Southend Borough Council Monitoring Data

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Southend-on-Sea (SEND, an AURN site)

Latitude: 51.544166
Longitude: 0.678331
Date Started: 24/07/2000
Altitude: 37 metres
Environment: Urban Background

Latest Data

This monitoring site data was last updated: 03/11/2025 04:00

Parameter Pollution Band Concentration Period
Ozone (O3) Low (Index 2) 45 µg/m3 8 Hour mean
Nitrogen dioxide (NO2) Low (Index 1) 2 µg/m3 hourly mean
PM10 particulate matter (Hourly measured) Low (Index 1) 8 µg/m3 (FIDAS) 24 Hour mean
PM2.5 particulate matter (Hourly measured) Low (Index 1) 4 µg/m3 (Ref.eq) 24 Hour mean
Nitric oxide (NO) not applicable 0 µg/m3 hourly mean
Nitrogen oxides as nitrogen dioxide (NOx as NO2) not applicable 3 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.

Map showing the location of the Southend-on-Sea monitoring site