## What is a pollutant?

Pollutants are particles and gasses in the air that, in high concentration, can
be harmful to people's health.

## Reported pollutants

The Air Quality API supports the most common pollutants.

Pollutants information includes:

- Dominant pollutant
- Concentration
- Sources \& Effects

| Code | Display Name | Full Name | Units Measured |
|---|---|---|---|
| co | CO | Carbon monoxide | ppb |
| c6h6 | C6H6 | Benzene | μg/m³ |
| ox | OX | Photochemical oxidants | ppb |
| o3 | 3 | Ozone | ppb |
| nh3 | NH3 | Ammonia | ppb |
| nmhc | NMHC | Non-methane hydrocarbons | ppb |
| no | NO | Nitrogen monoxide | ppb |
| nox | NOX | Nitrogen oxides | ppb |
| no2 | NO2 | Nitrogen dioxide | ppb |
| p25 | P25 | Fine particulate matter (\<2.5µm) | μg/m³ |
| pm10 | PM10 | Inhalable particulate matter (\<10µm) | μg/m³ |
| so2 | SO2 | Sulfur dioxide | ppb |
| trs | TRS | Total reduced sulfur | μg/m³ |