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Thunder Bay Air Quality Index (AQI) | Air Pollution

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

Last Updated: 2025-08-02 01:40:16 PM (Local Time)

location image
Live AQI
156(AQI-US)
Air Quality is
Unhealthy
pm10 :  59 µg/m³
PM2.5 :  62 µg/m³
Good
050
Moderate
100
Poor
150
Unhealthy
200
Severe
300
Hazardous
301+
aqi unhealthy level.webp in Thunder Bay
overcast

23 °C

Overcast
Humidity
Humidity65 %

Wind Speed
Wind Speed13 km/h

UV Index
UV Index5
Last Updated: 2025-08-02 01:40:16 PM (Local Time)


Map

Thunder Bay

Major Air Pollutants

Thunder Bay

AQI Graph

Historical Air Quality Data

Thunder Bay

Thunder Bay
AQI
.
01-08-2025Time02-08-2025
143
Min.at 11:10 AM on 2nd Aug
165
Max.at 7:10 PM on 1st Aug

Download 2024 Annual Data

World Air Quality Report

Globe

AQI Trends - Annual Air Quality Changes

Thunder Bay, Ontario, Canada

Year
.
AQI


Annual AQI Trends

2020
27AQI
2021
31AQI
15%
Rise
2022
27AQI
-13%
Fall
2023
29AQI
7%
Rise
2024
30AQI
3%
Rise
2025
31AQI
3%
Rise
Overall Annual Percentage (%) change of AQI in (2020 to 2025)
3%
Rise (Worsened AQI)

Most & Least Polluted Months

Most PollutedAugust, 2025157AQI

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.(%)
Unhealthy
156
62
59
18
71
Unhealthy
156
62
59
18
71

Canada's Metro Cities

Air Quality Index

Health Advice For People Living In

Thunder Bay

2.9Cigarettes per day

Cigarette
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

  • 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

Thunder Bay

  • asthma due to air pollution in Thunder BayAsthma
  • heart due to air pollution in Thunder BayHeart Issues
  • allergy due to air pollution in Thunder BayAllergies
  • sinus due to air pollution in Thunder BaySinus
  • flu due to air pollution in Thunder BayCold/Flu
  • copd due to air pollution in Thunder BayChronic (COPD)
asthma due to air pollution in Thunder Bay

High Chances of Asthma

Asthma

Risk of Asthma symptoms is High when AQI is Unhealthy (150-301)

Severe symptoms including intense wheezing, severe shortness of breath, significant chest tightness, and persistent coughing that may disrupt daily activities.

Do's :

  • Avoid going outside and keep windows closed to reduce exposure to pollutants.

  • Take prescribed medications as directed by your healthcare provider.

  • Maintain clean indoor air with air purifiers, especially in bedrooms and living areas.

Don'ts :

  • Smoke or expose yourself to secondhand smoke.

  • Engage in physical exertion outdoors.

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 2025

Canada

Analyze the real-time most air polluted cities in the country.

Thunder Bay's AQI Data Analytics Solutions

Air quality data monitoring platforms

Mobile AppMobile App
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aqi air quality app for Thunder Bay
Mobile App

Empower Your Decisions with Reliable Data

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 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 156 (Unhealthy). This was last updated 2025-08-02 01:40:16 PM (Local Time).

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

The best AQI level was 143 (Poor) at 11:10 AM (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 165 (Unhealthy) at 7:10 PM, Aug 1, 2025 (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 165 at 7:10 PM, Aug 1, 2025 (Local Time), lowest 143 at 11:10 AM (Local Time).

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

Current AQI levels are unhealthy for everyone. It's advised to limit outdoor activities and consider using air purifiers indoors.