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California Air Quality Index (AQI) | Air Pollution

Real-time PM2.5, PM10 air pollution level in United States

Last Updated: 2025-10-29 03:11:25 AM (Local Time)

location image
Live AQI
40(AQI-US)
Air Quality is
Good
pm10 :  23 µg/m³
PM2.5 :  8 µg/m³
Good
050
Moderate
100
Poor
150
Unhealthy
200
Severe
300
Hazardous
301+
aqi good level.webp in California
sunny

23 °C

Sunny
Humidity
Humidity53 %
Wind Speed
Wind Speed5 km/h
UV Index
UV Index3
Last Updated: 2025-10-29 03:11:25 AM (Local Time)
Map

California

Major Air Pollutants

California

PM2.5's Icon

Particulate Matter(PM2.5)

8µg/m³

PM10's Icon

Particulate Matter(PM10)

23µg/m³

CO's Icon

Carbon Monoxide(CO)

196ppb

SO2's Icon

Sulfur Dioxide(SO2)

1ppb

NO2's Icon

Nitrogen Dioxide(NO2)

9ppb

O3's Icon

Ozone(O3)

34ppb

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AQI Graph

Historical Air Quality Data

California

24 Hours
AQI
California
AQI
.
27-10-2025Time28-10-2025
36
Min.at 3:04 PM on 27th Oct
46
Max.at 12:04 AM on 28th Oct

Want air quality data?

