Live air quality index in Modesto, California today
Stay updated with real-time air quality in Modesto, 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)
42
Good
Modesto, California
Last updated: ... (Local time)
Major air pollutants in Modesto, California
Good
Fine
Moderate
Poor
Very poor
Hazardous
Particulate Matter2.5 (PM2.5)
5.40 μg/m³
0
12.1
35.5
55.5
250.5
500.5+
Particulate Matter10 (PM10)
29.00 μg/m³
0
55
155
255
425
605+
Ozone (O3)
45.00 ppb
0
55
71
86
201
201+
Sulfur Dioxide (SO2)
1.20 ppb
0
36
76
186
605
1005+
Nitrogen Dioxide (NO2)
3.78 ppb
0
54
101
361
1250
2050+
Carbon Monoxide (CO)
0.10 ppm
0
4.5
9.5
12.5
230.5
50.5+
Pollen Level
Low
Modesto, California
Modesto, California
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Modesto, California air quality map: Real-time AQI near you
Air quality in nearby cities
Ceres, California
AQI 42
Good
5.79μg/m³
PM2.5
29.80μg/m³
PM10
45.27ppb
O3
1.20ppb
SO2
3.75ppb
NO2
0.11ppm
CO
Salida, California
AQI 42
Good
6.35μg/m³
PM2.5
30.21μg/m³
PM10
44.73ppb
O3
1.18ppb
SO2
3.73ppb
NO2
0.16ppm
CO
Riverbank, California
AQI 42
Good
6.00μg/m³
PM2.5
29.68μg/m³
PM10
45.01ppb
O3
1.20ppb
SO2
3.75ppb
NO2
0.13ppm
CO
Ripon, California
AQI 42
Good
7.07μg/m³
PM2.5
32.17μg/m³
PM10
44.57ppb
O3
1.16ppb
SO2
3.70ppb
NO2
0.20ppm
CO
Oakdale, California
AQI 49
Good
9.12μg/m³
PM2.5
27.70μg/m³
PM10
46.12ppb
O3
1.21ppb
SO2
3.23ppb
NO2
0.20ppm
CO
Turlock, California
AQI 44
Good
7.79μg/m³
PM2.5
35.97μg/m³
PM10
48.00ppb
O3
1.23ppb
SO2
3.60ppb
NO2
0.16ppm
CO
How accurate is California, USA air quality data?
Air quality measurements for California, USA meet strict US EPA standards. These measurements are collected from reliable sources, including satellites and ground-based monitoring systems. Advanced algorithms and machine learning techniques are applied to the data, factoring in variables such as traffic and population density, to ensure precision and reliability.
Source: Ambee Data Sources
Frequently asked questions
How frequently is the air quality data for Modesto, California updated?
Air quality data for Modesto, California is updated on an hourly basis.
When did Modesto, California experience the worst air quality in the last 24 hours?
The worst air quality in Modesto, California was recorded at 03:00:00 on 2025-06-07.
When did Modesto, California have its best air quality in the last 24 hours?
The best air quality in Modesto, California was recorded at 04:00:00 on 2025-06-07.
What is the real-time air quality index for Modesto, California?
The real-time air quality index in Modesto, California is 42, currently categorized as Good.
Which pollutant is found most often in Modesto, California?
The most common pollutant in Modesto, California is O3.
What can I do if the air quality in Modesto, California is poor?
If the air quality in Modesto, California is poor, limit outdoor activities and use a mask to safeguard your health.
What are the current PM2.5 levels in Modesto, California?
The measured PM2.5 levels in Modesto, California at present are 5.403 μg/m3.
What are the current PM10 levels at Modesto, California?
The current PM10 levels in Modesto, California are 29.004 μg/m3.
What are the current carbon monoxide (CO) levels at Modesto, California?
The current carbon monoxide (CO) level in Modesto, California is 0.1 ppm.
What are the current sulfur dioxide (SO2) levels at Modesto, California?
The current sulfur dioxide (SO2) levels in Modesto, California are 1.201 ppb.
What are the current ozone (O3) levels at Modesto, California?
The current ozone (O3) levels at Modesto, California is 45.001 ppm.
What are the current nitrogen dioxide (NO2) levels at Modesto, California?
The current nitrogen dioxide (NO2) levels at Modesto, California is 3.776 ppb.
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