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Ontario
AQIPM2.5PM10COSO2NO2O3
View aqi DataAQIView weather DataWeather
Live

Ontario Air Quality Index (AQI) | Air Pollution

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

Last Updated: 9 minutes ago (Local Time)

location image
Live AQI
55
Air Quality is
Moderate
pm10 :  24 µg/m³
PM2.5 :  13 µg/m³
Good
050
Moderate
100
Poor
150
Unhealthy
200
Severe
300
Hazardous
301+
aqi moderate level.webp in Ontario
partly cloudy

26 °C

Partly Cloudy
Humidity
Humidity60 %

Wind Speed
Wind Speed9 km/h

UV Index
UV Index0
Last Updated: 9 minutes ago (Local Time)
AQI LogoMap

Ontario

Major Air Pollutants

Ontario

PM2.5's Icon

Particulate Matter(PM2.5)

13µg/m³

PM10's Icon

Particulate Matter(PM10)

24µg/m³

CO's Icon

Carbon Monoxide(CO)

111ppb

SO2's Icon

Sulfur Dioxide(SO2)

1ppb

NO2's Icon

Nitrogen Dioxide(NO2)

5ppb

O3's Icon

Ozone(O3)

28ppb

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

Ontario

24 Hours
AQI
Ontario
AQI
.
13-07-2025Time14-07-2025
TimeOntario
03 AM46
04 AM46
05 AM45
06 AM45
07 AM44
08 AM45
09 AM48
10 AM47
11 AM47
12 PM46
01 PM46
02 PM45
03 PM45
04 PM46
05 PM46
06 PM46
07 PM47
08 PM47
09 PM48
10 PM48
11 PM48
12 AM48
01 AM49
02 AM53
03 AM55
44
Min.at 7:09 AM on 13th Jul
55
Max.at 3:09 AM on 14th Jul

Want air quality data?

AQI Logo

Download 2024 Annual Data

World Air Quality Report

Globe

Ontario's Cities

Real-time Air Pollution Level

Location
Status
AQI
PM2.5(µg/m³)
PM10(µg/m³)
Temp.(°C)
Humi.(%)
Barrie
Moderate
70
19
21
21
80
Belleville
Moderate
61
15
18
21
81
Bluewater
Moderate
58
13
27
25
80
Brampton
Good
47
9
21
23
81
Brantford
Good
38
7
21
26
78
Burlington
Moderate
53
10
17
24
81
Central Elgin
Moderate
55
11
23
24
80
Chatham
Moderate
63
16
25
24
77
Cornwall
Good
26
4
14
21
86
Essa
Moderate
56
12
22
21
81
Grand Bend
Moderate
58
13
27
25
80
Greater Sudbury
Moderate
63
16
27
18
84
Guelph
Good
40
7
23
22
69
Hamilton
Good
44
8
19
25
80
Huntsville
Moderate
57
12
21
23
74
Kenora
Unhealthy
155
61
90
13
80
Kincardine
Moderate
63
16
27
22
85
Kingston
Good
47
8
16
20
84
Kitchener
Good
40
7
23
23
67
Lake of Bays
Moderate
57
12
21
23
74
London
Moderate
52
9
24
25
82
Loyalist
Good
28
5
16
21
90
Milton
Good
42
8
19
24
79
Mississauga
Moderate
51
9
17
23
79
Moonbeam
Moderate
66
17
39
18
86
Newmarket
Moderate
53
10
23
22
84
North Bay
Moderate
54
11
19
19
86
Oakville
Good
48
9
18
25
79
Oliver Paipoonge
Moderate
68
18
30
18
88
Oshawa
Moderate
54
11
20
24
80
Ottawa
Good
28
5
14
25
86
Parry Sound
Moderate
60
14
25
22
83
Petawawa
Good
45
8
26
20
86
Peterborough
Moderate
70
19
21
22
81
Pickle Lake
Poor
101
35
68
14
81
Sarnia
Moderate
63
15
28
27
78
Sault Ste. Marie
Moderate
86
28
63
19
85
Searchmont
Poor
120
43
78
18
83
St Catharines
Moderate
53
10
17
25
83
St Thomas
Moderate
55
11
23
24
80
Sudbury
Moderate
63
16
27
18
84
Temiskaming Shores
Moderate
52
10
23
19
86
Thunder Bay
Moderate
68
18
29
18
88
Tiverton
Moderate
63
16
27
22
85
Toronto
Moderate
51
10
19
24
79
Waterloo
Good
40
7
23
23
67
Windsor
Moderate
66
17
27
24
76

Canada's Metro Cities

Air Quality Index

Calgary City AQI

Calgary

25

temp.15°C

hum.88%
Edmonton City AQI

Edmonton

22

temp.18°C

hum.55%
Halifax City AQI

Halifax

19

temp.15°C

hum.93%
Montreal City AQI

Montreal

39

temp.23°C

hum.94%
Ottawa City AQI

Ottawa

28

temp.24°C

hum.100%
Toronto City AQI

Toronto

51

temp.26°C

hum.54%
Vancouver City AQI

Vancouver

20

temp.22°C

hum.83%
Windsor City AQI

Windsor

66

temp.26°C

hum.60%

Health Advice For People Living In

Ontario

0Cigarettes per day

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 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

