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Ontario Air Quality Index (AQI) | Air Pollution

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

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Check the air quality level of thecities in Ontario

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Ontario

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Ontario's Cities

Real-time Air Pollution Level

cities
Status
AQI (US)
PM₂.₅(µg/m³)
PM₁₀(µg/m³)
Temp.(°C)
Humi.(%)
Good
25
6
18
14
63
Good
42
10
18
17
56
Good
50
12
15
15
51
Good
31
8
18
15
60
Good
36
9
16
16
49
Good
42
10
16
17
54
Good
38
9
18
16
69
Moderate
55
14
16
15
77
Good
21
5
18
14
71
Good
25
6
21
14
63
Moderate
52
13
21
15
51
Good
50
12
18
15
78
Moderate
54
14
17
16
46
Good
42
10
18
18
54
Good
42
10
19
14
71
Good
38
9
20
11
93
Moderate
54
14
18
14
65
Good
25
6
19
16
68
Good
29
7
18
16
48
Good
21
5
19
14
71
Good
36
9
18
15
52
Good
29
7
20
16
68
Good
42
10
17
16
47
Good
29
7
18
17
47
Good
50
12
19
13
85
Good
31
8
18
14
59
Good
42
10
17
15
84
Good
27
6
17
17
47
Moderate
56
15
17
14
95
Good
44
10
19
16
47
Good
25
6
20
15
62
Good
42
10
20
15
74
Good
29
7
17
10
74
Good
32
8
18
14
57
Good
42
10
20
19
57
Moderate
54
14
15
14
78
Moderate
63
18
18
15
72
Moderate
56
15
17
15
72
Good
42
10
22
19
62
Moderate
54
14
18
16
69
Good
50
12
16
19
62
Good
50
12
19
15
78
Good
42
10
18
14
92
Moderate
56
15
17
14
92
Moderate
54
14
18
14
65
Good
41
10
18
18
42
Good
40
10
10
16
48
Moderate
58
13
15
16
48
Moderate
66
19
28
16
54

Canada's Metro Cities

Air Quality Index

Calgary City AQI

Calgary

18

temp.5°C
hum.76%
Edmonton City AQI

Edmonton

17

temp.6°C
hum.55%
Halifax City AQI

Halifax

38

temp.13°C
hum.87%
Montreal City AQI

Montreal

25

temp.17°C
hum.58%
Ottawa City AQI

Ottawa

25

temp.15°C
hum.62%
Toronto City AQI

Toronto

42

temp.20°C
hum.36%
Vancouver City AQI

Vancouver

8

temp.13°C
hum.68%
Winnipeg City AQI

Winnipeg

29

temp.15°C
hum.92%

Most Polluted Cities 2026

Canada

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

Most Polluted Cities Live Ranking 2026
World's Most PollutedCity Rankings (2025)
World's Most PollutedCountry Rankings(2025)
RankCityAQI Status

Standard Value

Follow

1.

Windsor, Ontario

63

Moderate

1xabove Standard

2.

Thunder Bay, Ontario

56

Moderate

1xequal Standard

3.

Sault Ste. Marie, Ontario

52

Moderate

1xbelow Standard

4.

Chatham, Ontario

52

Moderate

1xbelow Standard

5.

Bathurst, New Brunswick

50

Good

1xbelow Standard

6.

Halifax, Nova Scotia

50

Good

1xbelow Standard

7.

Moncton, New Brunswick

50

Good

1xbelow Standard

8.

Guelph, Ontario

50

Good

1xbelow Standard

9.

Mount Pearl Park, Newfoundland And Labrador

46

Good

1xbelow Standard

10.

London, Ontario

46

Good

1xbelow Standard

Last Updated: 27 Sept 2026, 01:34 AM

AQI City Rankings

Air Quality Solutions For Ontario

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
Prana Air offers the solutions of air quality monitoring and clean air machine for Ontario

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.

Prana Air offers the solutions of air quality monitoring and clean air machine for Ontario

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.

Prana Air offers the solutions of air quality monitoring and clean air machine for Ontario

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.

Prana Air offers the solutions of air quality monitoring and clean air machine for Ontario

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.

Prana Air offers the solutions of air quality monitoring and clean air machine for Ontario

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.

Prana Air offers the solutions of air quality monitoring and clean air machine for Ontario

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.

Prana Air offers the solutions of air quality monitoring and clean air machine for Ontario

Air Quality Solutions for Fitness Center

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

Prana Air offers the solutions of air quality monitoring and clean air machine for Ontario

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.

Prana Air offers the solutions of air quality monitoring and clean air machine for Ontario

Air Quality Solutions for Retail Stores

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

Prana Air offers the solutions of air quality monitoring and clean air machine for Ontario

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.

Prana Air offers the solutions of air quality monitoring and clean air machine for Ontario

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.

Prana Air offers the solutions of air quality monitoring and clean air machine for Ontario

Air Quality Solutions For Hospitals

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

Prana Air offers the solutions of air quality monitoring and clean air machine for Ontario

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.

Prana Air offers the solutions of air quality monitoring and clean air machine for Ontario

Air Quality Solutions for Banks

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

Prana Air offers the solutions of air quality monitoring and clean air machine for Ontario

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.

Prana Air offers the solutions of air quality monitoring and clean air machine for Ontario

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.

Ontario's AQI Data Analytics Solutions

Air quality data monitoring platforms

Mobile AppMobile App
Smart TV AppSmart TV App
Web DashboardWeb Dashboard
APIAPI
WidgetsWidgets

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 Air Ambient Air Quality Monitor - most realiable outdoor aqi monitoringPrana Air Ambient Air Quality Monitor - most realiable outdoor aqi monitoring
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.

Prana Air Pocket PM2.5 Air Quality Monitor - portable, smallest and afforablePrana Air Pocket PM2.5 Air Quality Monitor - portable, smallest and afforable
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Cair +

Indoor Air Quality Monitor

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

Prana Air Cair+ Indoor Air Quality Monitor for home, office or institutesPrana Air Cair+ Indoor Air Quality Monitor for home, office or institutes