Particulate Matter Measured at Ennis

Data from Particulate Matter Measured at Ennis

The measurement units for particulate matter are in microgrammes per cubic meter.

The Graph shows the latest available data for particulate matter over the last 30 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.


The particulate matter (PM10) daily limit of 50 ug m-3 is deemed breached if more than 35 exceedances occur in a calendar year.

There have been 3 exceedances at this site in 2018.


The annual limit value for PM2.5 is 25 ug m-3. There is no daily limit value for PM2.5.


Check out our 'what we monitor' page for more information on particulate matter.


** Up-to-date daily PM data is not available due to issues at the site. PM is currently being monitored by gravimetric instruments.