Download 2024 Annual Data

World Air Quality Report

Globe

California's Cities

Real-time Air Pollution Level

Location
Status
AQI
PM2.5(µg/m³)
PM10(µg/m³)
Temp.(°C)
Humi.(%)
Moderate
55
11
17
21
39
Good
17
3
13
32
23
Good
18
3
19
19
64
Moderate
53
7
60
32
33
Good
28
5
7
24
26
Good
50
9
14
22
29
Good
50
9
15
22
57
Good
28
4
30
29
28
Good
44
8
34
19
39
Moderate
55
11
25
23
42
Good
44
8
24
19
64
Good
39
7
19
21
39
Good
45
8
44
21
49
Good
28
5
24
34
4
Good
28
5
12
28
10
Good
17
3
5
25
29
Good
44
8
13
22
29
Good
50
9
14
25
28
Good
33
6
7
22
13
Good
22
4
18
22
13
Moderate
51
8
56
32
9
Moderate
58
13
30
33
13
Good
31
4
33
29
28
Moderate
55
11
60
32
17
Good
31
3
33
33
13
Moderate
54
10
13
33
13
Moderate
60
14
26
22
65
Moderate
58
13
16
27
41
Moderate
53
10
11
20
50
Moderate
56
12
44
27
41
Good
44
8
40
30
34
Good
39
7
7
26
13
Good
39
7
12
14
44
Good
28
5
15
19
56
Good
28
4
30
36
8
Moderate
65
16
42
22
69
Good
28
5
8
21
41
Moderate
53
10
23
20
56
Good
19
3
20
19
64
Good
17
3
14
20
54
Good
44
8
38
31
32
Good
39
7
13
22
29
Good
39
7
12
22
29
Moderate
61
14
18
18
65
Good
28
5
10
21
41
Moderate
74
22
44
28
43
Good
33
6
15
16
53
Good
31
5
34
34
10
Good
44
8
13
23
26
Good
46
8
22
20
62
Moderate
58
13
27
27
41
Good
44
8
41
19
59
Moderate
55
11
33
31
23
Good
39
7
24
33
13
Good
32
3
35
32
16
Good
38
8
14
22
57
Good
39
7
11
21
39
Good
33
6
35
14
70
Good
50
9
16
25
28
Good
17
3
5
25
29
Good
31
3
33
34
10
Good
44
8
23
31
32
Good
17
3
15
22
57
Moderate
62
15
78
35
8
Good
28
5
17
26
28
Good
28
5
22
20
58
Good
28
5
20
34
4
Moderate
53
11
23
21
56
Moderate
55
7
64
32
24
Good
22
4
5
22
57
Good
44
8
32
31
32
Good
44
8
11
26
26
Good
39
7
15
32
14
Moderate
56
12
18
27
41
Good
28
5
20
19
64
Good
44
8
15
20
57
Good
39
7
11
21
60
Moderate
63
16
39
19
61
Good
44
8
13
24
26
Good
33
6
10
25
28
Good
28
5
18
27
10
Good
22
4
15
20
43
Good
39
7
8
26
26
Good
44
8
24
32
22
Good
44
8
26
19
61
Good
22
4
15
35
9
Good
22
4
8
19
52
Moderate
62
15
71
33
10
Good
33
6
7
22
13
Good
39
7
25
20
63
Good
47
8
17
22
42
Good
44
7
48
32
24
Moderate
60
14
42
34
4
Good
22
4
9
20
43
Good
39
7
30
26
13
Good
50
9
30
19
19
Good
22
4
16
17
15
Moderate
51
9
21
21
53
Good
11
2
3
25
29
Good
39
7
21
25
54
Good
39
7
13
24
26
Good
44
8
41
28
45
Good
22
4
22
30
28
Good
33
6
7
21
14
Good
44
8
44
32
27
Good
46
8
33
31
28
Good
33
6
9
23
34
Good
28
5
11
17
14
Good
36
6
17
21
55
Good
33
6
12
14
44
Good
24
4
18
17
14
Good
42
8
18
21
39
Good
44
8
42
19
59
Moderate
60
14
30
21
56
Good
33
6
23
15
64
Good
33
6
22
35
9
Good
39
7
16
21
55
Good
37
7
15
22
45
Good
23
4
25
19
66
Good
39
7
7
22
13
Moderate
61
14
24
20
40
Good
39
7
29
27
9
Good
22
4
16
15
33
Good
44
8
30
29
28
Good
33
6
7
12
55
Good
44
8
15
22
42
Good
36
4
39
30
27
Good
47
8
24
19
64
Good
28
5
8
22
43
Good
44
8
22
35
9
Moderate
52
10
16
20
45
Moderate
56
12
12
22
29
Good
28
4
30
29
28
Good
38
3
41
34
10
Good
34
6
7
26
13
Moderate
58
12
67
33
13
Good
30
5
24
19
65
Good
45
4
49
31
26
Good
22
4
12
21
41
Good
44
8
16
20
56
Moderate
56
12
15
22
42
Good
28
5
20
36
5
Good
36
6
16
19
56
Moderate
55
11
17
31
8
Moderate
58
13
28
21
56
Good
50
9
29
32
17
Moderate
58
13
19
24
40
Good
44
8
34
32
17
Good
30
3
32
34
10
Good
26
5
18
21
59
Good
44
8
13
24
26
Good
22
4
17
22
13
Good
39
7
30
33
14
Moderate
53
10
22
21
60
Good
33
6
9
16
39
Good
33
6
12
14
44
Good
11
2
3
19
52
Good
32
6
9
21
41
Good
28
5
9
20
35
Moderate
60
14
53
34
9
Good
28
5
8
22
43
Good
37
7
16
25
13
Moderate
56
12
12
22
29
Moderate
62
14
73
33
10
Good
39
7
28
28
12
Good
44
8
14
21
53
Good
40
7
14
21
48
Good
47
8
12
26
26
Moderate
55
11
18
35
9
Good
11
2
3
19
52
Moderate
60
14
49
34
9
Moderate
65
17
39
29
36
Good
44
8
16
21
60
Good
38
7
10
22
34
Good
50
9
13
26
26
Good
50
9
14
19
51
Good
47
8
34
29
28
Good
33
6
10
26
32
Good
22
4
7
22
29
Good
28
5
8
25
28
Moderate
64
16
48
27
41
Good
42
3
46
32
13
Good
11
2
3
26
32
Good
44
8
39
29
28
Good
37
4
40
29
30
Good
44
8
19
32
13
Good
44
8
13
27
13
Moderate
53
10
11
24
33
Good
37
7
10
24
32
Good
44
8
42
19
59
Good
44
8
26
24
40
Good
30
6
8
24
26
Good
44
8
48
32
22
Good
29
3
31
32
13
Good
22
4
13
24
34
Good
44
8
31
32
22
Good
33
6
15
15
33
Good
50
9
20
20
63
Good
39
7
14
25
28
Good
39
7
19
21
39
Good
39
7
10
25
26
Good
39
7
11
14
44
Good
33
6
14
15
33
Moderate
58
13
29
34
4
Good
40
3
42
34
10
Good
23
2
25
20
63
Moderate
51
9
56
32
13
Good
39
7
13
21
39
Good
33
6
14
14
40
Good
28
5
17
20
39
Good
28
5
7
20
43
Moderate
53
10
55
32
14
Good
28
5
18
22
32
Moderate
55
11
16
25
28
Good
26
4
28
31
26
Good
28
5
22
27
10
Moderate
61
14
28
18
65
Good
28
5
11
13
54
Moderate
60
14
26
33
13
Good
25
4
8
20
43
Good
17
3
13
19
56
Moderate
55
11
22
22
57
Good
28
5
7
25
28
Good
30
5
20
21
40
Good
23
2
25
18
70
Good
39
7
24
20
45
Good
41
8
19
20
43
Good
30
6
6
13
50
Good
50
9
18
21
54
Good
28
5
18
28
10

