AQI PM2.5 PM10 CO SO2 NO2 O3

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Waterloo Air Quality Index (AQI) | Air Pollution

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

Last Updated: 2025-06-03 04:54:34 PM (Local Time)

Live AQI

Air Quality is

Moderate

pm10 : 27 µg/m³

PM2.5 : 10 µg/m³

Good

050

Moderate

100

Poor

150

Unhealthy

200

Severe

300

Hazardous

301+

27 °C

Last Updated: 2025-06-03 04:54:34 PM (Local Time)

Map

Waterloo

Major Air Pollutants
Waterloo

Particulate Matter(PM2.5)

10µg/m³

Particulate Matter(PM10)

27µg/m³

Carbon Monoxide(CO)

69ppb

Sulfur Dioxide(SO2)

1ppb

Nitrogen Dioxide(NO2)

6ppb

Ozone(O3)

50ppb

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AQI Graph

Historical Air Quality Data
Waterloo

24 Hours

AQI

Waterloo

Want air quality data?

AQI Trends - Annual Air Quality Changes
Waterloo, Ontario, Canada

AQI

Year

AQI

Annual AQI Trends

2020

31AQI

2021

36AQI

16%

Rise

2022

34AQI

-6%

Fall

2023

41AQI

21%

Rise

2024

32AQI

-22%

Fall

2025

31AQI

-3%

Fall

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

Rise (Worsened AQI)

Most & Least Polluted Months

Most PollutedJune, 202370AQI

Least PollutedAugust, 202225AQI

* This data analysis is from year 2020 - 2025

Waterloo's Locations
Real-time Air Pollution Level

Location

Status

AQI

PM2.5(µg/m³)

PM10(µg/m³)

Temp.(°C)

Humi.(%)

Kitchener

Moderate

Canada's Metro Cities
Air Quality Index

Calgary

Edmonton

Halifax

Montreal

Ottawa

Toronto

West Vancouver

Windsor

Air Quality Calendar 2025
Waterloo

2025

AQI

January

Sun.	Mon.	Tue.	Wed.	Thu.	Fri.	Sat.
29 Dec -	30 Dec -	31 Dec -	1 Jan 24	2 Jan 27	3 Jan 25	4 Jan 25
5 Jan 24	6 Jan 23	7 Jan 28	8 Jan 32	9 Jan 42	10 Jan 42	11 Jan 47
12 Jan 42	13 Jan 30	14 Jan 29	15 Jan 28	16 Jan 40	17 Jan 34	18 Jan 25
19 Jan 25	20 Jan 25	21 Jan 24	22 Jan 29	23 Jan 37	24 Jan 34	25 Jan 41
26 Jan 28	27 Jan 26	28 Jan 29	29 Jan 27	30 Jan 33	31 Jan 47	1 Feb 26

February

Sun.	Mon.	Tue.	Wed.	Thu.	Fri.	Sat.
26 Jan 28	27 Jan 26	28 Jan 29	29 Jan 27	30 Jan 33	31 Jan 47	1 Feb 26
2 Feb 36	3 Feb 48	4 Feb 26	5 Feb 27	6 Feb 33	7 Feb 27	8 Feb 35
9 Feb 32	10 Feb 33	11 Feb 37	12 Feb 31	13 Feb 35	14 Feb 37	15 Feb 39
16 Feb 29	17 Feb 29	18 Feb 27	19 Feb 27	20 Feb 26	21 Feb 38	22 Feb 52
23 Feb 60	24 Feb 45	25 Feb 43	26 Feb 31	27 Feb 35	28 Feb 26	1 Mar 29

March

Sun.	Mon.	Tue.	Wed.	Thu.	Fri.	Sat.
23 Feb 60	24 Feb 45	25 Feb 43	26 Feb 31	27 Feb 35	28 Feb 26	1 Mar 29
2 Mar 30	3 Mar 41	4 Mar 38	5 Mar 33	6 Mar 26	7 Mar 30	8 Mar 31
9 Mar 28	10 Mar 30	11 Mar 30	12 Mar 29	13 Mar 44	14 Mar 54	15 Mar 52
16 Mar 25	17 Mar 21	18 Mar 28	19 Mar 30	20 Mar 25	21 Mar 22	22 Mar 22
23 Mar 23	24 Mar 23	25 Mar 24	26 Mar 26	27 Mar 33	28 Mar 40	29 Mar 38
30 Mar 24	31 Mar 23	1 Apr 29	2 Apr 26	3 Apr 23	4 Apr 29	5 Apr 30

