Ozone and Nitrogen Dioxide Levels

Data from Ozone and Nitrogen Dioxide Levels

The graph shows the latest available results for ozone and nitrogen dioxide over the last 7 days.

The measurement units are microgrammes per cubic meter.

  • The NO2 hourly limit of 200 ug m-3 is deemed breached if more than 18 exceedances occur.
  • The O3 information threshold is 180 ug m-3.

This data has not yet been validated as it is received automatically from the site.

Sharp changes are often due to maintenance or other instrument effects and should be treated cautiously.