# Air quality (AirLink)

URL: https://pro-weather.com/docs/features/air-quality

> Show live AQI and particulate readings from your Davis AirLink sensor.

If your WeatherLink account includes a **Davis AirLink** air-quality sensor,
your site can show live particulate readings and a colour-coded air-quality
index - no extra setup beyond connecting your account.

## What visitors see

- An **Air quality** tile in the Overview grid and a dedicated **Air quality**
  tab.
- The current **AQI** with a colour-coded health category and a six-band scale
  showing where the current reading sits.
- The **main pollutant** (PM2.5 or PM10) behind the current index.
- Live **PM1, PM2.5 and PM10** concentrations in µg/m³.
- A **historical chart** of air quality over time, with the same range switcher
  as the other tabs.

## Choosing an AQI standard

Different regions score air quality differently, so you can pick the scale your
visitors know, under **Settings → Cards & stations → Air Quality Index
standard**:

- **European EAQI** (the default): a six-band scale - Good, Fair, Moderate,
  Poor, Very poor, Extremely poor.
- **US EPA AQI**: the familiar 0–500 index - Good, Moderate, Unhealthy for
  sensitive groups, Unhealthy, Very unhealthy, Hazardous.

Either way, the index is computed from your AirLink's PM2.5 and PM10 readings,
and the worse pollutant sets the headline.

## Getting the sensor detected

AirLink is discovered automatically when you
[connect WeatherLink](https://pro-weather.com/docs/getting-started/connect-weatherlink). If you add an
AirLink later, open **Connection** and choose **Reconnect & rediscover**; the
air-quality tile and tab appear as soon as particulate readings arrive.

> **Alert on poor air**
>
  With an AirLink you can also add a **PM2.5 above** threshold to your
  [email alerts](https://pro-weather.com/docs/alerts), so you hear about poor air even when you're not
  watching the site.

## Next steps

- [Set up email alerts](https://pro-weather.com/docs/alerts)
- [Tabs & panels](https://pro-weather.com/docs/customizing/panels)
- [Connect your WeatherLink station](https://pro-weather.com/docs/getting-started/connect-weatherlink)