Air quality check before buying a house

Where the air quality data comes from

MyPropertyScan's air-quality check comes from the Copernicus Atmosphere Monitoring Service (CAMS), the European Union's atmospheric modelling programme, delivered through the Open-Meteo air-quality API. For a given latitude and longitude, the lookup reads three current figures: PM2.5 (fine particulate matter), nitrogen dioxide (NO2), and the European Air Quality Index, a combined 0-100+ score built from multiple pollutants.

This is modelled data for a nearby atmospheric grid cell, not a reading taken outside the front door, and it covers the whole of the UK rather than being limited to one nation. Treat it as a strong directional signal, not a certified monitoring-station result for the exact address.

What the air quality bands mean

MyPropertyScan collapses the European Air Quality Index into three buyer-friendly bands:

These bands are approximate. The rating is calculated from the underlying decimal AQI reading before it is rounded for display, so a reading right at a boundary can occasionally show a rounded number that looks like it belongs to the band next door (for example, a displayed 40 that is rated "moderate" because the underlying reading was 40.1). Treat the band as the useful signal, not the exact displayed number.

The World Health Organization also publishes long-term guideline levels for individual pollutants, including an annual mean guideline for both PM2.5 and NO2. Those figures describe sustained, long-run exposure, so a single current reading cannot confirm whether an address is above or below them either way. The general framing is the same as any air quality index: lower is better, and the banding used here is MyPropertyScan's own simplification of the European Air Quality Index, intended as a screening signal rather than a medical assessment.

Why air quality is worth checking before you buy

Air quality sits in the same category as noise: it is a location factor you inherit with the address, not something you can renovate away. General UK public health guidance links sustained exposure to higher air pollution with respiratory and cardiovascular health effects, which is a reasonable factor to weigh for anyone in the household with asthma, another respiratory condition, or young children.

It can also matter for resale and marketability, in the same informal way that a busy road or a nearby industrial estate does. A future buyer is increasingly likely to run the same kind of postcode check you are running now, so understanding the picture early gives you the option to ask questions, factor it into your offer, or simply decide it is not a concern for your household.

How to check air quality for a specific address

1. 1Run the MyPropertyScan free preview for the address. The Copernicus CAMS air-quality reading is included free, with no payment card required, alongside flood risk, EPC rating, crime data and tenure signals.
2. 2Cross-check with DEFRA's UK-AIR site, which publishes the UK's official air quality monitoring data and daily index.
3. 3Check whether the local authority has declared an Air Quality Management Area (AQMA) covering the street. Councils publish AQMA boundaries and the pollutants that triggered them on their own websites.
4. 4Visit at a busy time of day and take note of visible traffic congestion, nearby industrial activity, or a main road directly outside the property, all of which can push local pollution above the wider area's modelled average.

Frequently asked questions