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Eureka Air Quality Index (AQI) | Air Pollution

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

Last Updated: 2025-10-28 03:41:35 AM (Local Time)

location image
Live AQI
61(AQI-US)
Air Quality is
Moderate
pm10 :  18 µg/m³
PM2.5 :  14 µg/m³
Good
050
Moderate
100
Poor
150
Unhealthy
200
Severe
300
Hazardous
301+
aqi moderate level.webp in Eureka
clear

6 °C

Clear
Humidity
Humidity100 %
Wind Speed
Wind Speed6 km/h
UV Index
UV Index0
Last Updated: 2025-10-28 03:41:35 AM (Local Time)
Map

Eureka

Major Air Pollutants

Eureka

PM2.5's Icon

Particulate Matter(PM2.5)

14µg/m³

PM10's Icon

Particulate Matter(PM10)

18µg/m³

CO's Icon

Carbon Monoxide(CO)

164ppb

SO2's Icon

Sulfur Dioxide(SO2)

2ppb

NO2's Icon

Nitrogen Dioxide(NO2)

7ppb

O3's Icon

Ozone(O3)

24ppb

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AQI Graph

Historical Air Quality Data

Eureka

24 Hours
AQI
Eureka
AQI
.
27-10-2025Time28-10-2025
17
Min.at 9:04 AM on 27th Oct
71
Max.at 10:04 PM on 27th Oct

Want air quality data?

Download 2024 Annual Data

World Air Quality Report

Globe

AQI Trends - Annual Air Quality Changes

Eureka, California, United States

AQI
Year
.
AQI

Annual AQI Trends

2020
78AQI
2021
37AQI
-53%
Fall
2023
44AQI
19%
Rise
2024
34AQI
-23%
Fall
2025
31AQI
-9%
Fall
Overall Annual Percentage (%) change of AQI in (2020 to 2025)
-16%
Fall (Improved AQI)

Most & Least Polluted Months

Most PollutedOctober, 202078AQI
Least PollutedJuly, 202113AQI

* This data analysis is from year 2020 - 2025

Eureka's Locations

Real-time Air Pollution Level

Location
Status
AQI
PM2.5(µg/m³)
PM10(µg/m³)
Temp.(°C)
Humi.(%)
Moderate
62
15
18
7
100
Moderate
60
14
17
7
100

