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California Air Quality Index (AQI) | Air Pollution

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

Last Updated: 2025-10-20 09:53:30 AM (Local Time)

location image
Live AQI
39(AQI-US)
Air Quality is
Good
pm10 :  21 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
clear

16 °C

Clear
Humidity
Humidity86 %
Wind Speed
Wind Speed6 km/h
UV Index
UV Index0
Last Updated: 2025-10-20 09:53:30 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)

21µg/m³

CO's Icon

Carbon Monoxide(CO)

223ppb

SO2's Icon

Sulfur Dioxide(SO2)

1ppb

NO2's Icon

Nitrogen Dioxide(NO2)

10ppb

O3's Icon

Ozone(O3)

41ppb

Trending in United States

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AQI Graph

Historical Air Quality Data

California

24 Hours
AQI
California
AQI
.
18-10-2025Time19-10-2025
39
Min.at 7:04 PM on 19th Oct
58
Max.at 12:04 AM on 19th 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
64
16
24
16
83
Moderate
52
10
12
20
61
Good
50
9
18
15
59
Good
18
1
19
20
80
Moderate
69
19
20
21
36
Moderate
56
12
16
20
53
Good
10
1
11
18
60
Good
15
1
16
13
93
Moderate
61
14
29
18
41
Moderate
56
12
13
18
43
Moderate
55
11
19
18
42
Good
16
1
17
18
65
Moderate
70
19
41
21
55
Good
14
1
15
20
40
Good
22
1
24
20
28
Good
23
1
25
13
93
Moderate
66
17
28
20
53
Moderate
55
11
16
16
83
Good
50
9
10
13
37
Good
50
9
10
13
37
Good
16
1
17
23
17
Good
14
1
16
24
23
Good
14
1
15
13
93
Good
17
2
18
22
55
Good
19
1
20
24
23
Good
13
1
14
24
23
Good
15
2
16
16
96
Good
17
1
18
14
89
Good
30
5
18
16
96
Good
16
1
18
18
89
Good
50
9
10
19
36
Moderate
64
16
19
12
50
Moderate
67
18
20
20
50
Good
12
1
14
20
37
Moderate
52
10
22
17
83
Moderate
70
20
28
16
70
Moderate
55
11
22
23
48
Good
50
9
17
15
59
Moderate
55
11
28
21
55
Good
16
1
17
19
71
Moderate
53
10
18
20
53
Moderate
53
10
21
20
53
Moderate
87
28
49
19
78
Moderate
70
20
22
18
70
Good
36
6
18
19
70
Good
15
0
16
13
93
Good
26
1
28
22
38
Moderate
53
10
16
19
56
Moderate
80
25
29
18
76
Moderate
82
26
37
21
55
Moderate
54
11
17
16
76
Good
22
1
24
24
23
Moderate
56
12
17
17
93
Good
16
1
18
18
60
Moderate
60
14
17
16
83
Good
16
0
17
13
86
Moderate
62
15
20
19
61
Good
24
1
26
13
93
Good
15
2
16
17
90
Good
21
1
23
19
71
Good
14
1
14
18
60
Good
23
3
25
22
51
Moderate
66
17
26
18
31
Moderate
68
18
20
12
71
Good
13
2
14
19
71
Moderate
65
16
26
20
68
Good
17
1
18
21
73
Good
12
1
13
18
60
Good
19
1
20
19
71
Good
10
1
11
16
63
Good
18
2
18
20
53
Good
14
1
15
16
96
Moderate
53
10
17
15
59
Moderate
60
14
22
20
50
Moderate
64
16
17
14
100
Moderate
86
28
34
19
78
Moderate
53
10
22
16
83
Moderate
56
12
24
15
83
Good
15
1
16
20
28
Moderate
71
20
22
16
70
Good
10
1
10
16
63
Good
18
1
19
19
71
Moderate
78
24
33
20
63
Good
16
1
17
27
18
Good
11
2
11
18
42
Good
30
2
32
22
47
Moderate
53
10
12
17
30
Moderate
71
20
23
18
78
Good
20
1
22
15
87
Good
17
1
18
21
73
Good
17
