Reduced harmful emissions from transport
NO2 monitoring across the region - five year rolling average
Nitrogen dioxide is a transport generated emissions pollutant which is currently monitored around the region and used to report on emissions harmful to human health. The figure shows the results from Nitrogen dioxide monitoring sites, the level is calculated using a five year average. The data are obtained from the NZTA’s network of air quality monitoring sites which cover state highways and local roads.
The NO2 data is measured using passive samplers at chosen sites in all areas around the region except the Wairarapa. Since 2013 there has been a downward trend in the level of nitrogen dioxide; the 2018 result is 20.5 µg/m-3, overall there has been a 8% reduction in NO2 over this time.