Reigate and Banstead Borough Council Monitoring Data

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Horley (HORE, an AURN site)

Latitude: 51.165865
Longitude: -0.167734
Date Started: 21/11/2007
Altitude: 40 metres
Inlet Height: 3.2 metres
Environment: Urban Background

Latest Data

This monitoring site data was last updated: 15/07/2025 19:00

Parameter Pollution Band Concentration Period
Nitrogen dioxide (NO2) Low (Index 1) 8 µg/m3 hourly mean
PM10 particulate matter (Hourly measured) Low (Index 1) 14 µg/m3 (FIDAS) 24 Hour mean
PM2.5 particulate matter (Hourly measured) Low (Index 1) 6 µg/m3 (Ref.eq) 24 Hour mean
Nitric oxide (NO) not applicable 1 µg/m3 hourly mean
Nitrogen oxides as nitrogen dioxide (NOx as NO2) not applicable 9 µg/m3 hourly mean

Note: Values are based on provisional data. Data are GMT hour ending.
PM10 is measured as a running 24 hour mean, up to the current hour, and the band/index is calculated accordingly.

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Map showing the location of the Horley monitoring site