April

Sun.	Mon.	Tue.	Wed.	Thu.	Fri.	Sat.
30 Mar 24	31 Mar 23	1 Apr 29	2 Apr 26	3 Apr 23	4 Apr 29	5 Apr 30
6 Apr 28	7 Apr 26	8 Apr 24	9 Apr 34	10 Apr 44	11 Apr 46	12 Apr 45
13 Apr 45	14 Apr 31	15 Apr 23	16 Apr 33	17 Apr 38	18 Apr 45	19 Apr 34
20 Apr 33	21 Apr 22	22 Apr 29	23 Apr 37	24 Apr 35	25 Apr 28	26 Apr 24
27 Apr 24	28 Apr 33	29 Apr 29	30 Apr 29	1 May 30	2 May 26	3 May 19

May

Sun.	Mon.	Tue.	Wed.	Thu.	Fri.	Sat.
27 Apr 24	28 Apr 33	29 Apr 29	30 Apr 29	1 May 30	2 May 26	3 May 19
4 May 28	5 May 25	6 May 30	7 May 39	8 May 22	9 May 31	10 May 37
11 May 31	12 May 38	13 May 40	14 May 33	15 May 39	16 May 32	17 May 23
18 May 19	19 May 20	20 May 19	21 May 18	22 May 17	23 May 21	24 May 20
25 May 23	26 May 29	27 May 27	28 May 29	29 May 31	30 May 40	31 May 38

June

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

Health Advice For People Living In
Waterloo

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 On
Car FilterMust
N95 MaskMust
Stay IndoorMust

Must turn on the air purifier to enjoy fresh air.

Prevent Health Problems: Understand Your Risks

Waterloo

Asthma
Heart Issues
Allergies
Sinus
Cold/Flu
Chronic (COPD)

Mid. Chances of Asthma

Asthma

Risk of Asthma symptoms is Mid. when AQI is Moderate (50-150)

Moderate symptoms including frequent wheezing, noticeable shortness of breath, chest tightness, and persistent cough.

Do's :

Limit outdoor activities when AQI is poor.
Clean indoor air with an air purifier to reduce exposure.
Soothe the respiratory tract with herbal teas or warm water to help alleviate symptoms.

Don'ts :

Exercise outdoors without a mask.
Stay in smoky areas with strong fumes.

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

Pinehouse, Canada

Moderate

5xabove Standard

Sault Ste. Marie, Canada

Searchmont, Canada

Thompson, Canada

Kenora, Canada

Grand Forks, Canada

Flin Flon, Canada

Flin Flon, Canada

Pickle Lake, Canada

10.

Fort St. John, Canada

Moderate

4xabove Standard

Last Updated: 03 Jun 2025, 08:22 PM

AQI City Rankings

Air Quality Solutions For Waterloo
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 Waterloo

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 Waterloo

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 Waterloo

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 Waterloo

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.

Waterloo'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 Waterloo

Frequently Asked Questions About Air Quality

What is the current AQI level in Waterloo?

The current real-time AQI level in Waterloo is 52 (Moderate). This was last updated 2025-06-03 04:54:34 PM (Local Time).

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

The best AQI level was 44 (Good) at 3:24 PM, Jun 2, 2025 (Local Time) during the last 24 hours.

When was the worst AQI level in Waterloo in the last 24 hours?

The worst AQI level was 52 (Moderate) at 2:09 PM (Local Time) during the last 24 hours.

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

The AQI levels in Waterloo have been fluctuating throughout the last 24 hours. The levels have increased by highest 52 at 2:09 PM (Local Time), lowest 44 at 3:24 PM, Jun 2, 2025 (Local Time).

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

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