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Navigation tip: find out about sources of air quality pollutants and seasonal air quality patterns in this town by selecting the town name above. View regional summary results by selecting Air Quality.

Wellington Central (Willis Street)

This site was established in early 2015 and replaces the old Wellington Central (Corner V) monitoring site. This site primarily measures the impact of urban motorway traffic emissions on air quality using nitrogen dioxide and carbon monoxide as indicators. PM10 and PM2.5 are also measured.

 

This site primarily measures the impact of traffic emissions on local air quality beside a busy road in the inner city. The site is very exposed to the wind so air pollution levels don't build up as much as they would if the site was  on a street enclosed by tall buildings. 

 

Scientific Indicators
Scientific data for this site

This dashboard shows the latest results for air quality indicators collected by regional councils and unitary authorities.  Indicators are shown against the National Environmental Standards for Air Quality (NES-AQ).  Where no national standards exist for the air quality measurements shown, the data are compared against other guidelines (e.g. World Health Organization (WHO) 2021 guidelines, Ambient Air Quality Guidelines (AAQG)).  

Select 'Show more information +' under a dashboard to see the current and historical monitoring data.

 

  • PM10 Data verified to 31/12/2023
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    PM10 information

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    • Daily
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    • Exceedances
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    Guideline


    Concentration (µg/m3)


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    Air temperature (℃)


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    What is this graph showing me?

    This graph shows how concentrations of PM10 change on an hourly, daily, monthly or annual basis for the selected time period. The number of exceedance days can be viewed over the last 10 years or all years if available.

    The PM10 daily average concentrations and exceedance days are compared to the National Standard (NES-AQ), and the PM10 annual average concentrations are compared to the WHO guideline.  The standard and guideline limits are denoted by the red horizontal line.   There are no guidelines for hourly or monthly average concentrations.  For information about allowable exceedances and targets, and the limitations of data shown, see the factsheet on monitoring air quality in New Zealand. 

    The concentrations depend on local sources of emissions and weather conditions. Emissions from various sources change, depending on whether it's a weekday or the weekend or at different times of the year (e.g. emissions from home heating go up in the cold winter months).  Still conditions often lead to high concentrations, as there is no wind to blow away the pollutants in the air.  At some monitoring sites, the hourly temperature and wind data are available to explore the relationship between local weather conditions and PM10 concentrations.  See this factsheet about why air quality is important and factors that influence air quality. 

  • PM2.5 Data verified to 31/12/2023
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    PM2.5 information

    • Hourly
    • Daily
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    • Annual
    • Exceedances
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    Months:
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    Showing:

    Guideline


    Concentration (µg/m3)


    Wind speed (km/h)


    Air temperature (℃)


    Guideline

    What is this graph showing me?

    This graph shows how concentrations of PM2.5 change on an hourly, daily, monthly or annual basis for the selected time period. The number of exceedance days can be viewed over the last 10 years or all years if available.

    The PM2.5 concentrations and exceedance days are compared to the WHO guidelines.  The guideline limits are denoted by the red horizontal line.  There are no guidelines for hourly or monthly average concentrations.  For information about allowable exceedances and targets, and the limitations of data shown, see the factsheet on monitoring air quality in New Zealand. 

    The concentrations depend on local sources of emissions and weather conditions. Emissions from various sources change, depending on whether it's a weekday or the weekend or at different times of the year (e.g. emissions from home heating go up in the cold winter months).  Still conditions often lead to high concentrations, as there is no wind to blow away the pollutants in the air.  At some monitoring sites, the hourly temperature and wind data are available to explore the relationship between local weather conditions and PM2.5 concentrations.  See this factsheet about why air quality is important and factors that influence air quality. 

  • Nitrogen dioxide Data verified to 31/12/2023
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    Nitrogen dioxide information

    • Hourly
    • Daily
    • Monthly
    • Annual
    • Exceedances
    • Show wind speed
    • Show temperature
    Months:
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    Showing:

    Guideline


    Concentration (µg/m3)


    Wind speed (km/h)


    Air temperature (℃)


    Guideline

    What is this graph showing me?

    This graph shows how concentrations of nitrogen dioxide change on an hourly, daily, monthly or annual basis for the selected time period.  The number of exceedance hours can be viewed over the last 10 years or all years if available. 

    The nitrogen dioxide hourly average concentrations and exceedances are compared to the National Standard (NES-AQ). The nitrogen dioxide daily and annual average concentrations are compared to the WHO guidelines.  The standard and guideline limits are denoted by the red horizontal line. There is no guideline for monthly average concentrations.  For information about allowable exceedances and targets, and the limitations of data shown, see the factsheet on monitoring air quality in New Zealand. 

    The concentrations depend on local sources of emissions and weather conditions. Emissions from various sources change, depending on whether it's a weekday or the weekend or at different times of the year.  Still conditions often lead to high concentrations, as there is no wind to blow away the pollutants in the air.  At some monitoring sites, the hourly temperature and wind data are available to explore the relationship between local weather conditions and nitrogen dioxide concentrations.  See this factsheet about why air quality is important and factors that influence air quality. 

  • Carbon monoxide Data verified to 31/12/2021
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    Carbon monoxide information

    • Hourly
    • Daily
    • Monthly
    • Annual
    • Show wind speed
    • Show temperature
    Months:
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    Showing:

    Guideline


    Concentration (mg/m3)


    Wind speed (km/h)


    Air temperature (℃)


    Guideline

    What is this graph showing me?

    This graph shows how concentrations of carbon monoxide change on an hourly, daily, monthly or annual basis for the selected time period. 

    The carbon monoxide hourly and daily concentrations are compared to WHO guidelines. The guideline limits are denoted by the red horizontal line.  There are no guidelines for monthly or annual average data. The NES-AQ is for an eight-hour average carbon monoxide concentration of 10 mg/m3, not shown here.  For information about allowable exceedances and targets, and the limitations of data shown, see the factsheet on monitoring air quality in New Zealand. 

    The concentrations depend on local sources of emissions and what the weather is.  Emissions from various sources change, depending on whether it’s a weekday or the weekend or at different times of the year. Still conditions often lead to high concentrations, as there is no wind to blow away the pollutants in the air. At some monitoring sites, the hourly temperature and wind data are available to explore the relationship between local weather conditions and carbon monoxide concentrations.  See this factsheet about why air quality is important and factors that influence air quality.