Air quality monitoring

Our monitoring programme enables us to identify trends and further increase our understanding of air quality in your town.

In 2004, the Ministry for the Environment (MfE) introduced National Environmental Standards for Air Quality which help regional councils to manage air quality and meet these standards by 2020.

Our results show that for most of the year, Otago’s air quality is very good and meets national air quality standards. However, during winter when the temperature drops and home-heating increases, air quality often exceeds these standards in some of the areas we monitor.


Where do we measure air quality?

We monitor daily ambient air quality at eight sites across Otago. Four sites are monitored continuously year-round: Alexandra, Arrowtown, Mosgiel and Central Dunedin. The other four sites are monitored during winter: Balclutha, Milton, Clyde, and Cromwell. All the sites are within Air Zones 1 and 2, and are more susceptible to poor air quality in winter.

How do we measure air quality?

We monitor air quality by measuring the level of PM10 in the air. Although too small for the human eye to see, PM10 are tiny smoke particles that make the air hazy and can affect your health.

The national environmental standards set the maximum daily concentration of PM10 at 50 micrograms per cubic metre of air, and this limit may only be exceeded one day per year.

You can check out the daily data from all our sites by checking out our Air Monitoring section below.

Air Monitoring

For up-to-date air quality information click on the map's green squares to select sites of interest. Read more

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