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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: 2026-07-18 18:41:01 (Local Time)

Live AQI

109AQI (US)

Air Quality is

Poor

PM2.5 : 39 µg/m³

pm10 : 44 µg/m³

Good

050

Moderate

100

Poor

150

Unhealthy

200

Severe

300

Hazardous

301+

26 °C

Last Updated: 2026-07-18 18:41:01 (Local Time)

Rank133^rd

Currently, Thunder Bay ranks 133^rd among the most polluted cities globally.

Map

Thunder Bay

Major Air Pollutants
Thunder Bay

Particulate Matter(PM₂.₅)

39µg/m³

Particulate Matter(PM₁₀)

44µg/m³

Carbon Monoxide(CO)

186ppb

Sulfur Dioxide(SO₂)

2ppb

Nitrogen Dioxide(NO₂)

6ppb

Ozone(O₃)

42ppb

AQI Graph

Historical Air Quality Data
Thunder Bay

24 Hours

AQI (US)

Thunder Bay

AQI (US)

17-07-2026Time18-07-2026

Time	Thunder Bay
7:01pm	124
7:31pm	188
8:01pm	169
8:31pm	169
9:01pm	179
9:31pm	170
10:01pm	153
10:31pm	139
11:01pm	153
11:31pm	144
12:01am	150
12:31am	150
1:01am	133
1:31am	140
2:01am	135
2:31am	136
3:01am	126
3:31am	124
4:01am	126
4:31am	124
5:01am	122
5:31am	122
6:01am	128
6:31am	123
7:01am	130
7:31am	126
8:01am	65
8:31am	64
9:01am	59
9:31am	64
10:01am	65
10:31am	66
11:01am	70
11:31am	71
12:01pm	96
12:31pm	100
1:01pm	118
1:31pm	105
2:01pm	128
2:31pm	129
3:01pm	136
3:31pm	145
4:01pm	142
4:31pm	138
5:01pm	129
5:31pm	134
6:01pm	116
6:31pm	125

Min. AQI (US)9:01am

188

Max. AQI (US)7:31pm

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

Poor

124

Thunder Bay

Poor

126

Canada's Metro Cities
Air Quality Index

Calgary

Edmonton

Halifax

Ottawa

Toronto

Vancouver

Windsor

Winnipeg

Air Quality Calendar 2026
Thunder Bay

2026

AQI (US)

Health Advice For People Living In
Thunder Bay

2.9Cigarettes per day

Weekly 20.3 Cigarettes

Monthly 87 Cigarettes

Breathing the air in this location is as harmful as smoking 2.9 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

Waterloo, Ontario

Unhealthy

5xabove Standard

Newmarket, Ontario

Unhealthy

5xabove Standard

Guelph, Ontario

Unhealthy

4xabove Standard

Toronto, Ontario

Unhealthy

4xabove Standard

Oshawa, Ontario

Poor

4xabove Standard

Thunder Bay, Ontario

Poor

3xabove Standard

Brantford, Ontario

Poor

3xabove Standard

London, Ontario

Poor

2xabove Standard

Lethbridge, Alberta

Moderate

2xabove Standard

10.

Peterborough, Ontario

Moderate

2xabove Standard

Last Updated: 18 Jul 2026, 10:49 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 109 (Poor). This was last updated 2026-07-18 18:41:01 (Local Time).

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

The best AQI (US) level was 59 (Moderate) at 9:01 AM (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 188 (Unhealthy) at 7:31 PM, Jul 17, 2026 (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 188 at 7:31 PM, Jul 17, 2026 (Local Time), lowest 59 at 9:01 AM (Local Time).

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

Current AQI (US) levels are unhealthy for Sensitive individuals, they should reduce prolonged or heavy outdoor exertion.