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Longueuil
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Live

Longueuil Air Quality Index (AQI) | Air Pollution

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

Last Updated: 2025-07-14 07:26:27 PM (Local Time)

location image
Live AQI
41
Air Quality is
Good
pm10 :  16 µg/m³
PM2.5 :  7 µg/m³
Good
050
Moderate
100
Poor
150
Unhealthy
200
Severe
300
Hazardous
301+
aqi good level.webp in Longueuil
mist

28 °C

Mist
Humidity
Humidity48 %

Wind Speed
Wind Speed16 km/h

UV Index
UV Index1
Last Updated: 2025-07-14 07:26:27 PM (Local Time)
AQI LogoMap

Longueuil

Major Air Pollutants

Longueuil

PM2.5's Icon

Particulate Matter(PM2.5)

7µg/m³

PM10's Icon

Particulate Matter(PM10)

16µg/m³

CO's Icon

Carbon Monoxide(CO)

341ppb

SO2's Icon

Sulfur Dioxide(SO2)

2ppb

NO2's Icon

Nitrogen Dioxide(NO2)

6ppb

O3's Icon

Ozone(O3)

23ppb

Trending in Canada

Why You Should Be Monitoring Air Quality During Monsoon — Not Just in Winter?

Why You Should Be Monitoring Air Quality During Monsoon — Not Just in Winter?

Air Pollution and Lung Cancer: How Toxic Air is Mutating Your DNA?

Air Pollution and Lung Cancer: How Toxic Air is Mutating Your DNA?

City Climate Change Severity Analysis is NOW LIVE on AQI.in!📢

City Climate Change Severity Analysis is NOW LIVE on AQI.in!📢

AQI Graph

Historical Air Quality Data

Longueuil

24 Hours
AQI
Longueuil
AQI
.
13-07-2025Time14-07-2025
TimeLongueuil
07 PM41
08 PM41
09 PM42
10 PM41
11 PM40
12 AM41
01 AM43
02 AM41
03 AM38
04 AM36
05 AM34
06 AM34
07 AM33
08 AM34
09 AM35
10 AM36
11 AM41
12 PM48
01 PM48
02 PM48
03 PM43
04 PM41
05 PM40
06 PM41
07 PM40
33
Min.at 7:12 AM on 14th Jul
48
Max.at 12:11 PM on 14th Jul

Want air quality data?

AQI Logo

Download 2024 Annual Data

World Air Quality Report

Globe

AQI Trends - Annual Air Quality Changes

Longueuil, Quebec, Canada

AQI
Year
.
AQI
AQI AQI
Mar 202026
Apr 202023
May 202023
Jun 202024
Jul 202026
Aug 202022
Sep 202023
Oct 202021
Nov 202034
Dec 202029
Jan 202132
Feb 202138
Mar 202132
Apr 202128
May 202129
Jun 202132
Jul 202137
Aug 202141
Sep 202122
Oct 202128
Nov 202128
Dec 202134
Jan 202245
Feb 202238
Mar 202235
Apr 202228
May 202232
Jun 202230
Jul 202234
Aug 202223
Sep 202225
Oct 202233
Nov 202231
Dec 202231
Jan 202334
Feb 202338
Mar 202332
Apr 202332
May 202332
Jun 202354
Jul 202348
Aug 202334
Sep 202341
Oct 202328
Nov 202327
Dec 202335
Jan 202430
Feb 202437
Mar 202427
Apr 202424
May 202427
Jun 202431
Jul 202432
Aug 202437
Sep 202434
Oct 202426
Nov 202424
Dec 202438
Jan 202533
Feb 202532
Mar 202532
Apr 202523
May 202524
Jun 202537
Jul 202538


Annual AQI Trends

2020
25AQI
2021
32AQI
28%
Rise
2022
33AQI
3%
Rise
2023
36AQI
9%
Rise
2024
31AQI
-14%
Fall
2025
31AQI
0%
No Change
Overall Annual Percentage (%) change of AQI in (2020 to 2025)
5%
Rise (Worsened AQI)

Most & Least Polluted Months

Most PollutedJune, 202354AQI

Least PollutedOctober, 202021AQI

* This data analysis is from year 2020 - 2025

Longueuil's Locations

Real-time Air Pollution Level

Location
Status
AQI
PM2.5(µg/m³)
PM10(µg/m³)
Temp.(°C)
Humi.(%)
Chacnier
Good
42
8
16
24
81
Hochelaga Maisonneuve
Good
41
7
16
24
84
Maisonneuve
Good
41
7
16
24
84
Pilon Park
Good
42
7
15
24
83
Rue Despres
Good
42
7
16
24
83
South Shore Of Montreal
Good
37
7
14
24
85