Ontario

  • asthma due to air pollution in OntarioAsthma
  • heart due to air pollution in OntarioHeart Issues
  • allergy due to air pollution in OntarioAllergies
  • sinus due to air pollution in OntarioSinus
  • flu due to air pollution in OntarioCold/Flu
  • copd due to air pollution in OntarioChronic (COPD)
asthma due to air pollution in Ontario

Mid. Chances of Asthma

Asthma

Risk of Asthma symptoms is Mid. 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.

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

155
Unhealthy
10xabove Standard

2.

Searchmont, Canada

120
Poor
8xabove Standard

3.

Chapais, Canada

111
Poor
7xabove Standard

4.

Pickle Lake, Canada

101
Poor
7xabove Standard

5.

Oakbank, Canada

89
Moderate
6xabove Standard

6.

Sault Ste. Marie, Canada

86
Moderate
6xabove Standard

7.

Rosser, Canada

83
Moderate
6xabove Standard

8.

Thompson, Canada

81
Moderate
5xabove Standard

9.

Winnipeg, Canada

80
Moderate
5xabove Standard

10.

Barrie, Canada

70
Moderate
5xabove Standard

Last Updated: 14 Jul 2025, 06:21 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
air quality solutions for offices 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.

air quality solutions for smart-city 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.

air quality solutions for institutes 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.

air quality solutions for hotels 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.

air quality solutions for restaurants 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.

air quality solutions for rmc-plants 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.

air quality solutions for fitness-center 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.

air quality solutions for parking-lot 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.

air quality solutions for retail-stores 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.

air quality solutions for airport 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.

air quality solutions for construction-sites 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.

air quality solutions for hospitals 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.

air quality solutions for bathroom 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.

air quality solutions for banks for Ontario

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 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.

air quality solutions for real-estates 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
aqi air quality app for Ontario
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 Ontario

Frequently Asked Questions About Air Quality

What is the current AQI level in Ontario?

The current real-time AQI level in Ontario is 55 (Moderate). This was last updated 9 minutes ago (Local Time).

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

The best AQI level was 44 (Good) at 7:09 AM, Jul 13, 2025 (Local Time) during the last 24 hours.

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

The worst AQI level was 55 (Moderate) at 3:09 AM (Local Time) during the last 24 hours.

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

The AQI levels in Ontario have been fluctuating throughout the last 24 hours. The levels have increased by highest 55 at 3:09 AM (Local Time), lowest 44 at 7:09 AM, Jul 13, 2025 (Local Time).

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

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

Recent AQI Blogs

Read the latest news

Here are some latest blogs that you can go through to find out more air pollution.

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

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

7 Jul 2025Shakshi
Can Banning Old Vehicles Really Improve Delhi’s Air Quality? Here’s What the Data Says

Can Banning Old Vehicles Really Improve Delhi’s Air Quality? Here’s What the Data Says

4 Jul 2025Gyane Haobijam
Arizona Dust Storm 2025: How the Sudden Storm Pushed AQI to Hazardous Levels?

Arizona Dust Storm 2025: How the Sudden Storm Pushed AQI to Hazardous Levels?

2 Jul 2025Shakshi
Air Pollution Comparison Between England vs India: What a 45% Asthma Spike in the UK Reveals

Air Pollution Comparison Between England vs India: What a 45% Asthma Spike in the UK Reveals

1 Jul 2025Shakshi
Urban Heat Islands in India: The 2024 Climate Crisis in Metro Cities

Urban Heat Islands in India: The 2024 Climate Crisis in Metro Cities

24 Jun 2025Shakshi
Delhi AQI Drops After Months: How Rain Provided Temporary Relief in Pollution Levels 

Delhi AQI Drops After Months: How Rain Provided Temporary Relief in Pollution Levels 

19 Jun 2025Shakshi
AQI.IN Launched First Ever City-Level Climate Change Severity Index -June 2025

AQI.IN Launched First Ever City-Level Climate Change Severity Index -June 2025

19 Jun 2025Gyane Haobijam
Noise Pollution in Ocean: The Silent Threat Beneath the Waves

Noise Pollution in Ocean: The Silent Threat Beneath the Waves

17 Jun 2025Shakshi
Heat Alert in Delhi: “Feels Like” 49 °C Amid Heatwaves & Dust Storm

Heat Alert in Delhi: “Feels Like” 49 °C Amid Heatwaves & Dust Storm

10 Jun 2025Shakshi
Wildfire Smoke in Canada 2025: AQI Impact, Orange Skies, and What to Do

Wildfire Smoke in Canada 2025: AQI Impact, Orange Skies, and What to Do

9 Jun 2025Shakshi
Prana Air Logo

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
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.

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