United States's Metro Cities

Air Quality Index

Chicago City AQI

Chicago

21

temp.9°C
hum.77%
Los Angeles City AQI

Los Angeles

69

temp.16°C
hum.87%
Minneapolis City AQI

Minneapolis

33

temp.9°C
hum.66%
Nashville City AQI

Nashville

17

temp.14°C
hum.87%
New Orleans City AQI

New Orleans

44

temp.20°C
hum.87%
New York City City AQI

New York City

24

temp.7°C
hum.67%
San Francisco City AQI

San Francisco

50

temp.11°C
hum.86%
Washington City AQI

Washington

22

temp.7°C
hum.72%

Air Quality Calendar 2025

Eureka

2025
AQI
January
1 Jan
36
2 Jan
33
3 Jan
34
4 Jan
24
5 Jan
31
6 Jan
28
7 Jan
23
8 Jan
33
9 Jan
37
10 Jan
46
11 Jan
28
12 Jan
27
13 Jan
28
14 Jan
44
15 Jan
52
16 Jan
50
17 Jan
43
18 Jan
43
19 Jan
52
20 Jan
41
21 Jan
52
22 Jan
56
23 Jan
51
24 Jan
53
25 Jan
38
26 Jan
38
27 Jan
43
28 Jan
54
29 Jan
64
30 Jan
66
31 Jan
49
February
1 Feb
34
2 Feb
31
3 Feb
31
4 Feb
30
5 Feb
31
6 Feb
41
7 Feb
31
8 Feb
36
9 Feb
33
10 Feb
27
11 Feb
41
12 Feb
49
13 Feb
34
14 Feb
28
15 Feb
34
16 Feb
33
17 Feb
35
18 Feb
39
19 Feb
29
20 Feb
28
21 Feb
36
22 Feb
50
23 Feb
34
24 Feb
31
25 Feb
30
26 Feb
38
27 Feb
44
28 Feb
45
March
1 Mar
40
2 Mar
27
3 Mar
29
4 Mar
29
5 Mar
34
6 Mar
22
7 Mar
30
8 Mar
38
9 Mar
27
10 Mar
35
11 Mar
38
12 Mar
27
13 Mar
25
14 Mar
25
15 Mar
26
16 Mar
30
17 Mar
23
18 Mar
26
19 Mar
30
20 Mar
21
21 Mar
23
22 Mar
23
23 Mar
30
24 Mar
31
25 Mar
36
26 Mar
32
27 Mar
23
28 Mar
27
29 Mar
24
30 Mar
30
31 Mar
24
April
1 Apr
22
2 Apr
22
3 Apr
25
4 Apr
24
5 Apr
27
6 Apr
25
7 Apr
17
8 Apr
20
9 Apr
27
10 Apr
23
11 Apr
27
12 Apr
26
13 Apr
29
14 Apr
31
15 Apr
37
16 Apr
37
17 Apr
32
18 Apr
33
19 Apr
37
20 Apr
39
21 Apr
33
22 Apr
38
23 Apr
43
24 Apr
43
25 Apr
26
26 Apr
31
27 Apr
24
28 Apr
23
29 Apr
27
30 Apr
32
May
1 May
30
2 May
32
3 May
24
4 May
27
5 May
28
6 May
30
7 May
33
8 May
30
9 May
31
10 May
23
11 May
21
12 May
19
13 May
20
14 May
23
15 May
24
16 May
25
17 May
26
18 May
24
19 May
23
20 May
20
21 May
30
22 May
27
23 May
22
24 May
29
25 May
27
26 May
20
27 May
27
28 May
33
29 May
25
30 May
33
31 May
35
June
1 Jun
42
2 Jun
48
3 Jun
47
4 Jun
36
5 Jun
38
6 Jun
35
7 Jun
27
8 Jun
26
9 Jun
27
10 Jun
31
11 Jun
37
12 Jun
42
13 Jun
43
14 Jun
39
15 Jun
36
16 Jun
28
17 Jun
20
18 Jun
22
19 Jun
31
20 Jun
34
21 Jun
20
22 Jun
18
23 Jun
20
24 Jun
23
25 Jun
27
26 Jun
23
27 Jun
26
28 Jun
27
29 Jun
33
30 Jun
34
July
1 Jul
31
2 Jul
30
3 Jul
23
4 Jul
28
5 Jul
39
6 Jul
33
7 Jul
30
8 Jul
26
9 Jul
24
10 Jul
32
11 Jul
48
12 Jul
40
13 Jul
34
14 Jul
35
15 Jul
39
16 Jul
31
17 Jul
29
18 Jul
27
19 Jul
32
20 Jul
28
21 Jul
32
22 Jul
24
23 Jul
23
24 Jul
20
25 Jul
21
26 Jul
19
27 Jul
21
28 Jul
27
29 Jul
28
30 Jul
29
31 Jul
26
August
1 Aug
23
2 Aug
23
3 Aug
30
4 Aug
30
5 Aug
29
6 Aug
26
7 Aug
25
8 Aug
32
9 Aug
37
10 Aug
33
11 Aug
27
12 Aug
27
13 Aug
26
14 Aug
21
15 Aug
26
16 Aug
18
17 Aug
19
18 Aug
21
19 Aug
24
20 Aug
24
21 Aug
31
22 Aug
38
23 Aug
39
24 Aug
28
25 Aug
26
26 Aug
32
27 Aug
28
28 Aug
25
29 Aug
27
30 Aug
28
31 Aug
25
September
1 Sep
22
2 Sep
27
3 Sep
29
4 Sep
35
5 Sep
22
6 Sep
24
7 Sep
31
8 Sep
25
9 Sep
18
10 Sep
22
11 Sep
24
12 Sep
25
13 Sep
26
14 Sep
23
15 Sep
28
16 Sep
37
17 Sep
34
18 Sep
36
19 Sep
45
20 Sep
39
21 Sep
34
22 Sep
34
23 Sep
39
24 Sep
49
25 Sep
40
26 Sep
27
27 Sep
36
28 Sep
60
29 Sep
47
30 Sep
20
October
1 Oct
29
2 Oct
26
3 Oct
20
4 Oct
21
5 Oct
19
6 Oct
16
7 Oct
29
8 Oct
30
9 Oct
25
10 Oct
22
11 Oct
14
12 Oct
31
13 Oct
17
14 Oct
25
15 Oct
42
16 Oct
41
17 Oct
47
18 Oct
45
19 Oct
32
20 Oct
45
21 Oct
61
22 Oct
60
23 Oct
51
24 Oct
35
25 Oct
26
26 Oct
22
27 Oct
27
28 Oct
-
29 Oct
-
30 Oct
-
31 Oct
-
Good
050
Moderate
100
Poor
150
Unhealthy
200
Severe
300
Hazardous
301+