Canada's Metro Cities

Air Quality Index

Calgary City AQI

Calgary

17

temp.12°C

hum.94%
Edmonton City AQI

Edmonton

29

temp.20°C

hum.42%
Halifax City AQI

Halifax

22

temp.19°C

hum.84%
Montreal City AQI

Montreal

42

temp.28°C

hum.48%
Ottawa City AQI

Ottawa

48

temp.29°C

hum.52%
Toronto City AQI

Toronto

51

temp.28°C

hum.55%
Vancouver City AQI

Vancouver

16

temp.20°C

hum.65%
Windsor City AQI

Windsor

71

temp.31°C

hum.28%

Air Quality Calendar 2025

Longueuil

2025
AQI
January
Sun.Mon.Tue.Wed.Thu.Fri.Sat.
29 Dec
-
30 Dec
-
31 Dec
-
1 Jan
32
2 Jan
23
3 Jan
20
4 Jan
20
5 Jan
22
6 Jan
25
7 Jan
21
8 Jan
21
9 Jan
20
10 Jan
21
11 Jan
38
12 Jan
35
13 Jan
58
14 Jan
33
15 Jan
23
16 Jan
30
17 Jan
60
18 Jan
45
19 Jan
26
20 Jan
24
21 Jan
37
22 Jan
48
23 Jan
43
24 Jan
46
25 Jan
52
26 Jan
39
27 Jan
26
28 Jan
25
29 Jan
29
30 Jan
25
31 Jan
43
1 Feb
25
February
Sun.Mon.Tue.Wed.Thu.Fri.Sat.
26 Jan
39
27 Jan
26
28 Jan
25
29 Jan
29
30 Jan
25
31 Jan
43
1 Feb
25
2 Feb
38
3 Feb
55
4 Feb
29
5 Feb
23
6 Feb
35
7 Feb
35
8 Feb
28
9 Feb
37
10 Feb
26
11 Feb
28
12 Feb
30
13 Feb
27
14 Feb
21
15 Feb
23
16 Feb
23
17 Feb
21
18 Feb
22
19 Feb
21
20 Feb
26
21 Feb
20
22 Feb
26
23 Feb
50
24 Feb
48
25 Feb
58
26 Feb
46
27 Feb
45
28 Feb
32
1 Mar
30
March
Sun.Mon.Tue.Wed.Thu.Fri.Sat.
23 Feb
50
24 Feb
48
25 Feb
58
26 Feb
46
27 Feb
45
28 Feb
32
1 Mar
30
2 Mar
24
3 Mar
37
4 Mar
37
5 Mar
57
6 Mar
21
7 Mar
21
8 Mar
24
9 Mar
25
10 Mar
30
11 Mar
46
12 Mar
23
13 Mar
43
14 Mar
79
15 Mar
62
16 Mar
55
17 Mar
33
18 Mar
34
19 Mar
39
20 Mar
27
21 Mar
21
22 Mar
24
23 Mar
20
24 Mar
24
25 Mar
25
26 Mar
22
27 Mar
20
28 Mar
22
29 Mar
21
30 Mar
25
31 Mar
32
1 Apr
18
2 Apr
20
3 Apr
21
4 Apr
19
5 Apr
20
April
Sun.Mon.Tue.Wed.Thu.Fri.Sat.
30 Mar
25
31 Mar
32
1 Apr
18
2 Apr
20
3 Apr
21
4 Apr
19
5 Apr
20
6 Apr
18
7 Apr
20
8 Apr
21
9 Apr
18
10 Apr
26
11 Apr
32
12 Apr
41
13 Apr
26
14 Apr
33
15 Apr
29
16 Apr
15
17 Apr
17
18 Apr
26
19 Apr
44
20 Apr
16
21 Apr
22
22 Apr
22
23 Apr
16
24 Apr
25
25 Apr
24
26 Apr
24
27 Apr
14
28 Apr
23
29 Apr
31
30 Apr
17
1 May
18
2 May
25
3 May
16
May
Sun.Mon.Tue.Wed.Thu.Fri.Sat.
27 Apr
14
28 Apr
23
29 Apr
31
30 Apr
17
1 May
18
2 May
25
3 May
16
4 May
29
5 May
22
6 May
22
7 May
17
8 May
16
9 May
18
10 May
24
11 May
16
12 May
23
13 May
34
14 May
38
15 May
30
16 May
43
17 May
41
18 May
22
19 May
15
20 May
15
21 May
21
22 May
17
23 May
17
24 May
14
25 May
17
26 May
24
27 May
27
28 May
33
29 May
33
30 May
26
31 May
31
June
Sun.Mon.Tue.Wed.Thu.Fri.Sat.
1 Jun
16
2 Jun
18
3 Jun
25
4 Jun
41
5 Jun
42
6 Jun
53
7 Jun
58
8 Jun
57
9 Jun
59
10 Jun
43
11 Jun
51
12 Jun
56
13 Jun
28
14 Jun
28
15 Jun
31
16 Jun
44
17 Jun
43
18 Jun
26
19 Jun
38
20 Jun
22
21 Jun
25
22 Jun
27
23 Jun
40
24 Jun
51
25 Jun
47
26 Jun
30
27 Jun
30
28 Jun
27
29 Jun
30
30 Jun
30
1 Jul
34
2 Jul
30
3 Jul
38
4 Jul
24
5 Jul
27
July
Sun.Mon.Tue.Wed.Thu.Fri.Sat.
29 Jun
30
30 Jun
30
1 Jul
34
2 Jul
30
3 Jul
38
4 Jul
24
5 Jul
27
6 Jul
40
7 Jul
43
8 Jul
31
9 Jul
42
10 Jul
47
11 Jul
49
12 Jul
52
13 Jul
43
14 Jul
-
15 Jul
-
16 Jul
-
17 Jul
-
18 Jul
-
19 Jul
-
20 Jul
-
21 Jul
-
22 Jul
-
23 Jul
-
24 Jul
-
25 Jul
-
26 Jul
-
27 Jul
-
28 Jul
-
29 Jul
-
30 Jul
-
31 Jul
-
1 Aug
-
2 Aug
-
Good
050
Moderate
100
Poor
150
Unhealthy
200
Severe
300
Hazardous
301+

