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CSV data files for Newport M4 Junction 25 monitoring site

Listed below are links to CSV data files for Newport M4 Junction 25. These files contain one year's automatic monitoring data and are updated daily. There are two formats to the files, firstly a file containing all pollutants measured at the site for each year followed by pollutant specific data files grouped by monitoring network.

To get the very latest data for Newport M4 Junction 25 use the Data Selector.

All Hourly Pollutant Data for site Newport M4 Junction 25 (Column Format)
2017 2016 2015 2014 2013 2012


Hourly Pollutant Files for Site Newport M4 Junction 25 in Welsh Automatic Urban pollution Monitoring (in 24x365 Table Format)
Nitric OxideNitrogen dioxideNitrogen oxides as nitrogen dioxideOzoneBlack Carbon
2017 2017 2017 2017  
2016 2016 2016 2016  
2015 2015 2015 2015  
2014 2014 2014 2014  
2013 2013 2013 2013  
2012 2012 2012 2012 2012