• Skip to primary navigation
  • Skip to main content
  • Skip to primary sidebar

Reviews of Air Purifiers

Find the right air purifier for you

  • Top Rated
    • Levoit Core 300
    • Levoit Core 400S
    • Coway Airmega 300
    • Blueair Blue Pure 211+
    • Medify MA-40 v2.0
    • Rabbit Air MinusA2
    • Alen BreatheSmart Flex
    • Bissell Air320
    • Molekule Air Mini
    • IQAir HealthPro Plus
    • AirDoctor 3000
    • Dyson Pure Cool TP04
    • TruSens Z-3000
  • By Concern
    • Smart Sensors and App Control
    • Low Noise
    • High CADR for Large Spaces
    • H13 HEPA for Highest Purification
    • For Classrooms in School
    • 100% Ozone-Free (no electronic add-ons)
    • VOCs & Chemicals
    • Smoke form Tobacco or Wildfire
    • Kitchen Odors and Pollutants
    • UV with HEPA
    • ENERGY STAR-Certified
    • Small Desktop-grade
    • Suitable For Car Cabins
    • Traffic Pollution
    • HEPA Air Scrubber for Commercial Use
  • By Brand
    • Blueair
    • GermGuardian
    • Honeywell
    • Levoit
  • Combo
    • Air Purifier + Fan
    • Air Purifier + Humidifier
    • Air Purifier + Heater
    • Air Purifier + Essential Oil Diffuser
    • Air Purifier + Dehumidifier
  • Tools
    • CADR Calculator: Find Clean Air Delivery Rate
    • Air Changes Per Hour Calculator: Find ACH
    • Air Purifier Electricity Consumption Calculator in kWh & Cost($)
    • Air Purifier Calculator for School
  • Air Quality Monitors
    • The 7 Best Air Quality Monitor
    • The 7 Best Radon Detector
  • Blog
    • How to Choose an Air Purifier
    • Best Ways to Use an Air Purifier
    • Common Issues in Air Purifiers with Fix
    • How to Deep Clean an Air Purifier

Ad-free. Influence-free. Reader-supported.

You are here: Home / Healthy Breathing / Air Quality Index (AQI) Explained

Air Quality Index (AQI) Explained

Updated on October 17, 2019 By Musfikur Rahman · Leave a Comment

Share

Air Quality Index or AQI is an indicator to understand the quality of air. It shows the pollution status in the air with a numeric scale ranges from 0 to 500 as well as with different color indicators. The index represents how clean or polluted the air is in a specific area. Polluted air can bring about health concerns; hence, it is necessary to keep watch on AQI to reduce the exposure in air pollution. Five pollutants are usually taken into consideration to generate the air quality index. They include particulate matters (PM), ground-level ozone (O3), carbon monoxide (CO), sulfur dioxide (SO2), and nitrogen dioxide (NO2).

Air Quality Index AQI chart

How AQI works

AQI runs on a scale of 0 to 500 and also indicated by colors. Lower AQI value represents the clean air, and a higher AQI value represents the polluted air. An AQI below 50 is considered a good quality of air, and it becomes unhealthy when it crosses 100. If the AQI is more than 200, then the pollution level is very high. An AQI of 300 and up indicates dangerous air quality.

EPA works to establish national air quality standards as a way of controlling air pollution. The table below shows the AQI category, index values, and the breakpoints for different pollutants for a while.

Data source: EPA AQI Breakpoints
Read our reviews on Best Air Quality Monitors

Understanding the AQI

The main aim of AQI is to help you master the air quality in your local area. You will get to know the AQI levels from the colors which are used to depict them. Here are some of the colors and the air pollutions levels indicated:

Good: The green color indicates it. The AQI levels are below 50. It is a state which indicates good air quality. There is low pollution and there at risk at this stage.

Moderate: The level is indicated by yellow color and ranges from 51 – 100. In this condition, there is tolerant pollution. There is no high risk to the environment at this stage.

Unhealthy for sensitive groups: Some people are vulnerable to air quality. They will start developing complications when the air quality reaches between 101 and 150. It is indicated by orange on the AQI levels.

Unhealthy: It is a condition where the experts consider the air quality is unhealthy. It ranges from 151 to 200 AQI. The color red indicates the air condition is at harmful levels. Something should be taken to purify the air before your family members can breathe it.

Very unhealthy: At this stage, the AQI level swill indicates purple. It ranges from 201 to 300 AQI. The condition can pose several risks to human beings. Experts warn of several pollutants in the air.

Hazardous: In this stage, the AQI will range between 301 and 500. It indicates by maroon color. At this stage, there are a lot of particles in the air that pose a danger to human life.

The different colors used to explain AQI should be taken into consideration in your air quality monitoring. The experts are careful to offer the information so that you can reduce the health risk from breathing polluted air.

Share

Filed Under: Healthy Breathing

You May Also Like

Improve Indoor Air Quality During Winter
How to Improve Indoor Air Quality During Winter: 7 Useful Tips
9 Types of Indoor Air Pollutants
9 Types of Indoor Air Pollutants: Sources, Health Effects & Removal Tips
How to Get Rid of Cigarette Smell in Apartment
How to Get Rid of Cigarette Smell in Apartment

Musfikur Rahman

A former smoker, who has become a clean air enthusiast, created this blog to review different types of air purifiers so that you can make an informed decision.

Reader Interactions

Leave a Reply Cancel reply

Your email address will not be published. Required fields are marked *

Primary Sidebar

Popular Posts

Air Quality Index (AQI)

Primary pollutant:

Temperature (°F):

Humidity (%):

Updated on:

Courtesy: World AQI Project

0-50 51-100 101-150
Learn more about the AQI
How to select an air purifier CADR Calculator Best Ways to use an Air Purifier

Home · About · Contact · Disclaimer

Copyright © 2023 · ReviewsofAirPurifiers.com

ReviewsofAirPurifiers.com is a participant in the Amazon Services LLC Associates Program. As Amazon Associates, we earn from qualifying purchases. ReviewsofAirPurifiers.com also participates in affiliate programs with CJ, Impact, ShareASale, and other sites.