
0
4.5
9.5
12.5
230.5
50.5+
Pollen Level
Low
Hillcrest, California
Hillcrest, California
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AQI 38
Good
7.06μg/m³
PM2.5
32.13μg/m³
PM10
23.66ppb
O3
0.76ppb
SO2
8.66ppb
NO2
0.21ppm
CO
AQI 38
Good
7.11μg/m³
PM2.5
33.16μg/m³
PM10
22.97ppb
O3
0.77ppb
SO2
10.84ppb
NO2
0.21ppm
CO
AQI 38
Good
6.72μg/m³
PM2.5
29.96μg/m³
PM10
24.66ppb
O3
0.77ppb
SO2
9.17ppb
NO2
0.21ppm
CO
AQI 38
Good
7.02μg/m³
PM2.5
32.88μg/m³
PM10
22.17ppb
O3
0.77ppb
SO2
11.85ppb
NO2
0.21ppm
CO
AQI 38
Good
6.77μg/m³
PM2.5
31.02μg/m³
PM10
26.25ppb
O3
0.77ppb
SO2
9.78ppb
NO2
0.21ppm
CO
AQI 44
Good
7.83μg/m³
PM2.5
35.69μg/m³
PM10
22.18ppb
O3
0.76ppb
SO2
8.54ppb
NO2
0.21ppm
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 12:00:00, 2026-09-07.
The best air quality in Hillcrest, California was observed at 04:00:00 on 2026-09-07.
The air quality in Hillcrest, California right now is Good, with an AQI of 44.
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 8.226 μg/m3.
Hillcrest, California currently has a PM10 concentration of 31.038 μg/m3.
The current carbon monoxide (CO) level in Hillcrest, California is 0.21 ppm.
The current sulfur dioxide (SO2) concentration in Hillcrest, California is 0.774 ppb.
Hillcrest, California currently has an ozone (O3) concentration of 29.412 ppm.
The current level of nitrogen dioxide (NO2) in Hillcrest, California is 7.582 ppb.
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