developers.home-assistant/docs/entity_air_quality.md

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Air Quality Entity Air Quality

Properties

Properties should always only return information from memory and not do I/O (like network requests). Implement update() or async_update() to fetch data.

Name Type Default Description
particulate_matter_2_5 float Required The particulate matter 2.5 (<= 2.5 μm) level.
particulate_matter_10 float Required The particulate matter 10 (<= 10 μm) level.
particulate_matter_0_1 float None The particulate matter 0.1 (<= 0.1 μm) level.
air_quality_index float None The Air Quality Index (AQI).
ozone float None The O3 (ozone) level.
carbon_monoxide float None The CO (carbon monoxide) level.
carbon_dioxide float None The CO2 (carbon dioxide) level.
sulphur_dioxide float None The SO2 (sulphur dioxide) level.
nitrogen_oxide float None The N2O (nitrogen oxide) level.
nitrogen_monoxide float None The NO (nitrogen monoxide) level.
nitrogen_dioxide float None The NO2 (nitrogen dioxide) level.
volatile_organic_compounds float None The volatile organic compounds (VOC) level.

Properties have to follow the units defined in the unit_system.