PM2.5 dust air quality level International Standard

2020-05-27 11:42
PM2.5 particles in the air Particulate Matter Real-time Air Quality Index

Index Values/PM2.5
Revised Breakpoints   (µg/m3, 24-hour average)
0 - 50
0.0 – 12.0
51 - 100
12.1 – 35.4
Unhealthy for Sensitive Groups
101 – 150
35.5 – 55.4
more than 55.5


Research indicates 96 percent of homes have at least one type of indoor air quality issue. An indoor air quality (IAQ) monitor will report on the levels of common pollutants and other air conditions inside your home in real time.

The culprit could be anything from excessive dust to high humidity to emissions from household cleaners or building materials. The problem is, most people don’t know there’s a problem, and if they do figure it out—usually tipped off by allergy-like symptoms or more dramatic health effects—they don’t know precisely which pollutant is causing it.

Some indoor air-quality monitors will also track outdoor air quality to provide context for your indoor readings. The measurements are then displayed on a screen on the device itself as well as in a companion app on your mobile device. Most IAQ monitors will alert you to unsafe levels via an indicator light and/or push notifications to your smartphone or tablet.

Once you’re aware something has risen to hazardous a level, you can take action to reduce it—usually by opening some windows. Some monitors will even trigger other smart appliances—such as an air purifier, a fan, or a dehumidifier—to help improve the air quality. Ultimately, a good IAQ monitor should provide enough clues for you to investigate and eliminate the source of your air quality woes.