3
14
20
40
Moderate
84
27
30
16
70
Good
18
1
19
21
25
Moderate
69
19
25
16
27
Moderate
58
13
20
8
39
Moderate
55
11
16
20
46
Good
20
1
22
13
93
Moderate
56
12
17
18
34
Moderate
52
10
16
19
56
Good
17
1
18
18
94
Good
12
1
13
14
100
Good
38
8
16
17
30
Good
16
1
18
19
78
Good
18
1
19
19
72
Good
21
1
23
18
70
Good
40
1
43
5
56
Moderate
64
16
24
18
73
Good
17
0
18
12
50
Moderate
61
14
22
9
34
Good
18
1
20
18
65
Moderate
62
15
44
21
55
Moderate
71
20
29
20
68
Good
17
1
18
12
85
Good
12
1
12
20
37
Moderate
62
15
16
18
73
Moderate
60
14
40
22
55
Moderate
68
18
26
19
78
Good
13
1
14
17
30
Good
30
1
32
19
68
Good
21
1
23
21
22
Moderate
60
14
20
19
26
Good
13
1
14
13
93
Good
19
0
20
9
61
Moderate
90
30
30
16
83
Good
13
1
14
13
94
Moderate
54
10
18
18
42
Moderate
55
11
21
19
60
Good
12
1
13
20
37
Moderate
61
14
24
16
83
Good
15
1
16
20
53
Good
14
1
15
13
93
Moderate
56
12
15
17
90
Moderate
52
10
11
18
35
Good
27
2
29
22
50
Moderate
66
17
24
20
68
Good
16
1
17
13
97
Moderate
81
25
26
18
70
Moderate
60
14
16
20
50
Good
18
2
19
15
87
Good
11
2
12
27
18
Moderate
63
16
18
20
50
Good
16
1
17
24
21
Moderate
62
15
24
23
48
Good
18
3
19
22
55
Moderate
56
12
13
18
43
Good
17
1
18
22
57
Good
17
3
16
17
90
Good
16
1
17
17
48
Good
50
9
16
19
56
Good
44
8
9
13
37
Good
17
3
17
20
53
Moderate
92
31
35
18
78
Good
16
1
17
6
70
Good
20
0
22
12
50
Good
17
3
10
18
42
Moderate
64
16
22
18
70
Moderate
75
22
24
17
51
Good
19
1
21
23
29
Moderate
55
11
22
19
60
Good
27
5
14
18
34
Good
14
1
16
20
53
Good
28
2
30
22
47
Good
19
1
21
21
28
Good
50
9
10
20
46
Good
11
1
12
20
49
Good
16
1
17
15
87
Good
11
1
12
20
37
Good
17
3
11
18
42
Good
19
3
20
23
29
Good
39
7
18
18
79
Moderate
66
17
20
16
82
Good
22
1
24
18
70
Good
12
1
13
16
63
Moderate
64
16
22
16
83
Good
11
1
12
13
93
Good
14
1
15
18
65
Moderate
86
28
49
16
77
Moderate
73
21
28
16
77
Good
17
1
18
16
96
Good
17
3
15
22
30
Good
21
1
23
13
93
Good
14
1
15
13
93
Good
15
1
16
13
97
Good
11
2
12
16
96
Good
14
1
15
19
36
Good
17
1
18
14
89
Moderate
92
31
40
15
83
Moderate
75
22
44
21
55
Good
50
9
11
18
43
Moderate
66
17
20
21
36
Good
15
1
16
19
84
Good
16
2
15
17
90
Good
40
8
22
19
36
Good
20
1
22
19
71
Good
18
1
19
10
46
Moderate
82
26
43
18
78
Moderate
64
16
24
15
83
Good
17
1
18
18
65
Moderate
66
17
33
21
36
Good
43
9
20
12
50
Good
14
1
15
6
70
Good
15
2
16
19
71
Moderate
56
12
15
17
90
Moderate
84
27
36
19
78
Good
17
3
17
22
30
Good
16
1
17
18
65
Good
16
1
16
6
70
Good
26
1
28
19
68
Moderate
65
16
25
16
70
Good
26
3
28
22
51
Moderate
65
16
18
19
61
Moderate
77
23
28
16
83
Good
17
3
13
14
100
Good
20
1
22
19
30
Moderate
86
28
41
19
78
Moderate
73
21
22
9
81
Good
11
1
12
24
23
Moderate
75
22
30
16
70
Moderate
83
26
28
20
50
Good
17
1
18
18
60
Moderate
86
28
51
15
83
Moderate
53
11
16
18
68
Moderate
84
26
37
19
78
Good
16
1
17
22
38
Moderate
64
16
24
16
63
Good
18
0
20
10
73
Moderate
52
10
16
21
55
Good
14
1
15
21
21

