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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: 2 minutes ago (Local Time)

location image
Live AQI
50
Air Quality is
Good
pm10 :  22 µg/m³
PM2.5 :  10 µg/m³
Good
050
Moderate
100
Poor
150
Unhealthy
200
Severe
300
Hazardous
301+
aqi good level.webp in Ontario
sunny

32 °C

Sunny
Humidity
Humidity45 %

Wind Speed
Wind Speed20 km/h

UV Index
UV Index1
Last Updated: 2 minutes ago (Local Time)
AQI LogoMap

Ontario

Major Air Pollutants

Ontario

PM2.5's Icon

Particulate Matter(PM2.5)

10µg/m³

PM10's Icon

Particulate Matter(PM10)

22µg/m³

CO's Icon

Carbon Monoxide(CO)

88ppb

SO2's Icon

Sulfur Dioxide(SO2)

1ppb

NO2's Icon

Nitrogen Dioxide(NO2)

4ppb

O3's Icon

Ozone(O3)

37ppb

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
.
11-07-2025Time12-07-2025
TimeOntario
08 PM48
09 PM47
10 PM46
11 PM47
12 AM47
01 AM47
02 AM47
03 AM48
04 AM50
05 AM49
06 AM47
07 AM46
08 AM47
09 AM49
10 AM48
11 AM48
12 PM48
01 PM48
02 PM48
03 PM49
04 PM50
05 PM50
06 PM51
07 PM50
08 PM50
46
Min.at 10:09 PM on 11th Jul
51
Max.at 6:09 PM on 12th 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
53
10
20
22
86
Belleville
Good
42
8
18
21
84
Bluewater
Good
47
8
17
23
87
Brampton
Moderate
52
10
23
23
86
Brantford
Moderate
51
9
20
23
87
Burlington
Good
46
8
20
24
84
Central Elgin
Good
46
8
20
23
87
Chatham
Good
37
7
20
24
87
Cornwall
Good
50
9
14
22
80
Essa
Moderate
52
10
23
21
87
Grand Bend
Good
47
8
17
23
87
Greater Sudbury
Good
48
9
17
18
87
Guelph
Good
45
8
18
21
87
Hamilton
Good
47
9
20
24
84
Huntsville
Good
45
8
19
20
87
Kenora
Unhealthy
153
58
117
17
87
Kincardine
Good
48
9
22
22
86
Kingston
Good
47
8
19
21
82
Kitchener
Good
47
8
19
21
87
Lake of Bays
Good
45
8
19
20
87
London
Good
46
8
19
22
87
Loyalist
Good
48
9
19
21
82
Milton
Moderate
53
10
20
23
85
Mississauga
Good
46
8
19
24
82
Moonbeam
Good
38
7
13
18
87
Newmarket
Moderate
55
11
22
21
87
North Bay
Good
43
8
14
19
88
Oakville
Moderate
52
10
24
25
84
Oliver Paipoonge
Good
34
6
14
17
88
Oshawa
Good
50
10
20
24
84
Ottawa
Good
48
9
15
23
78
Parry Sound
Good
50
9
18
21
86
Petawawa
Good
48
9
16
19
87
Peterborough
Good
48
8
20
21
87
Pickle Lake
Poor
126
46
76
16
85
Sarnia
Good
38
7
18
24
87
Sault Ste. Marie
Moderate
52
10
22
18
88
Searchmont
Poor
147
54
114
17
88
St Catharines
Good
46
8
19
27
82
St Thomas
Good
46
8
20
23
87
Sudbury
Good
49
9
17
18
87
Temiskaming Shores
Good
44
8
17
18
87
Thunder Bay
Good
38
7
13
18
88
Tiverton
Good
48
9
22
22
86
Toronto
Moderate
51
10
21
26
83
Waterloo
Good
47
8
19
21
87
Windsor
Good
45
8
24
24
86

Canada's Metro Cities

Air Quality Index

Calgary City AQI

Calgary

26

temp.28°C

hum.23%
Edmonton City AQI

Edmonton

25

temp.26°C

hum.31%
Halifax City AQI

Halifax

28

temp.17°C

hum.82%
Montreal City AQI

Montreal

53

temp.31°C

hum.49%
Ottawa City AQI

Ottawa

47

temp.30°C

hum.66%
Toronto City AQI

Toronto

52

temp.34°C

hum.39%
Vancouver City AQI

Vancouver

20

temp.24°C

hum.69%
Windsor City AQI

Windsor

45

temp.27°C

hum.77%

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 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

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

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

153
Unhealthy
10xabove Standard

2.

Searchmont, Canada

147
Poor
10xabove Standard

3.

Pickle Lake, Canada

126
Poor
8xabove Standard

4.

Chapais, Canada

85
Moderate
6xabove Standard

5.

Regina, Canada

69
Moderate
5xabove Standard

6.

Estevan, Canada

68
Moderate
5xabove Standard

7.

Auclair, Canada

68
Moderate
5xabove Standard

8.

Thompson, Canada

68
Moderate
5xabove Standard

9.

Bratts Lake No 129, Canada

67
Moderate
4xabove Standard

10.

Pinehouse, Canada

67
Moderate
4xabove Standard

Last Updated: 12 Jul 2025, 11:13 PM

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 50 (Good). This was last updated 2 minutes ago (Local Time).

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

The best AQI level was 46 (Good) at 10:09 PM, Jul 11, 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 51 (Moderate) at 6:09 PM (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 remained stable over the last 24 hours as around 46.28 .

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

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.

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
Prana Air Logo

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