Health Advice For People Living In

Longueuil

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


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

Longueuil

  • asthma due to air pollution in LongueuilAsthma
  • heart due to air pollution in LongueuilHeart Issues
  • allergy due to air pollution in LongueuilAllergies
  • sinus due to air pollution in LongueuilSinus
  • flu due to air pollution in LongueuilCold/Flu
  • copd due to air pollution in LongueuilChronic (COPD)
asthma due to air pollution in Longueuil

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.

Most Polluted Cities 2025

Canada

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.

Kenora, Canada

108
Poor
7xabove Standard

2.

Searchmont, Canada

106
Poor
7xabove Standard

3.

Oakbank, Canada

94
Moderate
6xabove Standard

4.

Rosser, Canada

89
Moderate
6xabove Standard

5.

Winnipeg, Canada

88
Moderate
6xabove Standard

6.

Sault Ste. Marie, Canada

88
Moderate
6xabove Standard

7.

Thunder Bay, Canada

87
Moderate
6xabove Standard

8.

Oliver Paipoonge, Canada

87
Moderate
6xabove Standard

9.

Pickle Lake, Canada

85
Moderate
6xabove Standard

10.

Chapais, Canada

79
Moderate
5xabove Standard

Last Updated: 14 Jul 2025, 10:33 PM

AQI City Rankings

Air Quality Solutions For Longueuil

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 Longueuil

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 Longueuil

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 Longueuil

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 Longueuil

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 Longueuil

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 Longueuil

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 Longueuil

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 Longueuil

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 Longueuil

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 Longueuil

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 Longueuil

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 Longueuil

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 Longueuil

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 Longueuil

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 Longueuil

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 Longueuil

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.

Longueuil'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 Longueuil
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 Longueuil

Frequently Asked Questions About Air Quality

What is the current AQI level in Longueuil?

The current real-time AQI level in Longueuil is 41 (Good). This was last updated 2025-07-14 07:26:27 PM (Local Time).

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

The best AQI level was 33 (Good) at 7:12 AM (Local Time) during the last 24 hours.

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

The worst AQI level was 48 (Good) at 12:11 PM (Local Time) during the last 24 hours.

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

The AQI levels in Longueuil have been fluctuating throughout the last 24 hours. The levels have increased by highest 48 at 12:11 PM (Local Time), lowest 33 at 7:12 AM (Local Time).

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

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.

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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