United States's Metro Cities

Air Quality Index

Chicago City AQI

Chicago

19

temp.11°C
hum.48%
Los Angeles City AQI

Los Angeles

18

temp.19°C
hum.71%
Minneapolis City AQI

Minneapolis

69

temp.9°C
hum.52%
Nashville City AQI

Nashville

11

temp.10°C
hum.71%
New Orleans City AQI

New Orleans

24

temp.23°C
hum.48%
New York City City AQI

New York City

43

temp.18°C
hum.81%
San Francisco City AQI

San Francisco

65

temp.16°C
hum.83%
Washington City AQI

Washington

25

temp.16°C
hum.91%

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.

Sebastopol, United States

92
Moderate
6xabove Standard

2.

Porterville, United States

92
Moderate
6xabove Standard

3.

Napa, United States

90
Moderate
6xabove Standard

4.

Corcoran, United States

87
Moderate
6xabove Standard

5.

San Pablo, United States

86
Moderate
6xabove Standard

6.

Windsor, United States

86
Moderate
6xabove Standard

7.

Visalia, United States

86
Moderate
6xabove Standard

8.

Hanford, United States

86
Moderate
6xabove Standard

9.

Three Rivers, United States

84
Moderate
6xabove Standard

10.

Woodlake, United States

84
Moderate
6xabove Standard

Last Updated: 20 Oct 2025, 04:27 AM

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 39 (Good). This was last updated 2025-10-20 09:53:30 AM (Local Time).

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

The best AQI level was 39 (Good) at 7:04 PM, Oct 19, 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 58 (Moderate) at 12:04 AM, Oct 19, 2025 (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 58 at 12:04 AM, Oct 19, 2025 (Local Time), lowest 39 at 7:04 PM, Oct 19, 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.

Recent AQI Blogs

Read the latest news

Here are some latest blogs that you can go through to find out more air pollution.

Red Fort in Delhi is Not Red Anymore! It is Turning Black: Air Pollution Damaging Red Fort

Red Fort in Delhi is Not Red Anymore! It is Turning Black: Air Pollution Damaging Red Fort

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What’s the Connection Between Air Pollution and Blood Cancer?

What’s the Connection Between Air Pollution and Blood Cancer?

13 Sept 2025Shakshi
Mercury Air Pollution in Delhi: What You’re Inhaling Without Knowing

Mercury Air Pollution in Delhi: What You’re Inhaling Without Knowing

9 Sept 2025Shakshi
India Floods 2025: How Waterlogging Is Creating a Hidden Air Pollution Crisis?

India Floods 2025: How Waterlogging Is Creating a Hidden Air Pollution Crisis?

3 Sept 2025Shakshi
No Clean Air Day in Delhi 2025: Why Even Monsoon Could Not Help?

No Clean Air Day in Delhi 2025: Why Even Monsoon Could Not Help?

28 Aug 2025Shakshi
Over 2 lakh residents reported air pollution hospitalisations in Delhi from 2022 to 2024. 

Over 2 lakh residents reported air pollution hospitalisations in Delhi from 2022 to 2024. 

21 Aug 2025Shakshi
Abu Dhabi in the Top 10 Most Polluted Cities in the World: Middle East Air Quality Crisis 2025

Abu Dhabi in the Top 10 Most Polluted Cities in the World: Middle East Air Quality Crisis 2025

19 Aug 2025Shakshi
Europe heatwave and wildfires 2025: What is happening across Spain, Portugal and neighbouring countries?

Europe heatwave and wildfires 2025: What is happening across Spain, Portugal and neighbouring countries?

13 Aug 2025Shakshi
How Air Pollution Damages Your Long-Term Financial Health?

How Air Pollution Damages Your Long-Term Financial Health?

12 Aug 2025Shakshi
Biggest Wildfire in France’s History?What It Means for Air Quality, Health, and Climate

Biggest Wildfire in France’s History?What It Means for Air Quality, Health, and Climate

7 Aug 2025Shakshi
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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
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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