Santa Ana
Santa Ana, California
Updated: Mar 13, 2026, 8:00 AM
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Data unavailable
Current Weather
22.3°C
Temperature
58%
Humidity
3.4
mph wind
Clear sky
Conditions
Pollutant Breakdown
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PM2.5
µg/m³ · Fine particles
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PM10
µg/m³ · Coarse particles
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Ozone
ppb · Ground-level ozone
28.1
NO₂
ppb · Nitrogen dioxide
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SO₂
ppb · Sulfur dioxide
8.9
CO
ppm · Carbon monoxide
PM2.5 Forecast (next 7 days)
Wed
3/11
148
avg
Thu
3/12
84
avg
Fri
3/13
107
avg
Sat
3/14
121
avg
Sun
3/15
74
avg
Mon
3/16
116
avg
Tue
3/17
162
avg
Data from: CARB - California Air Resources Board, Air Now - US EPA, World Air Quality Index Project
Is the air safe in Santa Ana today?
Real-time air quality data for Santa Ana is currently unavailable. Please check back shortly.
The AQI scale runs from 0 to 500. Values of 0–50 are Good, 51–100 are Moderate, 101–150 are Unhealthy for Sensitive Groups, 151–200 are Unhealthy, 201–300 are Very Unhealthy, and 301–500 are Hazardous.
Air quality in Santa Ana, California is monitored by local environmental agencies and reported through the World Air Quality Index project. Data is updated hourly and includes PM2.5, PM10, ozone, nitrogen dioxide, sulfur dioxide, and carbon monoxide.
AQI Scale Reference
0–50
Good
51–100
Moderate
101–150
Unhealthy for Sensitive Groups
151–200
Unhealthy
201–300
Very Unhealthy
301+
Hazardous