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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

Ontario's Cities

Real-time Air Pollution Level

cities
Status
AQI (US)
PM₂.₅(µg/m³)
PM₁₀(µg/m³)
Temp.(°C)
Humi.(%)
Poor
109
39
51
20
69
Good
46
11
18
19
73
Moderate
90
31
53
20
83
Moderate
59
16
18
21
73
Moderate
95
33
54
19
83
Moderate
57
16
18
19
83
Moderate
97
34
53
21
86
Moderate
90
30
49
22
78
Good
40
10
18
16
90
Moderate
99
35
57
19
70
Moderate
95
33
55
20
83
Moderate
80
26
59
17
100
Poor
105
38
60
18
83
Moderate
60
17
19
19
83
Moderate
58
16
55
15
87
Good
46
11
13
16
82
Moderate
90
31
56
18
94
Good
46
11
17
20
59
Poor
101
36
55
18
83
Moderate
58
16
53
15
87
Moderate
97
34
56
20
83
Good
46
11
18
20
59
Moderate
65
19
21
19
83
Moderate
62
18
19
21
73
Moderate
63
18
20
18
96
Poor
108
38
53
19
70
Moderate
68
21
43
16
80
Moderate
58
16
18
19
83
Good
42
10
12
18
84
Moderate
99
35
58
20
83
Good
39
9
20
18
73
Moderate
79
26
54
20
82
Moderate
54
14
18
18
74
Moderate
94
32
53
18
88
Good
50
12
13
16
88
Moderate
58
16
18
21
83
Moderate
65
19
22
19
96
Moderate
60
17
19
19
96
Moderate
58
16
18
22
74
Poor
101
36
52
21
86
Moderate
58
16
18
22
74
Moderate
86
29
57
17
100
Moderate
63
18
18
16
94
Good
42
10
11
20
78
Moderate
90
31
56
18
94
Poor
103
37
55
21
73
Poor
109
39
56
18
83
Moderate
94
33
45
25
66

Canada's Metro Cities

Air Quality Index

Calgary City AQI

Calgary

63

temp.17°C
hum.83%
Edmonton City AQI

Edmonton

60

temp.16°C
hum.89%
Halifax City AQI

Halifax

31

temp.14°C
hum.82%
Montreal City AQI

Montreal

40

temp.18°C
hum.77%
Ottawa City AQI

Ottawa

39

temp.18°C
hum.73%
Toronto City AQI

Toronto

99

temp.20°C
hum.88%
Vancouver City AQI

Vancouver

50

temp.20°C
hum.83%
Winnipeg City AQI

Winnipeg

62

temp.18°C
hum.77%

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.

Fort St John, British Columbia

180

Unhealthy

8xabove Standard

2.

Grande Prairie, Alberta

172

Unhealthy

6xabove Standard

3.

Prince George, British Columbia

135

Poor

3xabove Standard

4.

Newmarket, Ontario

112

Poor

3xabove Standard

5.

Waterloo, Ontario

112

Poor

3xabove Standard

6.

Oshawa, Ontario

102

Poor

2xabove Standard

7.

Toronto, Ontario

99

Moderate

2xabove Standard

8.

Brantford, Ontario

97

Moderate

2xabove Standard

9.

Guelph, Ontario

97

Moderate

2xabove Standard

10.

Peterborough, Ontario

96

Moderate

2xabove Standard

Last Updated: 21 Jul 2026, 07:31 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