United States's Metro Cities

Air Quality Index

Chicago City AQI

Chicago

45

temp.14°C
hum.49%
Los Angeles City AQI

Los Angeles

51

temp.31°C
hum.32%
Minneapolis City AQI

Minneapolis

46

temp.13°C
hum.52%
Nashville City AQI

Nashville

22

temp.17°C
hum.70%
New Orleans City AQI

New Orleans

33

temp.24°C
hum.64%
New York City City AQI

New York City

30

temp.12°C
hum.54%
San Francisco City AQI

San Francisco

44

temp.24°C
hum.34%
Washington City AQI

Washington

17

temp.13°C
hum.57%

Health Advice For People Living In

California

0Cigarettes per day

Weekly 0 Cigarettes
Monthly 0 Cigarettes

Breathe easy and get active! The air quality is perfect for enjoying outdoor activities.

Source:

Berkeley Earth

Disclaimer: This cigarette-equivalent estimate is based on the average PM2.5 concentration over the last 24 hours, assuming continuous exposure during that time.

Solutions for Current AQI

  • Air Purifier
    Air PurifierTurn Off
  • Car Filter
    Car FilterAdvisable
  • N95 Mask
    N95 MaskAdvisable
  • Stay Indoor
    Stay IndoorAdvisable

As per the current AQI, turn off the air purifier.

Get an Air Purifier

Prevent Health Problems: Understand Your Risks

California

  • asthma due to air pollution in CaliforniaAsthma
  • heart due to air pollution in CaliforniaHeart Issues
  • allergy due to air pollution in CaliforniaAllergies
  • sinus due to air pollution in CaliforniaSinus
  • flu due to air pollution in CaliforniaCold/Flu
  • copd due to air pollution in CaliforniaChronic (COPD)
asthma due to air pollution in California

Low Chances of Asthma

Asthma

Risk of Asthma symptoms is Low when AQI is Good (0-50)

Mild symptoms such as slight wheezing, occasional cough, and minor shortness of breath

Do's :

  • Keep track of air quality to plan outdoor activities safely.

  • Drink water to keep airways moist and reduce irritation.

  • Include non-allergenic fruits and vegetables that support overall lung health, like apples, pears, and spinach.

Don'ts :

  • Skip medications that is prescribed by your doctor.

  • Engage in outdoor activities in early morning during high pollen hours.

Disclaimer: The above health risks are precautionary suggestions based on current AQI levels. You may not feel the effects immediately, but prolonged exposure to air pollution can contribute to these health conditions over time. AQI.IN is neither a medical expert nor a provider of medical advice. Please consult a doctor if you experience any of the above similar symptoms.

Most Polluted Cities 2025

United States

Analyze the real-time most air polluted cities in the country.

Most Polluted Cities Live Ranking 2025
World's Most PollutedCity Rankings (2024)
World's Most PollutedCountry Rankings(2024)
RankCityAQIAQI Status

Standard Value

Follow

1.

Yoder, United States

112
Poor
7xabove Standard

2.

Shiprock, United States

108
Poor
7xabove Standard

3.

Cortez, United States

108
Poor
7xabove Standard

4.

Waterflow, United States

105
Poor
7xabove Standard

5.

Bloomfield, United States

86
Moderate
6xabove Standard

6.

Fort Bliss, United States

84
Moderate
6xabove Standard

7.

Gallup, United States

83
Moderate
6xabove Standard

8.

Aldine, United States

80
Moderate
5xabove Standard

9.

Nageezi, United States

77
Moderate
5xabove Standard

10.

Durango, United States

76
Moderate
5xabove Standard

Last Updated: 28 Oct 2025, 09:42 PM

AQI City Rankings

Air Quality Solutions For California

Explore the solutions of air quality monitoring & clean air.

Here are some applications that you can go through to find out the solutions.

Air Quality Monitor

Air Quality Monitor

Monitor the air quality
Air Quality Sensors

Air Quality Sensors

Sensors to measure the air quality
Fresh Air Machine

Fresh Air Machine

Clean the air you breathe
Car Cabin Filter

Car Cabin Filter

Purify the air in your car
N95 Mask

N95 Mask

Shield yourself from pollution
air quality solutions for offices for California

Air Quality Solution For Offices

A complete solution for air quality monitoring, data analysis, and fresh air solutions in workplaces prioritizing employee's health and productivity.

air quality solutions for smart-city for California

Air Quality Solutions For Smart City

Prana Air smart city project provides air quality monitors, drones, outdoor air purifiers, and data dashboards solution to improve air quality.

air quality solutions for institutes for California

Air Quality Solutions for Schools | Institutes

Prana Air provides the air quality solutions for schools by air monitoring & fresh air machine that help the students to breather clean air.

