Hertfordshire and Bedfordshire Monitoring Data
Hertsmere Borehamwood Roadside (HB009)
Latitude: 51.659803
Longitude: -0.261916
Longitude: -0.261916
Date Started: 09/09/2014
Environment: Urban Background
Environment: Urban Background
Latest Data
This monitoring site data was last updated: 30/04/2025 10:00
| Parameter | Pollution Band | Concentration | Period |
|---|---|---|---|
| Nitrogen dioxide (NO2) | Low (Index 1) | 19 µg/m3 | hourly mean |
| PM10 particulate matter (Hourly measured) | Low (Index 1) | 16 µg/m3 (FIDAS) | 24 Hour mean |
| PM2.5 particulate matter (Hourly measured) | Low (Index 1) | 10 µg/m3 (Ref.eq) | 24 Hour mean |
| Nitric oxide (NO) | not applicable | 6 µg/m3 | hourly mean |
| Nitrogen oxides as nitrogen dioxide (NOx as NO2) | No Data | 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.
Other monitoring sites
Use the dropdown below to switch to another monitoring site within this local authority.