AQI PM2.5 PM10 CO SO2 NO2 O3

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Longueuil Air Quality Index (AQI) | Air Pollution

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

Last Updated: 2025-06-02 10:41:07 PM (Local Time)

Live AQI

Air Quality is

Good

pm10 : 10 µg/m³

PM2.5 : 3 µg/m³

Good

050

Moderate

100

Poor

150

Unhealthy

200

Severe

300

Hazardous

301+

16 °C

Last Updated: 2025-06-02 10:41:07 PM (Local Time)

Map

Longueuil

Major Air Pollutants
Longueuil

Particulate Matter(PM2.5)

3µg/m³

Particulate Matter(PM10)

10µg/m³

Carbon Monoxide(CO)

406ppb

Sulfur Dioxide(SO2)

3ppb

Nitrogen Dioxide(NO2)

5ppb

Ozone(O3)

26ppb

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AQI Graph

Historical Air Quality Data
Longueuil

24 Hours

AQI

Longueuil

Want air quality data?

AQI Trends - Annual Air Quality Changes
Longueuil, Quebec, Canada

AQI

Year

AQI

Annual AQI Trends

2020

25AQI

2021

32AQI

28%

Rise

2022

33AQI

Rise

2023

36AQI

Rise

2024

31AQI

-14%

Fall

2025

29AQI

-6%

Fall

Overall Annual Percentage (%) change of AQI in (2020 to 2025)

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

Hochelaga Maisonneuve

Good

Maisonneuve

Good

Pilon Park

Good

Rue Despres

Good

South Shore Of Montreal

Good

Canada's Metro Cities
Air Quality Index

Calgary

Edmonton

Halifax

Montreal

Ottawa

Toronto

West Vancouver

Windsor

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 -	2 Jun -	3 Jun -	4 Jun -	5 Jun -	6 Jun -	7 Jun -
8 Jun -	9 Jun -	10 Jun -	11 Jun -	12 Jun -	13 Jun -	14 Jun -
15 Jun -	16 Jun -	17 Jun -	18 Jun -	19 Jun -	20 Jun -	21 Jun -
22 Jun -	23 Jun -	24 Jun -	25 Jun -	26 Jun -	27 Jun -	28 Jun -
29 Jun -	30 Jun -	1 Jul -	2 Jul -	3 Jul -	4 Jul -	5 Jul -

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 PurifierTurn Off
Car FilterAdvisable
N95 MaskAdvisable
Stay IndoorAdvisable

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

Prevent Health Problems: Understand Your Risks

Longueuil

Asthma
Heart Issues
Allergies
Sinus
Cold/Flu
Chronic (COPD)

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

Kenora, Canada

Flin Flon, Canada

Flin Flon, Canada

Thompson, Canada

Searchmont, Canada

Pickle Lake, Canada

Pinehouse, Canada

Buffalo Narrows, Canada

Moderate

4xabove Standard

Prince Albert, Canada

Moderate

4xabove Standard

10.

Yorkton, Canada

Moderate

4xabove Standard

Last Updated: 03 Jun 2025, 01:58 AM

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

Monitor the air quality

Air Quality Sensors

Sensors to measure the air quality

Fresh Air Machine

Clean the air you breathe

Car Cabin Filter

Purify the air in your car

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

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

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

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

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

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

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

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

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

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

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

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

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 App

Smart TV App

Web Dashboard

API

Widgets

Mobile App

Empower Your Decisions with Reliable Data

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

Personalized health advice as per current AQI.

Analytical data to identify trends and conditions.

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 18 (Good). This was last updated 2025-06-02 10:41:07 PM (Local Time).

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

The best AQI level was 15 (Good) at 7:11 AM, Jun 2, 2025 (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 20 (Good) at 2:11 AM, Jun 2, 2025 (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 20 at 2:11 AM, Jun 2, 2025 (Local Time), lowest 15 at 7:11 AM, Jun 2, 2025 (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.