Nitrogen dioxide 10 year trends, Waka Kotahi NZTA, 2011-2020

13 Oct 2021

This dataset was first added to MfE Data Service on 13 Oct 2021.

Nitrogen dioxide (NO2) is a gas that is harmful to human health (United States Environmental Protection Agency (US EPA), 2021), ecosystems, and plants (US EPA, 2008). It can be emitted directly into the air but is often formed as a secondary pollutant when nitric oxide (NO) emissions react with other chemicals. It also contributes to the formation of secondary particulate matter (PM) and ozone, which have their own health impacts. In New Zealand, motor vehicles are the main human-made source of nitrogen oxides (NOx) the collective term for NO2 and NO.

Human exposure to high nitrogen dioxide concentrations causes inflammation of the airways and respiratory problems and can trigger asthma attacks. Nitrogen dioxide can cause leaf injury in plants exposed to high levels. It also contributes to forming secondary particulate matter and ozone, which have their own health impacts.

Nitrogen dioxide is a gas primarily formed through burning fossil fuels, mainly by motor vehicles (particularly diesel), but also from industrial emissions. Because nitrogen dioxide concentrations are closely associated with vehicle emissions, it can be used as a proxy for other motor-vehicle pollutants such as benzene, carbon dioxide, and carbon monoxide.

This dataset reports on the annual trends assessed for the period 2011-2020.

More information on this dataset and how it relates to our environmental reporting indicators and topics can be found in the attached data quality pdf.

1. nitrogen_dioxide_nzta_10yr_trend_dqr.pdf 199 KB pdf
Technical Details
Table ID 106274
Data type Table
Row count 110
Columns field_1, site, latitude, longitude, urban_or_roadside, p, p_stars, intercept, slope, lower, upper, trend_likelihood, period_start, period_end
Services Web Feature Service (WFS), Catalog Service (CS-W), Atom Feed
Added 13 Oct 2021
Revisions 1 - Browse all revisions
Current revision Imported on Oct. 12, 2021 from CSV .