air quality solutions for hotels for California

Air Quality Solutions For Hotels

Prana Air air quality solutions are suited for hotel businesses. The occupancy of hotels is the main reasons for bad air quality.

air quality solutions for restaurants for California

Air Quality Solutions for Restaurants

Prana Air has the air quality solutions for restaurant, cafes, and gives you the power to know what your customers and staff breathe.

air quality solutions for rmc-plants for California

Air Quality Solutions for RMC Plants

Prana Air provides air quality monitoring solutions for RMC plants. Improve compliance, protect workers and community, and reduce emissions.

air quality solutions for fitness-center for California

Air Quality Solutions for Fitness Center

Prana Air provides the air quality solutions of pollution monitoring and fresh air for fitness center - gym.

air quality solutions for parking-lot for California

Air Quality Solutions for Parking Lot

A complete solution for air monitoring, data analysis, and fresh air solutions for enclosed car parking areas and car lots.

air quality solutions for retail-stores for California

Air Quality Solutions for Retail Stores

Prana Air provides air quality solutions of pollution monitoring and fresh air for retail stores and shopping outlets.

air quality solutions for airport for California

Prana Air provides air quality solutions of pollution monitoring and fresh air for retail stores and shopping outlets

Prana Air provides the air quality solutions for airport. Gathering of many passengers is the main reasons of bad air quality in airport.

air quality solutions for construction-sites for California

Air Quality Solutions For Construction Sites

Prana Air offers air quality monitoring solutions for construction sites with data cloud storage, web-dashboard, mobile apps, TV display.

air quality solutions for hospitals for California

Air Quality Solutions For Hospitals

Prana Air provides air quality monitoring and fresh air solutions for hospitals to ensure clean and healthy indoor air.

air quality solutions for bathroom for California

Air Quality Solutions For Washroom | Bathroom

Improve washroom and bathroom air quality with Prana Air air quality monitoring devices and fresh air machine. Breathe easy and stay healthy.

air quality solutions for banks for California

Air Quality Solutions for Banks

Prana Air provides air quality solutions of pollution monitoring and fresh air for banks and financial institutions.

air quality solutions for cinema for California

Air Quality Solutions for Cinema

Air quality solutions for cinema halls or theatres will help the customers to get the good experience, comfort and breathe clean air.

air quality solutions for real-estates for California

Air Quality Solutions For Real Estates

Prana Air provides the air quality solutions of pollution monitoring and fresh air for real estates - residential and commercial.

California's AQI Data Analytics Solutions

Air quality data monitoring platforms

Mobile AppMobile App
Smart TV AppSmart TV App
Web DashboardWeb Dashboard
APIAPI
WidgetsWidgets
aqi air quality app for California
Mobile App

Empower Your Decisions with Reliable Data

Get it onApp Store
Get it onGoogle Play
Your area’s real-time data with detailed parameters.

Your area’s real-time data with detailed parameters.

Personalized health advice as per current AQI.

Personalized health advice as per current AQI.

Analytical data to identify trends and conditions.

Analytical data to identify trends and conditions.

Connect and control your air quality devices.

Connect and control your air quality devices.

Air Quality FAQs

at California

Frequently Asked Questions About Air Quality

What is the current AQI level in California?

The current real-time AQI level in California is 40 (Good). This was last updated 2025-10-29 03:11:25 AM (Local Time).

When was the best AQI level in California in the last 24 hours?

The best AQI level was 36 (Good) at 3:04 PM, Oct 27, 2025 (Local Time) during the last 24 hours.

When was the worst AQI level in California in the last 24 hours?

The worst AQI level was 46 (Good) at 12:04 AM (Local Time) during the last 24 hours.

What is the current trend of AQI levels in California during last 24 hours?

The AQI levels in California have been fluctuating throughout the last 24 hours. The levels have increased by highest 46 at 12:04 AM (Local Time), lowest 36 at 3:04 PM, Oct 27, 2025 (Local Time).

What actions are recommended as per the current AQI level in California?

The air quality is satisfactory, and air pollution poses little or no risk. No special precautions are needed; enjoy outdoor activities freely.

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Prana Sense

Air Quality Monitor

Air Quality Index depicts the extent of air pollution at a particular location.

Prana Sense Air Quality MonitorPrana Sense Air Quality Monitor
Prana Air Logo

Pocket PM

Air Quality Monitor

Know the air quality around you wherever you are with the Pocket monitor to get instant air quality insights.

Pocket PM Air Quality MonitorPocket PM Air Quality Monitor
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Cair +

Indoor Air Quality Monitor

Track indoor air quality with advanced connectivity and portability for real-time air quality data.

Cair + Indoor Air Quality MonitorCair + Indoor Air Quality Monitor