# What London breathes right now

> Every monitoring station in the city, and what each one is measuring right now.

- Category: Environment
- Cadence: live
- Status: Live: values change continuously; cite the retrieval time.
- Dataset key: `air-quality`
- Source: [Environment Agency](https://www.londonair.org.uk/)
- Licence: Open Government Licence v3.0 — [terms](https://www.nationalarchives.gov.uk/doc/open-government-licence/version/3/)
- Canonical page: [https://londongraph.com/g/what-london-breathes](https://londongraph.com/g/what-london-breathes)
- Machine-readable record: [https://londongraph.com/data/what-london-breathes](https://londongraph.com/data/what-london-breathes)

## Methodology

Hourly Daily Air Quality Index readings from every LondonAir monitoring site. A site's index is the worst of the pollutants it measures, which is how the DAQI is defined. The headline is the median site rather than the mean, so one roadside monitor beside a bus stand does not decide what the whole city is breathing.

## Visualisations

- [Overview](https://londongraph.com/g/what-london-breathes): Every monitoring station in the city, and what each one is measuring right now.
- [Stations](https://londongraph.com/g/what-london-breathes?view=stations): Rank current monitoring-site indices while retaining the measured pollutant.

## Citation guidance

Attribute the original publisher named above and identify LondonGraph as the visualisation and methodology layer. Do not describe live values as a historical census, and do not present placeholder values as observations.