AQI PM2.5 PM10 CO SO2 NO2 O3

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Thunder Bay Air Quality Index (AQI) | Air Pollution

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

Last Updated: 2025-05-26 03:55:44 PM (Local Time)

Live AQI

Air Quality is

Good

pm10 : 11 µg/m³

PM2.5 : 3 µg/m³

Good

050

Moderate

100

Poor

150

Unhealthy

200

Severe

300

Hazardous

301+

20 °C

Last Updated: 2025-05-26 03:55:44 PM (Local Time)

Map

Thunder Bay

Major Air Pollutants
Thunder Bay

Particulate Matter(PM2.5)

3µg/m³

Particulate Matter(PM10)

11µg/m³

Carbon Monoxide(CO)

108ppb

Sulfur Dioxide(SO2)

1ppb

Nitrogen Dioxide(NO2)

2ppb

Ozone(O3)

30ppb

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AQI Graph

Historical Air Quality Data
Thunder Bay

24 Hours

AQI

Thunder Bay

Want air quality data?

AQI Trends - Annual Air Quality Changes
Thunder Bay, Ontario, Canada

AQI

Year

AQI

Annual AQI Trends

2020

27AQI

2021

31AQI

15%

Rise

2022

27AQI

-13%

Fall

2023

29AQI

Rise

2024

30AQI

Rise

2025

24AQI

-20%

Fall

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

-2%

Fall (Improved AQI)

Most & Least Polluted Months

Most PollutedSeptember, 202457AQI

Least PollutedNovember, 202418AQI

* This data analysis is from year 2020 - 2025

Thunder Bay's Locations
Real-time Air Pollution Level

Location

Status

AQI

PM2.5(µg/m³)

PM10(µg/m³)

Temp.(°C)

Humi.(%)

James Street South

Good

Thunder Bay

Good

Canada's Metro Cities
Air Quality Index

Calgary

Edmonton

Halifax

Montreal

Ottawa

Toronto

West Vancouver

Windsor

Air Quality Calendar 2025
Thunder Bay

2025

AQI

January

Sun.	Mon.	Tue.	Wed.	Thu.	Fri.	Sat.
29 Dec -	30 Dec -	31 Dec -	1 Jan 18	2 Jan 22	3 Jan 24	4 Jan 26
5 Jan 26	6 Jan 24	7 Jan 24	8 Jan 24	9 Jan 34	10 Jan 41	11 Jan 25
12 Jan 23	13 Jan 23	14 Jan 25	15 Jan 29	16 Jan 26	17 Jan 26	18 Jan 26
19 Jan 26	20 Jan 24	21 Jan 27	22 Jan 27	23 Jan 25	24 Jan 28	25 Jan 32
26 Jan 28	27 Jan 29	28 Jan 24	29 Jan 26	30 Jan 27	31 Jan 27	1 Feb 25

February

Sun.	Mon.	Tue.	Wed.	Thu.	Fri.	Sat.
26 Jan 28	27 Jan 29	28 Jan 24	29 Jan 26	30 Jan 27	31 Jan 27	1 Feb 25
2 Feb 28	3 Feb 27	4 Feb 24	5 Feb 23	6 Feb 25	7 Feb 26	8 Feb 27
9 Feb 29	10 Feb 30	11 Feb 36	12 Feb 45	13 Feb 28	14 Feb 34	15 Feb 26
16 Feb 22	17 Feb 22	18 Feb 22	19 Feb 27	20 Feb 25	21 Feb 28	22 Feb 32
23 Feb 34	24 Feb 35	25 Feb 25	26 Feb 31	27 Feb 24	28 Feb 26	1 Mar 29

March

Sun.	Mon.	Tue.	Wed.	Thu.	Fri.	Sat.
23 Feb 34	24 Feb 35	25 Feb 25	26 Feb 31	27 Feb 24	28 Feb 26	1 Mar 29
2 Mar 29	3 Mar 37	4 Mar 34	5 Mar 28	6 Mar 28	7 Mar 27	8 Mar 26
9 Mar 30	10 Mar 25	11 Mar 29	12 Mar 25	13 Mar 25	14 Mar 28	15 Mar 63
16 Mar 19	17 Mar 23	18 Mar 18	19 Mar 25	20 Mar 19	21 Mar 21	22 Mar 26
23 Mar 26	24 Mar 20	25 Mar 24	26 Mar 26	27 Mar 18	28 Mar 19	29 Mar 16
30 Mar 17	31 Mar 17	1 Apr 21	2 Apr 18	3 Apr 17	4 Apr 22	5 Apr 17

April

Sun.	Mon.	Tue.	Wed.	Thu.	Fri.	Sat.
30 Mar 17	31 Mar 17	1 Apr 21	2 Apr 18	3 Apr 17	4 Apr 22	5 Apr 17
6 Apr 18	7 Apr 15	8 Apr 16	9 Apr 20	10 Apr 29	11 Apr 34	12 Apr 36
13 Apr 47	14 Apr 29	15 Apr 14	16 Apr 16	17 Apr 18	18 Apr 23	19 Apr 16
20 Apr 20	21 Apr 14	22 Apr 18	23 Apr 15	24 Apr 15	25 Apr 17	26 Apr 17
27 Apr 22	28 Apr 25	29 Apr 16	30 Apr 15	1 May 18	2 May 17	3 May 15

May

Sun.	Mon.	Tue.	Wed.	Thu.	Fri.	Sat.
27 Apr 22	28 Apr 25	29 Apr 16	30 Apr 15	1 May 18	2 May 17	3 May 15
4 May 16	5 May 20	6 May 26	7 May 18	8 May 17	9 May 26	10 May 20
11 May 17	12 May 26	13 May 36	14 May 33	15 May 25	16 May 24	17 May 16
18 May 17	19 May 14	20 May 14	21 May 17	22 May 14	23 May 12	24 May 15
25 May -	26 May -	27 May -	28 May -	29 May -	30 May -	31 May -

Health Advice For People Living In
Thunder Bay

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

Thunder Bay

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

Searchmont, Canada

Steeper, Canada

Trois-Rivieres, Canada

Good

2xabove Standard

Drummondville, Canada

Beaverlodge, Canada

Joussard, Canada

Calgary, Canada

Drayton Valley, Canada

Kenora, Canada

10.

Elkford, Canada

Good

2xabove Standard

Last Updated: 26 May 2025, 07:03 PM

AQI City Rankings

Air Quality Solutions For Thunder Bay
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 Thunder Bay

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 Thunder Bay

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 Thunder Bay

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 Thunder Bay

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.

Thunder Bay'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 Thunder Bay

Frequently Asked Questions About Air Quality

What is the current AQI level in Thunder Bay?

The current real-time AQI level in Thunder Bay is 18 (Good). This was last updated 2025-05-26 03:55:44 PM (Local Time).

When was the best AQI level in Thunder Bay in the last 24 hours?

The best AQI level was 14 (Good) at 5:10 PM, May 25, 2025 (Local Time) during the last 24 hours.

When was the worst AQI level in Thunder Bay in the last 24 hours?

The worst AQI level was 22 (Good) at 8:10 AM (Local Time) during the last 24 hours.

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

The AQI levels in Thunder Bay have been fluctuating throughout the last 24 hours. The levels have increased by highest 22 at 8:10 AM (Local Time), lowest 14 at 5:10 PM, May 25, 2025 (Local Time).

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

The air quality is satisfactory, and air pollution poses little or no risk. No special precautions are needed; enjoy outdoor activities freely.