Coarse particles (PM10)
PM10 covers inhalable particles up to ten microns — coarse dust, pollen and particles stirred up by activity and brought in from outdoors. It is the broadest particle metric and the one most tied to visible dust, allergens and outdoor conditions.
Dust, pollen and the air from outside.
PM10 is the particle metric people relate to most — it tracks visible dust and allergens and responds quickly to cleaning and ventilation.
Airways & allergies
Coarse particles irritate the upper airways and carry allergens like pollen, triggering asthma and allergic reactions.
Outdoor marker
PM10 rises with outdoor dust, construction and pollen seasons, showing how much the outside is affecting your indoor air.
Cleaning & activity
Foot traffic, cleaning and movement resuspend coarse dust — PM10 makes the effect of housekeeping visible.
Compliance
WHO and EU guidelines set PM10 limits. Continuous data shows whether your spaces stay within them.
Benchmarked to the WHO guideline.
The WHO 2021 24-hour guideline is 45 µg/m³, with an annual target of 15 µg/m³. Healthy interiors stay within these; higher bands follow common air-quality indices.
Coarse dust, mostly mechanical.
PM10 is dominated by dust and particles lifted by movement and brought in from outside, rather than by combustion.
Foot traffic & cleaning
Walking, dry sweeping and movement resuspend settled dust — a major indoor PM10 source.
Outdoor dust & pollen
Construction, roads, soil and pollen seasons raise outdoor PM10 that enters with ventilation.
Materials & handling
Paper, packaging, textiles and bulk materials shed coarse particles when handled.
Ventilation & filters
Poor or clogged filtration lets coarse particles through; data shows when filters need attention.