Health Advice For People Living In

Eureka

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 On
  • Car Filter
    Car FilterMust
  • N95 Mask
    N95 MaskMust
  • Stay Indoor
    Stay IndoorMust

Must turn on the air purifier to enjoy fresh air.

Get an Air Purifier

Prevent Health Problems: Understand Your Risks

Eureka

  • asthma due to air pollution in EurekaAsthma
  • heart due to air pollution in EurekaHeart Issues
  • allergy due to air pollution in EurekaAllergies
  • sinus due to air pollution in EurekaSinus
  • flu due to air pollution in EurekaCold/Flu
  • copd due to air pollution in EurekaChronic (COPD)
asthma due to air pollution in Eureka

Mild Chances of Asthma

Asthma

Risk of Asthma symptoms is Mild when AQI is Moderate (50-150)

Moderate symptoms including frequent wheezing, noticeable shortness of breath, chest tightness, and persistent cough.

Do's :

  • Limit outdoor activities when AQI is poor.

  • Clean indoor air with an air purifier to reduce exposure.

  • Soothe the respiratory tract with herbal teas or warm water to help alleviate symptoms.

Don'ts :

  • Exercise outdoors without a mask.

  • Stay in smoky areas with strong fumes.

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.

Riverside, United States

87
Moderate
6xabove Standard

2.

Fontana, United States

86
Moderate
6xabove Standard

3.

Jurupa Valley, United States

86
Moderate
6xabove Standard

4.

Yakima, United States

82
Moderate
5xabove Standard

5.

Oceano, United States

80
Moderate
5xabove Standard

6.

Ontario, United States

78
Moderate
5xabove Standard

7.

Arroyo Grande, United States

78
Moderate
5xabove Standard

8.

Miramonte, United States

77
Moderate
5xabove Standard

9.

Nogales, United States

76
Moderate
5xabove Standard

10.

Bromela, United States

75
Moderate
5xabove Standard

Last Updated: 28 Oct 2025, 10:46 AM

AQI City Rankings

Air Quality Solutions For Eureka

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 Eureka

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 Eureka

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 Eureka

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 Eureka

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 Eureka

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 Eureka

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 Eureka

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 Eureka

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 Eureka

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 Eureka

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 Eureka

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 Eureka

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 Eureka

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 Eureka

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 Eureka

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 Eureka

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.

Eureka'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 Eureka
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 Eureka

Frequently Asked Questions About Air Quality

What is the current AQI level in Eureka?

The current real-time AQI level in Eureka is 61 (Moderate). This was last updated 2025-10-28 03:41:35 AM (Local Time).

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

The best AQI level was 17 (Good) at 9:04 AM, Oct 27, 2025 (Local Time) during the last 24 hours.

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

The worst AQI level was 71 (Moderate) at 10:04 PM, Oct 27, 2025 (Local Time) during the last 24 hours.

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

The AQI levels in Eureka have been fluctuating throughout the last 24 hours. The levels have increased by highest 71 at 10:04 PM, Oct 27, 2025 (Local Time), lowest 17 at 9:04 AM, Oct 27, 2025 (Local Time).

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

Current AQI levels are acceptable; however, some pollutants may be a concern for a small number of sensitive individuals.

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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