|Wood and coal fires
- The proportion of homes using wood fires for home heating dropped from 41% in 2006 to 37% in 2013.
- The proportion of homes using coal fires dropped from 7% in 2006 to 4% in 2013.
- In 2017, there were about 4.2 million vehicles in New Zealand - the highest number ever.
- The average age of light passenger vehicles in New Zealand has increased to 14.4 years in 2016. Older vehicles tend to release more harmful vehicle emissions.
- In 2017, there were 792 light vehicles per 1,000 people in New Zealand.
- In the fourth quarter of 2018, there were 8,462 pure electric and 2,759 plug-in hybrid vehicles in the New Zealand motor vehicle fleet.
- Most monitoring sites (45 out of 53) met the annual average PM10 guidelines in 2013.
- There were eight monitored sites that exceeded the WHO annual guideline. Anzac Park in Timaru had the highest annual PM10 level, followed by Alexandra and Woolston.
- In 2013, 21 of the 37 airsheds exceeded the daily PM10 standard on 2 or more days.
|Other air pollutants
- Most monitoring sites for nitrogen dioxide met the annual average NO₂ guideline in 2013 (118 out of 122 sites).
- Six out of nine monitoring stations exceeded the 24-hour average WHO guideline for sulphur dioxide between 2008 and 2017.
- All 21 monitoring sites for carbon monoxide met the 8-hour standard in 2013.
|Health effects of air pollution
- In 2016, human-made air pollution in New Zealand was associated with an estimated: 1,277 premature deaths, 676 extra hospital admissions for respiratory and cardiac illnesses and 1.49 million restricted activity days.
- Timaru District, Invercargill City, and Gore District were the territorial authorities with the highest number of health effects per 100,000 people in 2016.