2024.10.4
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Air quality

The Air quality integrationIntegrations connect and integrate Home Assistant with your devices, services, and more. [Learn more] allows other integrations to process information about air quality and pollution details. It is used by integrations that provide an air_quality sensor - you can find those under the health integrations.

The platforms cover the following levels (if they are available):

  • The particulate matter 0.1 (<= 0.1 μm) level.
  • The particulate matter 2.5 (<= 2.5 μm) level.
  • The particulate matter 10 (<= 10 μm) level.
  • The Air Quality Index (AQI).
  • The O3 (ozone) level.
  • The CO (carbon monoxide) level.
  • The CO2 (carbon dioxide) level.
  • The SO2 (sulphur dioxide) level.
  • The N2O (nitrogen oxide) level.
  • The NO (nitrogen monoxide) level.
  • The NO2 (nitrogen dioxide) level.

Note

Building block integration

This air quality is a building block integration that cannot be added to your Home Assistant directly but is used and provided by other integrations.

A building block integration differs from the typical integration that connects to a device or service. Instead, other integrations that do integrate a device or service into Home Assistant use this air quality building block to provide entities, services, and other functionality that you can use in your automations or dashboards.

If one of your integrations features this building block, this page documents the functionality the air quality building block offers.

The state of an air quality entity

The state of an air quality entity represents the concentration of particles in the air that are 2.5 microns or fewer in diameter. The state is a number. The number is followed by the unit of measurement (micrograms per cubic meter: “µg/m³”). For example, PM2.5: 4 µg/m³. In this example, the state is 4.

In addition, the entity can have the following states:

  • Unavailable: The entity is currently unavailable.
  • Unknown: The state is not yet known.