Data

Note: PM2.5 concentrations are given in micrograms per cubic metre of air, or µg/m3.

Source: Regional councils of Wellington, Canterbury; Auckland Council

Source: Regional councils of Northland, Bay of Plenty, Waikato, Hawke's Bay, Manawatu-Wanganui, Wellington, Canterbury, West Coast, Otago, Southland; District councils of Marlborough and Tasman; Nelson City Council; Auckland Council

Rural areas as defined by Statistics New Zealand.

Average is unweighted average across North Island rural areas.

Note: There is no rural monitoring in the South Island. PM10 concentrations are given in micrograms per cubic metre of air,

Source: Regional councils of Bay of Plenty, Waikato; Auckland Council

Between 25,000 and 60,000 people.

Average is population weighted average of monitoring sites in medium-sized towns.

Source: Regional councils of Northland, Bay of Plenty, Hawke's Bay, Manawatu-Wanganui, Wellington, Canterbury, Southland;

Note: PM10 concentrations are given in micrograms per cubic metre of air, or µg/m3.

Source: Institute of Geological and Nuclear Sciences. Regional councils of Wellington,
Hawke's Bay; Nelson City Council; Marlborough District Council, Otago; Auckland Council

Greater than 100,000 people.

Average is population weighted average of monitoring sites in cities.

Note: PM10 concentrations are given in micrograms per cubic metre of air, or µg/m3.

Source: Regional councils of Waikato, Wellington, Canterbury, Otago; Auckland Council

Maximum ozone concentration during 8-hour periods.

Note: Ozone concentrations are given in micrograms per cubic metre of air, or µg/m3.

Source: Auckland Council

OECD countries, 2011

PM10 concentrations are given in micrograms per cubic metre of air, or µg/m3.

Source: World Health Organization

Note that data for Israel and Australia are for 2008
Note that data for Japan and Denmark are for 2010
Note that data for New Zealand and Canada are for 2012

Less than 25,000 people.

Average is population weighted average of monitoring sites in small towns.

Note: PM10 concentrations are given in micrograms per cubic metre of air, or µg/m3.

Source: Regional councils of Northland, Waikato, Manawatu-Wanganui, Wellington, West Coast, Canterbury, Otago, Southland;

PM10 concentrations are given in micrograms per cubic.

Source:
Regional councils of Northland, Bay of Plenty, Waikato, Hawke's Bay,
Manawatu-Wanganui, Wellington, Canterbury, West Coast, Otago, Southland;
District councils of Marlborough and Tasman; City Council of Nelson; Auckland Council