Ozone and Nitrogen Dioxide Levels

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 have occurred. There have been 0 exceedances at this site to date in 2012.
• The O₃ information threshold is 180 ug m^-3. There have been 0 exceedances at this site to date in 2012.

The Graph shows the latest available results over the last 7 days.

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. Check the site log for additional information.