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Waterloo Air Quality Index (AQI) | Air Pollution

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

Last Updated: 2026-07-19 02:31 (Local Time)

Live AQI

80AQI (US)

Air Quality is

Moderate

PM2.5 : 26 µg/m³

pm10 : 32 µg/m³

Good

050

Moderate

100

Poor

150

Unhealthy

200

Severe

300

Hazardous

301+

14 °C

Last Updated: 2026-07-19 02:31 (Local Time)

Rank284^th

Currently, Waterloo ranks 284^th among the cities with the highest AQI levels in the world.

Map

Waterloo

Major Air Pollutants
Waterloo

Particulate Matter(PM₂.₅)

26µg/m³

Particulate Matter(PM₁₀)

32µg/m³

Carbon Monoxide(CO)

283ppb

Sulfur Dioxide(SO₂)

2ppb

Nitrogen Dioxide(NO₂)

2ppb

Ozone(O₃)

25ppb

AQI Graph

Historical Air Quality Data
Waterloo

24 Hours

AQI (US)

Waterloo

AQI (US)

18-07-2026Time19-07-2026

Time	Waterloo
2:31am	185
3:01am	187
3:31am	190
4:01am	186
4:31am	185
5:01am	185
5:31am	181
6:01am	174
6:31am	172
7:01am	162
7:31am	152
8:01am	112
8:31am	99
9:01am	98
9:31am	96
10:01am	92
10:31am	86
11:01am	80
11:31am	76
12:01pm	72
12:31pm	74
1:01pm	72
1:31pm	70
2:01pm	60
2:31pm	60
3:01pm	84
3:31pm	102
4:01pm	108
4:31pm	117
5:01pm	123
5:31pm	130
6:01pm	149
6:31pm	145
7:01pm	154
7:31pm	148
8:01pm	152
8:31pm	152
9:01pm	152
9:31pm	148
10:01pm	149
10:31pm	136
11:01pm	88
11:31pm	78
12:01am	78
12:31am	78
1:01am	78
1:31am	85
2:01am	81
2:31am	80

Min. AQI (US)2:01pm

190

Max. AQI (US)3:31am

Want air quality data?

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

AQI (US)

Waterloo's Locations
Real-time Air Pollution Level

locations

Status

AQI (US)

PM₂.₅(µg/m³)

PM₁₀(µg/m³)

Temp.(°C)

Humi.(%)

Beechwood

Moderate

Kitchener

Moderate

Canada's Metro Cities
Air Quality Index

Calgary

Edmonton

Halifax

Montreal

Ottawa

Toronto

Vancouver

Windsor

113

temp.21°C

hum.69%

Air Quality Calendar 2026
Waterloo

2026

AQI (US)

Health Advice For People Living In
Waterloo

2.4Cigarettes per day

Weekly 16.8 Cigarettes

Monthly 72 Cigarettes

Breathing the air in this location is as harmful as smoking 2.4 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

Waterloo

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

Thunder Bay, Ontario

Poor

6xabove Standard

Trail, British Columbia

Poor

3xabove Standard

Castlegar, British Columbia

Poor

3xabove Standard

Hope, British Columbia

Poor

3xabove Standard

Windsor, Ontario

Poor

3xabove Standard

Parry Sound, Ontario

Poor

3xabove Standard

Prince George, British Columbia

Moderate

2xabove Standard

Vernon, British Columbia

Moderate

2xabove Standard

Brantford, Ontario

Moderate

2xabove Standard

10.

London, Ontario

Moderate

2xabove Standard

Last Updated: 19 Jul 2026, 06:37 AM

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

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

Waterloo's AQI Data Analytics Solutions
Air quality data monitoring platforms

Mobile App

Smart TV App

Web Dashboard

API

Widgets

Air Quality FAQs
at Waterloo

Frequently Asked Questions About Air Quality

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

The current real-time AQI (US) level in Waterloo is 80 (Moderate). This was last updated 2026-07-19 02:31 (Local Time).

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

The best AQI (US) level was 60 (Moderate) at 2:01 PM, Jul 18, 2026 (Local Time) during the last 24 hours.

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

The worst AQI (US) level was 190 (Unhealthy) at 3:31 AM, Jul 18, 2026 (Local Time) during the last 24 hours.

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

The AQI (US) levels in Waterloo have been fluctuating throughout the last 24 hours. The levels have increased by highest 190 at 3:31 AM, Jul 18, 2026 (Local Time), lowest 60 at 2:01 PM, Jul 18, 2026 (Local Time).

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

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