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Thunder Bay Air Quality Index (AQI) | Air Pollution

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

Last Updated: 2026-07-19 17:11:02 (Local Time)

Live AQI

59AQI (US)

Air Quality is

Moderate

PM2.5 : 16 µg/m³

pm10 : 18 µg/m³

Good

050

Moderate

100

Poor

150

Unhealthy

200

Severe

300

Hazardous

301+

26 °C

Last Updated: 2026-07-19 17:11:02 (Local Time)

Rank786^th

Currently, Thunder Bay ranks 786^th among the cities with the highest AQI levels in the world.

Map

Thunder Bay

Major Air Pollutants
Thunder Bay

Particulate Matter(PM₂.₅)

16µg/m³

Particulate Matter(PM₁₀)

18µg/m³

Carbon Monoxide(CO)

312ppb

Sulfur Dioxide(SO₂)

2ppb

Nitrogen Dioxide(NO₂)

4ppb

Ozone(O₃)

24ppb

AQI Graph

Historical Air Quality Data
Thunder Bay

24 Hours

AQI (US)

Thunder Bay

AQI (US)

18-07-2026Time19-07-2026

Time	Thunder Bay
5:31pm	134
6:01pm	116
6:31pm	125
7:01pm	105
7:31pm	114
8:01pm	104
8:31pm	102
9:01pm	96
9:31pm	99
10:01pm	142
10:31pm	136
11:01pm	147
11:31pm	143
12:01am	150
12:31am	154
1:01am	158
1:31am	162
2:01am	158
2:31am	147
3:01am	150
3:31am	141
4:01am	146
4:31am	153
5:01am	146
5:31am	150
6:01am	150
6:31am	150
7:01am	146
7:31am	144
8:01am	144
8:31am	144
9:01am	148
9:31am	150
10:01am	90
10:31am	136
11:01am	132
11:31am	136
12:01pm	131
12:31pm	135
1:01pm	69
1:31pm	128
2:01pm	128
2:31pm	131
3:01pm	124
3:31pm	124
4:01pm	121
4:31pm	118
5:01pm	63

Min. AQI (US)5:01pm

162

Max. AQI (US)1:31am

Want air quality data?

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

AQI (US)

Thunder Bay's Locations
Real-time Air Pollution Level

locations

Status

AQI (US)

PM₂.₅(µg/m³)

PM₁₀(µg/m³)

Temp.(°C)

Humi.(%)

James Street South

Moderate

Thunder Bay

Moderate

Canada's Metro Cities
Air Quality Index

Calgary

Edmonton

Halifax

Montreal

Ottawa

Toronto

Vancouver

Winnipeg

Air Quality Calendar 2026
Thunder Bay

2026

AQI (US)

Health Advice For People Living In
Thunder Bay

3.3Cigarettes per day

Weekly 23.1 Cigarettes

Monthly 99 Cigarettes

Breathing the air in this location is as harmful as smoking 3.3 cigarettes a day.

Source:

Berkeley Earth

Disclaimer: This cigarette-equivalent estimate is based on the average PM2.5 concentration over the last 24 hours, assuming continuous exposure during that time.

Solutions for Current AQI (US)

Air PurifierTurn On

Car FilterMust

N95 MaskMust

Stay IndoorMust

Prevent Health Problems: Understand Your Risks

Thunder Bay

Asthma

Heart Issues

Allergies

Sinus

Cold/Flu

Chronic (COPD)

Disclaimer: The above health risks are precautionary suggestions based on current AQI levels. You may not feel the effects immediately, but prolonged exposure to air pollution can contribute to these health conditions over time. AQI.IN is neither a medical expert nor a provider of medical advice. Please consult a doctor if you experience any of the above similar symptoms.

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

Fort St John, British Columbia

Unhealthy

7xabove Standard

Prince George, British Columbia

Unhealthy

5xabove Standard

Windsor, Ontario

Poor

3xabove Standard

Whitehorse, Yukon

Poor

3xabove Standard

Chatham, Ontario

Moderate

2xabove Standard

Grande Prairie, Alberta

Moderate

1xbelow Standard

Lethbridge, Alberta

Moderate

2xabove Standard

Sault Ste. Marie, Ontario

Moderate

2xabove Standard

Medicine Hat, Alberta

Moderate

1xabove Standard

10.

Fort McKay, Alberta

Moderate

1xabove Standard

Last Updated: 19 Jul 2026, 09:20 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

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

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 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

Air Quality FAQs
at Thunder Bay

Frequently Asked Questions About Air Quality

1. What is the current AQI (US) level in Thunder Bay?

The current real-time AQI (US) level in Thunder Bay is 59 (Moderate). This was last updated 2026-07-19 17:11:02 (Local Time).

2. When was the best AQI (US) level in Thunder Bay in the last 24 hours?

The best AQI (US) level was 63 (Moderate) at 5:01 PM (Local Time) during the last 24 hours.

3. When was the worst AQI (US) level in Thunder Bay in the last 24 hours?

The worst AQI (US) level was 162 (Unhealthy) at 1:31 AM (Local Time) during the last 24 hours.

4. What is the current trend of AQI (US) levels in Thunder Bay during last 24 hours?

The AQI (US) levels in Thunder Bay have been fluctuating throughout the last 24 hours. The levels have increased by highest 162 at 1:31 AM (Local Time), lowest 63 at 5:01 PM (Local Time).

5. What actions are recommended as per the current AQI (US) level in Thunder Bay?

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